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SLS / Orion / Beyond-LEO HSF - Constellation => Heavy Lift Launch Vehicle (HLV/SLS) => Topic started by: Chris Bergin on 07/18/2014 10:20 AM

Title: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/18/2014 10:20 AM
These wonderful engines are living on, and as such we should have an update thread as they head into test firings, etc.

Articles on this path:

http://www.nasaspaceflight.com/tag/ssme/ (http://www.nasaspaceflight.com/tag/ssme/) <---pretty much a few years of recent history on the path to testing on that one page.

E0525 is now installed on the A-1 Test Stand. So we're getting close.
http://www.nasaspaceflight.com/2014/07/rs-25-stennis-testing-sls-schedule/ (http://www.nasaspaceflight.com/2014/07/rs-25-stennis-testing-sls-schedule/)

====

L2 SSME is a really great section of content, from SSME bibles, to SSME FRR, MMT, PRCB, to their role with SLS, videos and all sort - really love that L2 subsection (and it's a big one!):
http://forum.nasaspaceflight.com/index.php?action=tags;tagid=1409 (http://forum.nasaspaceflight.com/index.php?action=tags;tagid=1409)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 08/25/2014 02:19 PM
Mighty RS25 #0525 takes her place on the A-1 test stand and prepares to flex her bells and "make it rain" once again at Stennis Space Center in Mississippi. #0525 has been and will be the engine that does the grunt work on the stand, so that her "sisters in thrust" can fly with grace.

  Eventual 109% RPT testing will stress the test stands in the future.
"Modifications to the engines, like higher thrust levels, were needed on the proven workhorse to prepare them for the SLS. To accommodate a higher thrust level, the number of engines was increased from three, used during the shuttle era, to four. The power level also was increased for each engine.

Engines on the shuttle ran at 491,000 pounds vacuum thrust (104.5-percent of rated power level). After analyzing temperature and other factors on the engine, the power level was increased for SLS to 512,000 pounds vacuum thrust (109 percent of rated power level)."


Quote and photo credit:NASA
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: newpylong on 11/05/2014 03:08 PM
http://www.nasa.gov/sites/default/files/s14-113-ssc-2014-00717-rs-25_engine.jpg
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 12/13/2014 01:31 AM
New "Brain" for RS-25 Engine is No Technological Flashback to the '80s
Megan Davidson MSFC - December 10, 2014

Take a look at your current devices. Can you imagine swapping that smartphone for a gigantic cellphone from the 1980s? Surfing the Internet with dial-up speed? Working out to your favorite music with a cassette player?

Today's technology is better, faster and more innovative. People have to keep up with the rapidly changing times, and so does the "brain" for the RS-25 rocket engine.

The engine controller unit on the RS-25 -- formerly known as the space shuttle main engine -- helped propel all of the space shuttle missions to space. It allows communication between the vehicle and the engine, relaying commands to the engine and transmitting data back to the vehicle. The controller also provides closed-loop management of the engine by regulating the thrust and fuel mixture ratio while monitoring the engine's health and status.

Just like the ever-evolving computer, the engine controller unit needed a "refresh" to provide the capability necessary for four RS-25 engines to power the core stage of NASA's new rocket, the Space Launch System (SLS), to deep space missions. The core stage, towering more than 200 feet tall with a diameter of 27.6 feet, will store cryogenic liquid hydrogen and liquid oxygen that will feed the vehicle’s RS-25 engines.

"You can't put yesterday's hardware on today's engine, especially since many parts of the shuttle-era engine controller unit aren't even made anymore," said Russ Abrams, avionics subsystem manager in the SLS Liquid Engines Office at NASA's Marshall Space Flight Center in Huntsville, Alabama. Marshall manages the SLS Program for the agency. "We need the most updated control systems for this engine to meet SLS specifications and take us to places we've never been before in space."

Controller development is based heavily on the recent development experience with the J-2X engine controller. An engineering model RS-25 controller is being tweaked and tested at Marshall. At one of the center's test facilities, engineers are simulating the RS-25 in flight, using real engine actuators, sensors, connectors and harnesses.

A second engineering model controller and RS-25 engine also recently were installed on the A-1 test stand at NASA's Stennis Space Center near Bay St. Louis, Mississippi. Pending final preparation and activation work, the engine test series is anticipated to begin in 2015.

"NASA and its partners have been working very hard to evolve this crucial piece of hardware and software for the RS-25, and we look forward to seeing it tested on the A-1 stand very soon," said Johnny Heflin, deputy manager of the SLS Liquid Engines Office at Marshall. "This is an exciting time for everyone involved with this project."

The RS-25 and controller work are a collaborative effort between NASA and prime contractor Aerojet Rocketdyne of Sacramento, California.

The first flight test of the SLS will be configured for a 70-metric-ton (77-ton) lift capacity and carry an uncrewed Orion spacecraft beyond low-Earth orbit to test the performance of the integrated system. As the SLS evolves, it will be the most powerful rocket ever built and provide an unprecedented lift capability of 130 metric tons (143 tons) to enable missions even farther into our solar system.

http://www.nasa.gov/sls/brain-for-rs-25-engine.html (http://www.nasa.gov/sls/brain-for-rs-25-engine.html)

Photo Caption: The engine controller unit allows communication between the vehicle and the engine, relaying commands to the engine and transmitting data back to the vehicle. Engineering model controllers are being tested at the Marshall Center and Stennis Space Center. Image Credit: NASA/MSFC
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 12/17/2014 10:26 PM
Chill Test, Warm Success

NASA engineers at Stennis Space Center near Bay St. Louis, Miss., took a major step Dec. 11 towards hotfire testing of RS-25 rocket engines that will help power the new Space Launch System (SLS) on mis­sions to deep-space destinations. A-1 Test Stand operators at Stennis completed a chill test of developmental engine No. 0525, clearing the way for hotfire testing to begin in 2015.

A chill test is a full-dress rehearsal for hotfire testing. During the test super-cold rocket propellants are flowed through stand and engine piping to ensure there are no problems with delivery. RS-25 engines are fueled by liquid hydrogen and liquid oxygen, which flow at temperatures reaching less than -400 degrees Fahrenheit. During the chill test, engineers monitor such things as temperatures, pressures, and flow rates of the propellants. They also seek to verify the steps of the chill procedure and accurately gauge the amount of time needed to chill the pumps and engine for hotfire tests. Such data is studied to make any needed adjustments and to prepare the hotfire test sequence and requirements.  A similar test was conducted earlier in the year without an engine installed. Liquid nitrogen was flowed through newly installed piping as a preliminary test of its design.

Modification of the A-1 Test Stand for RS-25 testing has been under way for more than a year. Various stand components and configurations had to be changed to enable RS-25 testing. RS-25 engines are remaining space shuttle main engines, which have been modified for the SLS vehicle. A configuration of four RS-25 engines will power the SLS core stage. In addition to conducting development and acceptance testing of individual RS-25 engines on the A-1 stand, NASA engineers are making preparations to test the SLS core stage configuration with four RS-25 engines on the B-2 Test Stand at Stennis.

http://www.nasa.gov/content/chill-test-warm-success (http://www.nasa.gov/content/chill-test-warm-success)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 12/20/2014 01:35 AM
Aerojet Rocketdyne posted some b-roll of that today on YouTube:

https://www.youtube.com/watch?v=d-cTBY776cc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/09/2015 02:54 PM
Test Fire today!
http://www.nasaspaceflight.com/2015/01/stennis-rs-25-return-sls-engine-firing/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: robertross on 01/09/2015 03:06 PM
Test Fire today!
http://www.nasaspaceflight.com/2015/01/stennis-rs-25-return-sls-engine-firing/

Nice article Chris.

And finally out in the open:
"Several additional engines have also been ordered from Aerojet Rocketdyne by NASA, known solely as the RS-25 (as opposed being called the RS-25E), which are cheaper, expendable versions of the engine. Further information on those engines will be revealed at the conclusion of the procurement process."
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 01/09/2015 07:59 PM
SLS Core Stage Engine: In It for the Long Haul
January 9, 2015

[...]

NASA plans to restart RS-25 production to provide engines for future flights by working with Aerojet Rocketdyne to further adapt and modify the engine design to be more affordable, while increasing the planned thrust to 521,700 pounds.

"We had identified significant cost and time saving ideas for the RS-25 before the shuttle program ended," Wofford said. "We see many opportunities for process and manufacturing savings with the change to an expendable engine and the maturation of technologies, such as 3D printing and structured light scanning."

Initial production will be for six new engines and more beyond that once NASA gains experience with the design and manufacturing changes. With that, the RS-25 is expected to be exploring space for many more decades and building on its space shuttle legacy.

http://www.nasa.gov/sls/core-stage-engine.html (http://www.nasa.gov/sls/core-stage-engine.html)

Edit to add:

And just for the record the pre-solicitation notice for the purchase of six additional RS-25 engines can be found here (issued Sep 24, 2014):

https://www.fbo.gov/spg/NASA/GMSFC/POVA/NNM06AB13C/listing.html (https://www.fbo.gov/spg/NASA/GMSFC/POVA/NNM06AB13C/listing.html)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: DDG40 on 01/09/2015 10:51 PM
Just started the test at 5:42 CST.  So good to hear that sound again. I am located 7 miles from the test stand.  shut down at 5:51 sounds like it went well.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/09/2015 11:17 PM
Thanks! Updated the article.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: newpylong on 01/10/2015 01:01 AM
http://www.nasa.gov/press/2015/january/rs-25-engine-testing-blazes-forward-for-nasas-space-launch-system/index.html#.VLCHCSMo7qA

500s test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 01/10/2015 02:39 AM
SLS RS-25 Testing Heats Up

Published on Jan 9, 2015

The RS-25 engine that will drive NASA's new rocket, the Space Launch System, to deep space blazed through its first successful test Jan. 9 at the agency's Stennis Space Center near Bay St. Louis, Mississippi. The RS-25 fired up for 500 seconds on the A-1 test stand, providing NASA engineers with critical data on the engine controller unit and inlet pressure conditions

https://www.youtube.com/watch?v=hG8odscqlfI
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 01/10/2015 10:06 AM
From the link newpylong posted:

RS-25 Engine Testing Blazes Forward for NASA's Space Launch System
RELEASE 15-007 January 9, 2015

[...]

"We’ve made modifications to the RS-25 to meet SLS specifications and will analyze and test a variety of conditions during the hot fire series,” said Steve Wofford, manager of the SLS Liquid Engines Office at NASA's Marshall Space Flight Center in Huntsville, Alabama, where the SLS Program is managed. "The engines for SLS will encounter colder liquid oxygen temperatures than shuttle; greater inlet pressure due to the taller core stage liquid oxygen tank and higher vehicle acceleration; and more nozzle heating due to the four-engine configuration and their position in-plane with the SLS booster exhaust nozzles.”

The engine controller unit, the "brain" of the engine, allows communication between the vehicle and the engine, relaying commands to the engine and transmitting data back to the vehicle. The controller also provides closed-loop management of the engine by regulating the thrust and fuel mixture ratio while monitoring the engine's health and status. The new controller will use updated hardware and software configured to operate with the new SLS avionics architecture.

"This first hot-fire test of the RS-25 engine represents a significant effort on behalf of Stennis Space Center’s A-1 test team," said Ronald Rigney, RS-25 project manager at Stennis. "Our technicians and engineers have been working diligently to design, modify and activate an extremely complex and capable facility in support of RS-25 engine testing."

Testing will resume in April after upgrades are completed on the high pressure industrial water system, which provides cool water for the test facility during a hot fire test. Eight tests, totaling 3,500 seconds, are planned for the current development engine. Another development engine later will undergo 10 tests, totaling 4,500 seconds. The second test series includes the first test of new flight controllers, known as green running.

http://www.nasa.gov/press/2015/january/rs-25-engine-testing-blazes-forward-for-nasas-space-launch-system/index.html (http://www.nasa.gov/press/2015/january/rs-25-engine-testing-blazes-forward-for-nasas-space-launch-system/index.html)

[my underline]
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/28/2015 10:50 PM
There's a hot fire of 0525 tonight local time.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/29/2015 12:25 AM
And complete.

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: CameronD on 05/29/2015 12:36 AM
Engine assembly in two minutes:

https://www.youtube.com/watch?v=HtE_61ZR67Y
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/29/2015 01:50 AM
Thrown together a quick article to mark the testing, the path, new engine we previously reported and some general "I do love this engine" history:
http://www.nasaspaceflight.com/2015/05/stennis-rs-25-full-duration-test-2/

Oh and a couple of Okan renders from L2 SLS ;D
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 06/11/2015 07:24 PM
Boom! Test 3 just occurred for E0525!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: PahTo on 06/11/2015 08:14 PM

I hope the "Boom!" part is just a colloquial and not indicative of any event during said test...
;)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 06/12/2015 02:22 AM
video of the test became available on You Tube and then yanked.  Will keep an eye out for it.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: JBF on 06/12/2015 03:19 AM
There is a link on their facebook page. https://video-iad3-1.xx.fbcdn.net/hvideo-xtf1/v/t43.1792-2/11405746_10153319655176772_676654142_n.mp4?oh=6ca4719458f262fa5fbc9df28658c6f4&oe=557A755C (https://video-iad3-1.xx.fbcdn.net/hvideo-xtf1/v/t43.1792-2/11405746_10153319655176772_676654142_n.mp4?oh=6ca4719458f262fa5fbc9df28658c6f4&oe=557A755C)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: okan170 on 06/12/2015 03:31 AM
Its up on this end:
https://www.youtube.com/watch?v=hmYX4Muf9Tw
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: hpras on 06/12/2015 03:51 AM
Cool shots of the shock wave cone (lack of better term) moving towards the engine as it's throttled down and away on throttle up. 
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 06/12/2015 10:37 PM
Article for the test fire, but more a family history on the engines:
http://www.nasaspaceflight.com/2015/06/stennis-fires-rs25-salvo/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 06/13/2015 12:37 AM
Article for the test fire, but more a family history on the engines:
http://www.nasaspaceflight.com/2015/06/stennis-fires-rs25-salvo/

Chris,  Great write up and history.  Such great engines.  Great to see them used again.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 06/13/2015 05:14 AM
Article for the test fire, but more a family history on the engines:
http://www.nasaspaceflight.com/2015/06/stennis-fires-rs25-salvo/
Great article Chris.  I'm honoured with the L2 link.  It's nice to have the entire RS-25D family listed altogether in your article.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 06/13/2015 09:01 AM
Article for the test fire, but more a family history on the engines:
http://www.nasaspaceflight.com/2015/06/stennis-fires-rs25-salvo/

Chris,  Great write up and history.  Such great engines.  Great to see them used again.

Agree with that.  Lovely to see them firing again even if it's just on a test stand for now.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: jacqmans on 06/13/2015 02:19 PM
The RS-25 engine fires up at the beginning of a 500-second test June 11 at NASA's Stennis Space Center near Bay St. Louis, Mississippi. Four RS-25 engines will power the core stage of NASA's new rocket, the Space Launch System.

Image credit: NASA/Stennis
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: jacqmans on 06/15/2015 01:52 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 06/25/2015 09:23 PM
Test 4 of 7 has begun.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 06/25/2015 09:39 PM
And complete.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: okan170 on 06/26/2015 02:55 AM
Test is now on YouTube:
https://www.youtube.com/watch?v=iGsRS-s7Rv0
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 06/26/2015 09:11 AM
Longest SLS Engine Test Yet Heats Up Summer Sky
June 25, 2015

South Mississippi was hotter than usual on June 25 when the fire and heat produced by the longest test firing yet of a Space Launch System (SLS) RS-25 rocket engine at NASA’s John C. Stennis Space Center combined with already climbing summer temperatures. Engineers conducted a 650-second test of a RS-25 developmental engine as part of its preparation for a return to deep-space missions aboard the new Space Launch System rocket. NASA is designing the SLS to carry humans deeper into space than ever before, to such destinations as an asteroid and Mars. The core stage of the new vehicle will be powered by four RS-25 engines, former space shuttles main engines operated at slightly higher power levels to provide the additional thrust needed to power the SLS. The main goal of the series is to test the engine under simulated temperature, pressure and other changes required by the SLS design. The series also supports the development of a new controller, or “brain,” for the engine. The controller monitors the engine status and communicates the programmed performance needs. The first test in the series was in January. Testing resumed in May after scheduled work was completed on the high-pressure industrial water system that provides the tens of thousands of gallons of water needed during an engine test. Today’s test firing, the fourth in the series, expands on the performance objectives of the first two firings, allowing engineers to better understand the engine under a range of operating conditions. Three additional tests are scheduled in July and August before the initial series is completed. Each test moves NASA a step closer to a new national era of space exploration. As the SLS evolves, it will provide an unprecedented lift capability of 130 metric tons (143 tons) to enable missions farther into our solar system to places like Mars.

Last Updated: June 26, 2015
Editor: LaToya Dean


http://www.nasa.gov/image-feature/longest-sls-engine-test-yet-heats-up-summer-sky (http://www.nasa.gov/image-feature/longest-sls-engine-test-yet-heats-up-summer-sky)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/17/2015 07:28 PM
SLS related Test 5 of 7 for RS-25 0525 about to occur.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/17/2015 07:30 PM
Fire!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 07/17/2015 09:16 PM
Pedal to the Metal – RS-25 Engine Revs Up Again
Published on 17 Jul 2015

In auto racing parlance, NASA engineers put the “pedal to the metal” during a July 17 test of its Space Launch System (SLS) RS-25 rocket engine at Stennis Space Center. During a 535-second test, operators ran the RS-25 through a series of power levels, including a period of firing at 109 percent of the engine’s rated power. Data collected on performance of the engine at the various power levels will aid in adapting the former space shuttle engines to the new SLS vehicle mission requirements, including development of an all-new engine controller and software. Four RS-25 engines will use the added performance to help power the SLS core stage during launch. The SLS is being developed to carry humans deeper into space than ever before, to such destinations as an asteroid and Mars. When fully developed, the heavy-lift version of the spacecraft will be the largest, most powerful rocket ever built. Prior to the first launch – Exploration Mission-1, the SLS first stage will be tested on the B-2 Test Stand at Stennis, which will involve simultaneously firing its four RS-25 engines just as they would during an actual launch. Modifications are continuing to prepare the B-2 stand for the test series. Meanwhile, during the July 17 development engine test on the nearby A-1 Test Stand, operators continued to collect data on engine performance under various conditions. They also collected data on performance of the new controller, which monitors and controls engine performance. Aerojet Rocketdyne of Sacramento, California, is the prime contractor for the RS-25 engine work. Two additional tests of the RS-25 engine are planned before the current test series concludes by early September and a new test series begins on four engines for a future flight.

[youtube]AGWnhBv8wS4[/youtube]
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/18/2015 02:01 AM
Article for this test:
http://www.nasaspaceflight.com/2015/07/rs-25-fired-109-percent-static-fire/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Jet Black on 07/20/2015 08:47 AM
Congrats to NASA on almost, but not quite, turning their rocket up to 11! Is this the expected limit that the engine can be turned up to or could they push even harder if they wanted?
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: dbush on 07/20/2015 09:23 AM
Does anybody know what the boom or platform seen moving out of shot between 0:38 and 0:41 is for?

Another question, do these test stands have ROFI sparklers to burn off hydrogen or is that not an issue due to the nature of the stand? Presumably the actual SLS will require them?
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 07/20/2015 09:40 AM
Congrats to NASA on almost, but not quite, turning their rocket up to 11! Is this the expected limit that the engine can be turned up to or could they push even harder if they wanted?

During the SSME development program, Block II configuration engines were tested at 111% of Rated Power Level (RPL) - total accumulated run time from all tests at this level was around 110 minutes.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/11/2015 09:29 PM
NASA TV to Air Test of Space Launch System Engine

NASA Television will broadcast live coverage Thursday, Aug. 13 of the penultimate hot fire test of an RS-25 engine. This is one of four engines that will power the core stage of NASA’s new Space Launch System (SLS), and carry the agency’s Orion crew capsule as part of the journey to Mars and other deep space destinations.

From 11 a.m. to 12:30 p.m. EDT, NASA TV will broadcast a series of conversations at Stennis among media, social media followers, engineers and managers discussing the SLS rocket, Orion, ground systems, and the RS-25 engine. Viewers can ask questions via social media using the hashtag #askNASA.

Coverage of the 5 p.m. engine test will begin at 4:30 p.m. The test will last 535 seconds, the amount of time the engines will fire during an actual launch. Both programs can be viewed on NASA TV-1, the public channel for the space agency, and NASA TV-2, the education channel.

The test will take place on the historic A-1 test stand at NASA’s Stennis Space Center in Mississippi and is part of a series designed to put the upgraded former space shuttle main engines through the rigorous temperature and pressure conditions they will experience during a launch.

The tests also support the development of a new controller, or “brain,” for the engine, which monitors engine status and communicates between the vehicle and the engine, relaying commands to the engine and transmitting data back to the vehicle. The controller also provides closed-loop management of the engine by regulating the thrust and fuel mixture ratio while monitoring the engine's health and status.

For NASA TV streaming video, downlink and scheduling information, visit:

http://www.nasa.gov/nasatv

For more information about NASA’s Space Launch System, visit:

http://www.nasa.gov/exploration/systems/sls/rocket.html

-end-

http://www.nasa.gov/press-release/nasa-tv-to-air-test-of-space-launch-system-engine

Photo Credit:
During a 535-second test on July 17, 2015, operators ran the RS-25 through a series of power levels, including a period of firing at 109 percent of the engine’s rated power. Data collected on performance of the engine at the various power levels will aid in adapting the former space shuttle engines to the new SLS vehicle mission requirements, including development of an all-new engine controller and software.
Credits: NASA/Stennis
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/12/2015 10:54 PM
Testing the Most Powerful Engine for NASA’s Space Launch System

Published on Aug 12, 2015
Engineers at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, talk about the current test series for the RS-25 engine on the A-1 test stand. Four RS-25 engines and twin solid rocket boosters will power NASA’s new rocket, the Space Launch System, on deep space missions, including to an asteroid and ultimately to Mars. The RS-25, previously used on the space shuttle, is being modified for SLS specifications, including a higher thrust level and new engine controller unit.

https://www.youtube.com/watch?v=oyWEMMEESfA
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 12:58 AM
Philip Sloss is at Stennis for Thursday's test and interviewed RS-25 managers to create this feature:
http://www.nasaspaceflight.com/2015/08/sls-test-stennis-team-overview-rs25-ignition/

Will give it a standalone as it's lots of interesting quotes.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: John44 on 08/13/2015 05:35 PM
NASA RS-25 Test Social.
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&view=article&id=9555
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Calphor on 08/13/2015 06:16 PM
Waiting to see the RS-25 test today. Looking forward to seeing the test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:32 PM
Live!

Wow, I love their accents!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:37 PM
This has turned into one of those NASA Edge shows. Will wait for some actual updates - i.e the static fire.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:40 PM
"We're creating the core with..." Todd May.

"That's aweeeesome" - NASA Edge.

"....friction stir welding" - Todd May.

"I'm sold"  - NASA Edge.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SoulWager on 08/13/2015 08:43 PM
The team did an AMA yesterday https://www.reddit.com/r/IAmA/comments/3gqxfb/were_engineers_on_the_team_testing_the_rs25/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:47 PM
Nice vantage point:
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:55 PM
T-5 mins.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:56 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 08:59 PM
60 seconds.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:00 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:00 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:02 PM
Ignition!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:03 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:03 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:04 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:05 PM
MaxQ! ;)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:05 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:07 PM
Coming to the end.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:08 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:10 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/13/2015 09:11 PM
And complete!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Mapperuo on 08/13/2015 09:21 PM
https://www.youtube.com/watch?v=nAIZKX9wcqc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: John44 on 08/13/2015 09:31 PM
NASA RS-25 Test
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&view=article&id=9556
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: jacqmans on 08/14/2015 07:53 AM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 08/14/2015 08:21 AM
Countdown to Deep Space Continues with Latest RS-25 Test
Aug. 13, 2015 (Last Updated: Aug. 14, 2015) Editor: Jennifer Harbaugh

NASA’s countdown to deep space continued today with a 535-second test of its Space Launch System (SLS) RS-25 rocket engine to collect engine performance data at NASA's Stennis Space Center near Bay St. Louis, Mississippi. SLS will launch astronauts in the Orion spacecraft on missions to deep space and eventually on the journey to Mars. Operators on the A-1 Test Stand at Stennis are conducting the test series to qualify an all-new engine controller and put the upgraded former space shuttle main engines through the rigorous temperature and pressure conditions they will experience during a SLS mission.

One final test of this RS-25 developmental engine is planned in this series; testing of flight engines begins later this fall.

More than 1,200 people, including elected officials and community leaders, media and social media representatives, and NASA and contractor employees and family members viewed the test. Guests saw Stennis facilities and test stands, the Aerojet Rocketdyne engine assembly facility, and the Pegasus barge that will transport the SLS core stage from NASA's Michoud Assembly Facility in New Orleans to Stennis for testing then to Kennedy Space Center in Florida for launch.

An initial 70-metric-ton (77-ton) SLS configuration will use four RS-25 engines for the core stage, along with two five-segment solid rocket boosters, providing more lift to orbit than any current launch vehicle. The core stage for the first SLS and Orion integrated flight– Exploration Mission-1 – also will be tested at Stennis. That test will involve simultaneous firing of the four RS-25 engines just as during an actual launch.

The RS-25 engine gives SLS a proven, high performance, affordable main propulsion system for deep space exploration. It is one of the most experienced large rocket engines in the world, with more than a million seconds of ground test and flight operations time. Aerojet Rocketdyne of Sacramento, California, is the prime contractor for the RS-25 engine work.

http://www.nasa.gov/exploration/systems/sls/multimedia/countdown-to-deep-space-continues-with-latest-rs-25-test.html (http://www.nasa.gov/exploration/systems/sls/multimedia/countdown-to-deep-space-continues-with-latest-rs-25-test.html)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 08/14/2015 04:55 PM
Here's a video of 5 RS-25 tests at once.

http://www.youtube.com/watch?v=1PNkfNF13ls
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 08/27/2015 08:05 PM
Six-minute warning for Test 7, the final in this series, went out locally, as @NASAStennis Tweeted:
https://twitter.com/NASAStennis/status/636991722929684482
Quote
We just received the 6 minute notification! SSC employees eagerly anticipate the test! #SLSFiredUp
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 08/27/2015 08:07 PM
I'm late, test in progress:
https://twitter.com/NASAStennis/status/636992958026358785

(Tweeted photo from @NASAStennis attached.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 08/27/2015 08:10 PM
Heh, the wind direction gave them rain from the steam cloud this time:
https://twitter.com/NASAStennis/status/636993616821530624
Quote
The engine is bringing the rain!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/27/2015 08:23 PM
Test complete!

Here's Philip's article to mark the series and preview the next - plus more on the turnaround of the engine between test six and seven. Top work by Philip with the access and quotes.

http://www.nasaspaceflight.com/2015/08/rs-25-completes-test-series-next-engine/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/28/2015 12:11 AM
Seventh RS-25 Test Grand Finale for First Developmental Test Series

Published on Aug 27, 2015
NASA has completed the first developmental test series on the RS-25 engines that will power the agency’s new Space Launch System (SLS) rocket on missions deeper into space than ever before. The test series wrapped up Aug. 27 with a seventh hot fire test of a developmental RS-25 engine on the A-1 Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The test ran for a full-duration 535 seconds.

https://www.youtube.com/watch?v=GAIC4jnKl8s
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: iskyfly on 08/28/2015 02:21 AM
this probably belongs in a Q&A somewhere....
and is probably a very stupid question.

What is with all the free flowing gas above the bell? To me that indicates a leak and a loss of fuel. But I know it is nothing new and so there is probably a good reason for why it happens.

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: russianhalo117 on 08/28/2015 03:25 AM
this probably belongs in a Q&A somewhere....
and is probably a very stupid question.

What is with all the free flowing gas above the bell? To me that indicates a leak and a loss of fuel. But I know it is nothing new and so there is probably a good reason for why it happens.


that is condensing water that being rapidly chilled from a gas to a solid. what you are seeing is basically water ice sublimation across the bell in simplest terms.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: jacqmans on 08/28/2015 07:20 AM
August 27, 2015
RELEASE 15-178

NASA Concludes Series of Engine Tests for Next-Gen Rocket

NASA has completed the first developmental test series on the RS-25 engines that will power the agency’s new Space Launch System (SLS) rocket on missions deeper into space than ever before.

The test series wrapped up Thursday with a seventh hot fire test of a developmental RS-25 engine on the A-1 Test Stand at NASA’s Stennis Space Center in Bay St. Louis, Mississippi. The test ran for a full-duration 535 seconds.

“The completion of this test series is an important step in getting SLS ready for the journey to Mars,” said Steve Wofford, engines manager at NASA’s Marshall Space Flight Center in Huntsville, Alabama, where the SLS Program is managed for the agency. “The RS-25 engine gives SLS a proven, high performance, affordable main propulsion system. It is one of the most experienced large rocket engines in the world, with more than a million seconds of ground test and flight operations time.”

The series was designed to collect valuable data on performance of the RS-25 engine, a former space shuttle main engine operating at higher thrust levels in order to provide the power needed for the SLS vehicle. Of particular interest is data that will aid in development of a new engine controller, or “brain,” to monitor engine status and communicate programmed performance needs.

“These are extremely reliable engines. We are testing them again because we want to ensure that the engine performs as required with a new engine controller, higher propellant inlet pressures and lower temperatures that are part of the SLS design. We also want to mitigate any risks on the ground before flight,” Wofford said.

Four RS-25 engines will help power the SLS core stage during launch. Firing simultaneously at 109 percent of its operating level, the engines will provide approximately 2 million pounds of thrust. The engines will operate in conjunction with a pair of five-segment solid rocket boosters for a total of 8.4 million pounds of thrust to lift the initial 70-metric-ton (77-ton) SLS off the launch pad. The SLS eventually will evolve to a 130-metric-ton (143-ton) configuration that will enable missions to such deep space destinations as an asteroid and Mars.

Testing of RS-25 flight engines for the initial SLS missions will begin at Stennis this fall.  In addition to testing RS-25 flight engines, Stennis operators will employ their collective expertise to test the SLS core stage. The B-2 Test Stand at Stennis is being renovated to conduct tests on the SLS flight core stage prior to its first uncrewed mission. That testing will involve installing the flight stage on the stand and firing its four RS-25 engines simultaneously, just as during an actual launch.

“What a great time to be at Stennis,” Center Director Rick Gilbrech said. “When it comes to powering the future of the deep space exploration program for this country, this is the front lines, where we enable those missions to fly.”

The developmental tests began with a Jan. 9 hot fire and resumed in May after scheduled work was completed on the high-pressure industrial water system that provides the thousands of gallons of water needed during an engine test. Aerojet Rocketdyne of Sacramento, California, is the prime contractor for the RS-25 engine work.

“This was a great test series for Stennis,” said Ronnie Rigney, RS-25 project manager at Stennis. “Our teams built up a lot of history with space shuttle main engines and were able to use that expertise to meet very challenging test specifications for the RS-25. The testing done here will help ensure the engines perform as needed during actual SLS missions.”

For more information about SLS, visit:

http://www.nasa.gov/sls
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: robertross on 08/30/2015 12:00 AM
Test complete!

Here's Philip's article to mark the series and preview the next - plus more on the turnaround of the engine between test six and seven. Top work by Philip with the access and quotes.

http://www.nasaspaceflight.com/2015/08/rs-25-completes-test-series-next-engine/

Fabulous article Philip, thanks!

What I would give to witness that test (of my favourite engine) - maybe one day...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 11/04/2015 09:03 PM
Getting Ready to Fly
November 4, 2015 Editor: LaToya Dean

NASA took the next big step on its Journey to Mars on Nov. 4 by placing the first RS-25 flight engine, engine No. 2059, on the A-1 Test Stand at Stennis Space Center. The engine will be tested in the first part of 2016 to certify it for use on NASA’s new Space Launch System (SLS). The SLS vehicle is being developed in two versions to return humans to deep space. The “Block 1” version of the SLS vehicle is set to fly its first uncrewed mission in 2018. The “Block 2” heavy-lift version will be ready for flight later and will be the largest, most powerful rocket ever built, capable of carrying humans on missions to Mars. The core stage of both SLS configurations will be powered by four RS-25 engines, all tested at Stennis Space Center. The core stage for the 2018 SLS flight – Exploration Mission-1 – also will be tested at Stennis. Testing will involve installing the flight stage on the B-2 Test Stand and firing its four RS-25 engines simultaneously, just as during an actual launch. The SLS Program has an inventory of 16 RS-25 flight engines, built by Aerojet Rocketdyne of Sacramento, California. The engines are available for the first four SLS missions, and two development engines are available for ground tests. These engines are being adapted to SLS performance requirements, including improvements like nozzle insulation and a new electronic controller.

http://www.nasa.gov/image-feature/getting-ready-to-fly (http://www.nasa.gov/image-feature/getting-ready-to-fly)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 11/24/2015 03:46 PM
As reported by here ages ago....

http://www.nasa.gov/press-release/nasa-awards-contract-to-restart-development-of-engines-to-power-agency-s-journey-to

(Posts relating to this moved to the discussion thread).
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/26/2016 05:15 PM
Article for the restart of testing and Aerojet Rocketdyne comments:

http://www.nasaspaceflight.com/2016/01/sls-engine-tests-ar-focus-rs-25/

Thanks to L2 member Hog for excellent translation of the test path for the engines.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 03/08/2016 11:41 PM
NASA Prepares to Fly – First RS-25 Flight Engine Test Set for March
S16-021 - March 8, 2016 - Valerie Buckingham, Stennis Space Center

It is business as usual as NASA engineers prepare for an upcoming RS-25 rocket engine test at Stennis Space Center. They are well-versed on all of the pre-test work to be done, having conducted a very successful series of tests on an RS-25 developmental engine just last year.

Nevertheless, the lead-up to this March 10 engine test on the A-1 Test Stand at Stennis has a very different – and exciting – feel about it.

This RS-25 engine will fly.

“Every test is important, but there really is a different energy level associated with flight engines,” said Ronnie Rigney, RS-25 project manager at Stennis. “It’s hard to describe the feeling you get knowing you’re going to see that engine lift off into the sky one day soon. It’s a very exciting time for all of us here.”

The flight certification test of RS-25 engine No. 2059 marks a major milestone in NASA’s return to deep-space exploration and its journey to Mars. Four RS-25 engines – all tested at Stennis – will help power the core stage of NASA’s new rocket, the Space Launch System (SLS), being built to carry humans on future deep-space missions.

The RS-25 engines used on the initial SLS missions are flight engines remaining from the Space Shuttle Program. The engines are among the most proven in the world, having logged more than 1 million seconds of hotfire time during ground tests and 135 space shuttle missions. For the SLS vehicle, the engines will be fired at 109 percent thrust level. Together, four SLS engines will provide more than 2 million pounds of thrust and operate in conjunction with a pair of solid rocket boosters to power the SLS launch to space.

The RS-25 engine gives SLS an experienced, high performance main propulsion system for deep space exploration, said Steve Wofford, SLS engines manager. “This year is all about collecting the data we need to adapt these proven engines for SLS’s first flight.”

The early SLS flights are focused on developing the capabilities needed to send humans to an asteroid by 2025 and to Mars in the 2030s. The SLS Block I configuration will have a minimum 70-metric-ton (77-ton) lift capability and be powered by twin boosters and four RS-25 engines. The next planned upgrade of SLS, Block 1B, would use a more powerful exploration upper stage for more ambitious missions with a 105-metric-ton (115-ton) lift capacity. Block 2 will add a pair of advanced solid or liquid propellant boosters to provide a 130-metric-ton (143-ton) lift capacity. In each configuration, SLS will continue to use the same core stage and four RS-25 engines. In that final version, SLS will be the most powerful rocket in the world.

NASA conducted a series of RS-25 developmental tests last year at Stennis to validate the capabilities of a new controller – or “brain” – for the engine and to verify the different operating conditions needed for the SLS vehicle. The test series concluded in August; removal of the developmental engine from the A-1 stand cleared the way for installation of flight engine No. 2059.

After testing is completed, that engine is scheduled to fly on the second SLS exploration mission (EM-2), planned as the first crewed flight of the new space vehicle. It is expected to carry four astronauts into lunar orbit to test key elements of the spacecraft.

“This is what the testing we do is all about – preparing engines to fly into space,” Stennis Space Center Director Rick Gilbrech said. “You can’t help but be excited about the test on A-1, especially when you realize that the engines that carried us to the moon and that carried astronauts on 135 space shuttle missions were tested on this very same stand. We’re just adding to a remarkable history of space exploration.”

There are more chapters to come.

Following the March 10 firing, Stennis will continue to test RS-25 flight engines and conduct a development engine series to test new flight engine controllers.  In 2017, Stennis will also test fire the core stage ahead of SLS’s first flight, EM-1 mission. The testing will involve installing the core stage on the B-2 Test Stand and firing its four RS-25 flight engines at the same time.

In addition, NASA is working with Aerojet Rocketdyne, who built the RS-25 engine, to test new RS-25 engines being built for future missions.

“It is a great time to be on this integrated test team, which includes NASA, S3 (Syncom Space Services) and Aerojet Rocketdyne working together,” said Rigney. “We’re not just dreaming of the future. We’re enabling it to happen right now.”

http://www.nasa.gov/press-release/nasa-prepares-to-fly-first-rs-25-flight-engine-test-set-for-march (http://www.nasa.gov/press-release/nasa-prepares-to-fly-first-rs-25-flight-engine-test-set-for-march)

Photo caption:  RS-25 engine No. 2059 arrives at the A-1 Test Stand at Stennis Space Center on Nov. 4, 2015. NASA is scheduled to test the engine March 10. It will mark a major milestone as the first test of a RS-25 flight engine for the new Space Launch System, being developed to carry humans deeper into space than ever before, including to an asteroid and Mars.  Credits: NASA/SSC
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/09/2016 08:53 PM
Aerojet Rocketdyne Tweeted (https://twitter.com/AerojetRdyne/status/707298579560288257) a photo yesterday; not sure when it was taken.


It's at least 6 months old - they also posted it during the August 13, 2015 test (https://twitter.com/AerojetRdyne/status/631933302765588480 (https://twitter.com/AerojetRdyne/status/631933302765588480))

[and I don't think its a photo taken on the day of that test, does not match others from that day]
Thanks for checking -- I deleted my post.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/10/2016 02:48 PM
Awesome article by Philip Sloss, who interviewed Steve Wofford, SLS Liquid Engines Office at Marshall Space Flight Center in Alabama.

RS-25 veteran set for Static Fire ahead of SLS launch
https://www.nasaspaceflight.com/2016/03/rs-25-veteran-static-fire-ahead-sls-launch/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/10/2016 08:34 PM
@NASAStennis just tweeted a pic
https://twitter.com/NASAStennis/status/708042594211614721

(Does look like the water deluge is going...)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/10/2016 08:42 PM
https://twitter.com/NASAStennis/status/708045020901675008
Quote
Getting ready to test the RS25 flight engine. Things are about to get #SLSFiredUp in south Mississippi! @NASA_SLS

(Nasty line of storms still mostly off to the west...)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/10/2016 08:44 PM
In progress.
https://twitter.com/NASAStennis/status/708045653532737536
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Mammutti on 03/10/2016 10:09 PM
Quote
RS25 test fire went the full 500 second duration! #JourneytoMars

https://twitter.com/NASAStennis/status/708062726195691522
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/10/2016 10:23 PM
Quote
RS25 test fire went the full 500 second duration! #JourneytoMars

https://twitter.com/NASAStennis/status/708062726195691522
Thanks...adding the "orig" sized image from that Tweet...maybe we'll see s'more on Flickr...and hopefully video eventually.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 03/10/2016 11:01 PM
Engine Test Marks Major Milestone on NASA’s Journey to Mars
March 10, 2016 - LaToya Dean

NASA successfully tested the first deep space RS-25 rocket engine for 500 seconds March 10, clearing a major milestone toward the next great era of space exploration. The next time engine rocket engine No. 2059 fires for that length of time, it will be carrying humans on their first deep-space mission in more than 45 years.

"What a great moment for NASA and Stennis," said Rick Gilbrech, director of NASA's Stennis Space Center in Bay St. Louis, Mississippi. "We have exciting days ahead with a return to deep space and a journey to Mars, and this test is a very big step in that direction."

The hot fire marked the first test of an RS-25 flight engine for NASA's new Space Launch System (SLS), being built to carry humans on future deep-space missions, including an asteroid and Mars. Four RS-25 engines will help power the SLS core stage.

The engines used on initial SLS missions are flight engines remaining from the Space Shuttle Program, workhorse engines that are among the most proven in the world, having powered 135 space shuttle missions from 1981 to 2011. For the SLS vehicle, the engines will fire at 109 percent thrust level and provide a combined two million pounds of thrust.

"Not only does this test mark an important step towards proving our existing design for SLS's first flight," said Steve Wofford, engines manager at NASA's Marshall Space Flight Center in Huntsville, Alabama, where the SLS Program is managed for the agency. "But it's also a great feeling that this engine that has carried so many astronauts into space before is being prepared to take astronauts to space once again on SLS's first crewed flight."

NASA and Aerojet Rocketdyne, the prime contractor for RS-25 engine work, conducted a series of developmental tests on the RS-25 engine last year at Stennis, primarily to validate the capabilities of a new controller – or, "brain" – for the engine and to verify the different operating conditions needed for the SLS vehicle. Following today's firing, Stennis and Aerojet Rocketdyne will conduct a development engine series to test new flight engine controllers and will continue to test RS-25 flight engines.

In addition, the agency is preparing the B-2 Test Stand at Stennis to test the SLS core stage that will be used on the rocket's first flight, Exploration Mission-1. Testing will involve installing the flight core stage on the B-2 stand and firing its four RS-25 rocket engines simultaneously.

"One more powerful step forward accomplished on the SLS journey," said Ronnie Rigney, RS-25 project manager at Stennis. "It really feels great to be part of such an important program in our nation."

http://www.nasa.gov/press-release/engine-test-marks-major-milestone-on-nasa-s-journey-to-mars (http://www.nasa.gov/press-release/engine-test-marks-major-milestone-on-nasa-s-journey-to-mars)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Mammutti on 03/10/2016 11:09 PM
And we have video.
https://www.youtube.com/watch?v=njb9Z2jX2fA
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/14/2016 10:55 AM
Another cracking article from Philip incoming. He's interviewed NASA's Steve Wofford, manager of the SLS Liquid Engines Office at Marshall Space Flight Center in Alabama and they went technical again (which is how we like it). Less #journeytomars more "hardware" :)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 03:37 PM
PAO at Stennis says that the test is still 'on' for later today.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/14/2016 04:54 PM
And here's Philip's article!
https://www.nasaspaceflight.com/2016/07/engine-0528-rs-25-testing-sls/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 09:13 PM
Live video is provided here:

http://www.ustream.tv/channel/nasa-stennis
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 09:19 PM
"60 minute notification at 1545hrs"  on Live Stream video screen
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 09:45 PM
"30 minute notification at 16:41 HRS"

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 09:49 PM
Live video is provided here:

http://www.ustream.tv/channel/nasa-stennis
OK, saw the water deluge starting, so getting closer.  The sound is faint, so we may not get a warning that way...not sure.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 09:51 PM
"15 minute Notification at 16:49Hrs"
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 09:52 PM
Aspect ratio is off...the nozzle is not that squat...better than nothing, of course.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 09:59 PM
"6 minute notification at 1658 hrs" 
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:02 PM
Audio dropped out for me for a bit...sounds like they are working on it...might have missed sound of start of PSN-4...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:08 PM
Test Start Notification message no longer up, still waiting.....
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:12 PM
Yeah, wondering if they had to recycle.  I saw a 1-minute warning, but then the graphics were wiped shortly thereafter.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:16 PM
looks like the water suppression has also terminated.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:17 PM
Ah, there you go: Technical Hold.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:18 PM
ahh...theirs hope "technical Hold"
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:20 PM
waiting to see any updates posted on the NASA Stennis Twitter account:

https://twitter.com/NASAStennis
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:20 PM
Not sure how far back they'd have to recycle but an interesting question to ask...first have to troubleshoot and resolve whatever problem caused them to stop.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:34 PM
might be hope....

https://twitter.com/NASA_SLS/status/753718113116512256

Quote
NASA_SLSVerified account ‏@NASA_SLS  6m
The RS-25 is getting ready to rumble @NASAStennis! Quick facts on the engine: http://go.nasa.gov/1Ra69Rl  #SLSFiredUp
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 10:44 PM
This illustration might be better...

http://www.nasa.gov/exploration/systems/sls/multimedia/rs-25-engine-infographic.html
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:49 PM
OK, they've recycled.  Hopefully they'll give the same notifications as they count down.

These times are local -- CDT or GMT-5.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:53 PM
Already posting 6-minute warning...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:58 PM
Already dropped the graphics, so may be close...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 10:59 PM
Ignition.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 11:00 PM
Test Started
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 11:01 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/14/2016 11:02 PM
shut-down (premature ??)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 11:02 PM
Supposed to burn for 650 seconds...looked like they were down at 80%...cutoff way early, maybe four three and a half minutes duration.  These were prior to cutoff (obviously).
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: DaveS on 07/14/2016 11:05 PM
Yes, the throttle level got me too as well as the early cut-off.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 11:06 PM
Yes, the throttle level got me too as well as the early cut-off.
The former was expected (a lot of run time was at 80%, though I'm not sure that's what we were seeing), the cutoff was definitely well short of the plan.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 07/14/2016 11:07 PM
At that point I thought they were going to throttle back up, but no joy...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 11:13 PM
At that point I thought they were going to throttle back up, but no joy...
I wasn't watching the feed at the time, but heard the audio.  Hard to mistake the shutdown.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/14/2016 11:14 PM
Nothing from the official twitter accounts yet.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 07/14/2016 11:15 PM
Supposed to burn for 650 seconds...looked like they were down at 80%...cutoff way early, maybe four three and a half minutes duration.  These were prior to cutoff (obviously).
I concur with your correction of 3 minutes and bit per my quick look at my clock at the time Philip...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/14/2016 11:18 PM
Supposed to burn for 650 seconds...looked like they were down at 80%...cutoff way early, maybe four three and a half minutes duration.  These were prior to cutoff (obviously).
I concur with your correction of 3 minutes and bit per my quick look at my clock at the time Philip...
Thanks to catdlr spotting the UStream feed for us, I was able to set up an eleven-minute timer to start at ignition.  I stopped it after I heard/saw the cutoff.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/14/2016 11:34 PM
Yes, well done to Tony!

Philip's article updated, pending official comment.
https://www.nasaspaceflight.com/2016/07/engine-0528-rs-25-testing-sls/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/15/2016 12:56 AM
Got this from Stennis PAO a couple of minutes ago; not sure if this is in an official release yet:

Quote
Today at 5:57 p.m. (CST) RS-25 developmental engine number 0528 initiated a test firing. There was a minor issue with the test stand that triggered an early shutdown of the test. The test systems in place responded properly by shutting down the test in an orderly fashion.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/15/2016 01:04 AM
Got this from Stennis PAO a couple of minutes ago; not sure if this is in an official release yet:

Quote
Today at 5:57 p.m. (CST) RS-25 developmental engine number 0528 initiated a test firing. There was a minor issue with the test stand that triggered an early shutdown of the test. The test systems in place responded properly by shutting down the test in an orderly fashion.


Thanks Philip - added to your article:
https://www.nasaspaceflight.com/2016/07/engine-0528-rs-25-testing-sls/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/15/2016 02:03 AM
@NASAStennis also Tweeted out along the same lines a while back:
https://twitter.com/NASAStennis/status/753760142965997568

Quote
RS-25 developmental engine 0528 test shutdown early today due to a minor issue w/ the stand. Systems responded properly by doing so.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/15/2016 02:40 AM
There is a video of the test but it's now Private [Update] it's now available for viewing, per Psloss post below.

https://www.youtube.com/watch?v=elKXJhLSHxc?t=001

https://www.youtube.com/watch?v=elKXJhLSHxc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/15/2016 05:15 PM
Someone else posted video:
https://www.youtube.com/watch?v=YT4hKxTHZh4
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/16/2016 12:56 AM
There is a video of the test but it's now Private.
https://www.youtube.com/watch?v=elKXJhLSHxc?t=001
This was opened up to the public again...notes the duration of the test was 193 seconds:
Quote
A team of NASA, Aerojet Rocketdyne and Syncom Space Services engineers and operations conducted a test of RS-25 engine No. 0528 on July 14 on the A-1 Test Stand at Stennis Space Center. The test fell short of its scheduled 650 seconds. Initiated at 5:57 p.m. (CST), there was a minor issue with the test stand that triggered an early shutdown 193 seconds into the test. Facility control systems in place responded properly by shutting down the test in an orderly fashion. No issues were reported with the engine, and the next test is planned for August.

(The two videos appear to be the same content.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/16/2016 01:09 AM
A couple of quotes here, but I don't see any new details:
http://www.sunherald.com/news/local/counties/hancock-county/article89964077.html
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/19/2016 11:58 PM
From Jason Davis with The Planetary Society:
https://twitter.com/jasonrdavis/status/755535829368397824
Quote
NASA will retry RS-25 engine firing next week; no further info about test stand glitch but no damage to engine, no long-term sched. impact.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/23/2016 04:20 PM
Courtesy of NASA PAO, current plan is for follow-up hot-fire on Friday, the 29th.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/29/2016 02:04 PM
Courtesy of NASA PAO, current plan is for follow-up hot-fire on Friday, the 29th.


And an article from Philip for this test when they fire it up. We're waiting on an ETA and if they will live stream it again.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: russianhalo117 on 07/29/2016 03:54 PM
I checked the sites and SSC has not yet set up any live events for today. I will keep checking periodically.

Also, Chris this is the next test after this one:
Stennis Space Center ✔ @NASAStennis
LAST CALL: See progress on @NASA's #JourneyToMars and view a live engine tests on Aug. 17-18! Deadline TODAY: http://go.nasa.gov/2axIHUo .
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 07:02 PM
A couple of minutes ago...looks like relatively soon for readiness...
https://twitter.com/NASAStennis/status/759101134380335104
Quote
Beautiful day in South MS as we prepare for today's RS-25 test firing on the A-1 Test Stand!#SLSfiredUp

(I'm thinking we saw the last test live by a lucky coincidence...SSC channel is off the air right now.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 07:09 PM
https://twitter.com/NASAStennis/status/759103027068493825
Quote
Employees are briefed on test prep and @NASA's #JourneyToMars by Ronnie Rigney, RS-25 Project Manager. #SLSfiredUp

(So maybe a few minutes before ready...)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 07:13 PM
Underway.  Posted at 14:12 local; this was sometime after ignition.

https://twitter.com/NASAStennis/status/759104437101166592
Quote
Look at this engine go!! #SLSFiredUp
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/29/2016 07:14 PM
I checked the sites and SSC has not yet set up any live events for today. I will keep checking periodically.

Also, Chris this is the next test after this one:
Stennis Space Center ✔ @NASAStennis
LAST CALL: See progress on @NASA's #JourneyToMars and view a live engine tests on Aug. 17-18! Deadline TODAY: http://go.nasa.gov/2axIHUo .

Yea, I tried all these feeds with no luck.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 07:22 PM
Short video clip post at 14:21 local:

https://twitter.com/NASAStennis/status/759106571217543168
Quote
Here's a clip of the test happening now! @AerojetRdyne's RS-25 will power @NASA_SLS. #JourneyToMars #SLSFiredUp

(Edit: added video clip...checking with PAO on numbers.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/29/2016 07:34 PM
Nothing from Stennis since the above....so we don't know if it was a good test yet.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 07:37 PM
PAO confirms full 650-second duration; ignition was at 2:10 pm Central (local).

(Guessing a lot of folks are on their way back to their offices after the test.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/29/2016 07:38 PM
Excellent!

And the article, from Philip himself ;D

https://www.nasaspaceflight.com/2016/07/sls-engine-fired-previous-aborted-test/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 07/29/2016 09:34 PM
NASA release:
http://www.nasa.gov/image-feature/nasa-marches-on-with-test-of-rs-25-engine-for-new-space-launch-system

Video of test went up about the same time on YT:
https://www.youtube.com/watch?v=ISWVu8PPIUA?t=001

(Title: "NASA Marches on with Test of RS-25 Engine for New Space Launch System")
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Lewis007 on 07/30/2016 06:38 AM
Video of the July 29 engine test

https://www.youtube.com/watch?v=ISWVu8PPIUA

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: wally on 07/31/2016 08:09 AM
Did this specific engine (E0528) took part in a STS mission? Or it's just a development engine, meaning it's used just for testing? Its numbering doesn't match the other engines listed here (http://www.collectspace.com//review/sts133_ssmechart-lg.jpg) (by the way, does anyone got a newer version of that chart?).
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 07/31/2016 11:43 AM
Did this specific engine (E0528) took part in a STS mission? Or it's just a development engine, meaning it's used just for testing? Its numbering doesn't match the other engines listed here (http://www.collectspace.com//review/sts133_ssmechart-lg.jpg) (by the way, does anyone got a newer version of that chart?).

E0528 is a development engine only - no flight history.  An updated SSME Flight History was generated by member Colds7ream, and can be found here:

http://forum.nasaspaceflight.com/index.php?topic=17437.msg832031#msg832031 (http://forum.nasaspaceflight.com/index.php?topic=17437.msg832031#msg832031)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/03/2016 08:10 PM
Next RS-25 test mentioned in the following:

August 03, 2016
MEDIA ADVISORY M16-094
NASA Invites Media to Journey to Mars Showcase on Aug. 18


Media are invited Thursday, Aug. 18, to interview experts from across NASA and industry about the science, technology and human spaceflight activities that are making the agency’s Journey to Mars possible.

The day will begin at NASA’s Michoud Assembly Facility in New Orleans, where the core stage of the Space Launch System (SLS) rocket and parts of the Orion spacecraft are being manufactured, and will end the day at a test firing of SLS’s powerful RS-25 engine at the agency’s Stennis Space Center, near Bay St. Louis, Mississippi. Transportation will be provided for media travelling between Michoud and Stennis to cover both parts of this showcase event.

To participate, media must contact Kathryn Hambleton for credentials at 202-358-1100 or [email protected] no later than 5 p.m. EDT, Friday, Aug. 12.

NASA experts will be available for one-on-one interviews with media about technologies needed to explore the Red Planet, including SLS, Orion and ground systems operations, as well as habitat and lander development, landing site selection, propulsion, advanced manufacturing, robotic exploration, and more.

Media will have the opportunity to:

. get a behind-the-scenes look at what NASA is doing in science, technology, and human spaceflight to prepare for deep space travel
. view manufacturing of the core stage, the largest part of NASA's new deep space rocket
. see the next Orion structure being manufactured -- the Orion that will be used for structural testing of the design which will take humans beyond Earth orbit
. speak with representatives from NASA and industry partners creating the capabilities to send humans to Mars
. witness a firing of the RS-25 engine, part of the SLS core stage
. tour rocket engine facilities at Stennis
. visit the B-2 test stand that is being renovated for SLS core stage testing

NASA is on an ambitious Journey to Mars that includes sending humans to the Red Planet in the 2030s. The agency’s robotic spacecraft are leading the way on Mars with two active rovers, three active orbiters, the planned launch of the InSight lander in 2018, and development of the Mars 2020 rover. SLS and Orion will launch together, for the first time, in 2018 and be capable of sending humans farther from Earth than ever before, including to an asteroid and Mars.

For more information about NASA’s Journey to Mars, visit:

http://www.nasa.gov/journeytomars

-end-

Picture Credits: NASA
A liquid hydrogen tank weld confidence article (left) for the core stage of NASA’s new rocket, the Space Launch System, recently was completed on the Vertical Assembly Center at the agency’s Michoud Assembly Facility in New Orleans.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 08:48 PM
We'll cover the live coverage of the latest test (in an hour or so) in this thread. NASA TV are apparently showing it live.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: mrhuggy on 08/18/2016 09:45 PM
Marshall's Ustream has it up http://www.ustream.tv/channel/nasa-msfc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 09:57 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:01 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:02 PM
Amazing accent. Reminds me of those old Westerns on telly as a kid.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:07 PM
Earplugs? Really?
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:09 PM
Ignition!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:10 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:11 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:13 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 08/18/2016 10:15 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:15 PM
Test complete.

Short article:
https://www.nasaspaceflight.com/2016/08/rs-25-fires-up-sls-engine-test/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 08/18/2016 10:18 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:18 PM
Rare view of the prop tanks venting.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/18/2016 10:20 PM
Steve, who's always great for good quotes in Philip's articles. Top man.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Mapperuo on 08/18/2016 10:29 PM
https://www.youtube.com/watch?v=z-9CuNvMVsc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 08/21/2016 12:30 AM
Earplugs? Really?
This viewing area seems pretty close.  Attached a screenshot from Google Maps.  Purely subjective, but based on how much sound I could feel in my clothes, it was as loud or louder at that distance than the D4H launch I saw from the causeway.  It would be interesting to get a decibel reading for a test from there.  I would guess the earplugs are more for the several minutes at that level, at that distance.

Weather/atmospheric conditions also affect what we heard, but this test had a "busy" throttle profile (relatively speaking) and it did seem like I could hear some of that.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/22/2017 06:10 PM
Excellent interview and feature article for the latest test, via Philip Sloss.
https://www.nasaspaceflight.com/2017/02/rs-25-test-sls-team-waits-new-controllers/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/22/2017 08:49 PM
Ignition! https://www.facebook.com/NASASLS/videos/vb.161692063946619/1222554207860394/?type=3&theater
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/22/2017 08:49 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/22/2017 08:53 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/22/2017 08:54 PM
Shutdown!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 02/22/2017 08:57 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Jester on 02/22/2017 09:07 PM
video
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 02/22/2017 09:34 PM
video
Stennis PAO notes ignition was at 15:47 Central time and (as noted in the Facebook Live broadcast) ran for the planned 380 seconds.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 02/22/2017 11:46 PM
Couple of YouTube edits of the broadcast that look like they are trimmed to the hot-fire.  The top link is the slightly shorter Stennis edit, which includes their technical slate and gives us the test number.  (Although that could be deduced from previous tests.)

https://www.youtube.com/watch?v=fPd4KYG0aLY
https://www.youtube.com/watch?v=u4VRD5cTNE4
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 01:25 PM
Another test today. Philip Sloss with the overview!
https://www.nasaspaceflight.com/2017/03/rs-25-engine-controller-static-fire-test-stennis/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 01:34 PM
Asked about live coverage and the NASA_SLS Twitter feed has already noted it's via social media live-streaming, like last time:
https://twitter.com/NASA_SLS/status/844913908012011520

In addition to Facebook Live, I heard it will also be simulcast on the Marshall UStream and YouTube live channels.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 06:29 PM
I haven't audited the other links yet, but MSFC UStream went live recently:
http://www.ustream.tv/channel/nasa-msfc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 06:31 PM
YouTube live stream:
https://www.youtube.com/watch?v=Pi4uSpQpf3Y
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 06:34 PM
Does appear to still be tracking towards ignition at the top of the hour.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 06:51 PM
Heh, Chris gets NASA TV to go live:
https://twitter.com/NASASpaceflight/status/844998298226343936

Quote
RS-25 test will now be shown live on NASA TV, following the "immense pressure" of the #ShouldBeOnMainNASATVBecauseRS25IsGreat campaign 😉😅
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 06:52 PM
People power ;)

All seems on track.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 06:55 PM
Six minute notification and the sirens are going with the audio on...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 06:55 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 07:01 PM
Ignition!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 07:02 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 03/23/2017 07:04 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 07:07 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 03/23/2017 07:09 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 07:09 PM
Looks like cutoff was right on time at 500 seconds.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 03/23/2017 07:10 PM
Test complete.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 03/23/2017 07:12 PM
Shutdown
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Mapperuo on 03/23/2017 07:28 PM
Replay of the test:

https://www.youtube.com/watch?v=kMc0gVs0_FM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 07:56 PM
Double-checked with Stennis PAO and the test did start on-time and ran for the "flight duration" of 500 seconds, as planned.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 03/23/2017 10:27 PM
https://www.nasa.gov/centers/stennis/news/2017/NASA-Tests-New-Engine-Controller-for-First-Space-Launch-System-Flight

March 23, 2017

RELEASE S17-21
NASA Tests New Engine Controller for First Space Launch System Flight

NASA marked a critical milestone March 23 with a test of the first RS-25 engine controller that will be used on the first flight of the new Space Launch System (SLS), the world’s most powerful rocket.

The new controller or “brain” has the electronics that operate the engine and communicate with the SLS vehicle.  Engine Controller Unit-2 (ECU-2) was installed on RS-25 development engine No. 0528 and test fired for 500 seconds on the A-1 Test Stand at Stennis Space Center near Bay St. Louis, Mississippi. Once test data is certified, the engine controller will be removed and installed on one of four flight engines that will help power the first integrated flight of SLS and the Orion spacecraft.

This year, two more engine controllers for the first SLS mission will be tested on this development engine at Stennis, and then installed on flight engines. The fourth controller will be tested when NASA tests the entire core stage during a “green run” on the B-2 Test Stand at Stennis. That testing will involve installing the core stage on the stand and firing its four RS-25 flight engines simultaneously, as during a mission launch.

“This an important – and exciting – step in our return to deep space missions,” Stennis Director Rick Gilbrech said. “With every test of flight hardware, we get closer and closer to launching humans deeper into space than we ever have traveled before.”

The RS-25 engines that will help power the SLS vehicle on its first flights are former space shuttle main engines, built for NASA by Aerojet Rocketdyne. Four engines will fire simultaneously to provide 2 million pounds of thrust and operate in conjunction with a pair of solid rocket boosters to power the SLS launch.

Space shuttle main engines were tested extensively and used to power 135 missions from 1981 to 2011. For SLS, the engines have been upgraded to operate at a higher level and under different conditions, and the flight controller was one of the critical new parts of the engine to enable performance under these new conditions.

Prior to a flight, performance specifications, such as the percentage of thrust needed, are programmed into the controller. The controller then communicates the specifications and monitors engine conditions to ensure they are being met, controlling such factors as propellant mixture ratio and thrust level.

Testing for the upgraded engines and new controllers is vital to ensure they will perform as needed within the operating parameters. For instance, space shuttle main engines operated at a maximum of 104.5 percent of power level capability. For SLS flights, the RS-25 engines must fire at 109 percent of capability. The engines also will operate with colder liquid oxygen and engine compartment temperatures, higher propellant pressure and greater exhaust nozzle heating.

“The importance of this testing cannot be overemphasized,” A-1 Test Director Jeff Henderson said. “Each test has specific objectives to determine how the engine will respond. The goal is to learn as much as we can about the performance of the engine.”

RS-25 testing at Stennis is conducted by a team of NASA, Aerojet Rocketdyne and Syncom Space Services engineers and operators. Aerojet Rocketdyne is the prime contractor for RS-25 engines. Syncom Space Services is the prime contractor for Stennis facilities and operations.

For more about the SLS rocket, visit:

http://www.nasa.gov/sls.

For more information about Stennis Space Center, visit:

www.nasa.gov/centers/stennis/.

Valerie Buckingham
Stennis Space Center
228-688-3898
[email protected]

Kim Henry                                                                                                       
Marshall Space Flight Center, Huntsville, Ala.
256-544-0034
[email protected]

Last Updated: March 23, 2017
Editor: LaToya Dean
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 11:58 AM
Another SLS RS-25 Static Fire at Stennis today. FM3 on E0528, new ECU (Engine Controller Unit) testing. Should be some form of live webcast.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 06:17 PM
Article for the test - by Philip Sloss:
https://www.nasaspaceflight.com/2017/05/testing-controller-rs-25-hot-fire-test-sls-stennis/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 07:02 PM
Not getting quite the level of updates as in L2, but Stennis PAO said the current target time is 3:10 pm Central, 20:10 UTC.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 07:40 PM
https://twitter.com/NASAStennis/status/864565745916809217

14:38 local:
Quote
Beautiful day for an RS-25 engine test! We just received 30-minute notification!

...so maybe 15:08 or 15:09 local (20:08 or 20:09 UTC)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 07:51 PM
https://twitter.com/NASA_Marshall/status/864568446507524103

A bit more precise about the notification time:
Quote
Beautiful day for a @NASA_SLS RS-25 engine test! At 2:36pm CT, we received the 30-minute notification!

So far, the only advertised place that will be broadcasting is Facebook Live.
https://www.facebook.com/NASAStennis/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 07:56 PM
OK, and NASA TV:
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 07:58 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:01 PM
Walking backwards a few minutes.  The stream I have here is sluggish, so expecting my posts to lag.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:05 PM
Standing by
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:09 PM
I can't get a solid connection, only seeing things sporadically.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 08:10 PM
Same here, but no firing yet.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 08:12 PM
Very bad lags, but still no firing.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Flying Beaver on 05/16/2017 08:14 PM
Very bad lags, but still no firing.

Exact same here. Nasty buffering on NASA's side.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:15 PM
Very bad lags, but still no firing.

Exact same here. Nasty buffering on NASA's side.
Yup...almost wonder if they had to recycle, but I didn't see a 1-minute/60-second warning...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Flying Beaver on 05/16/2017 08:16 PM
Facebook Live is up @NASAStennis. Solid stream.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Flying Beaver on 05/16/2017 08:18 PM
The caption for the FB live stream seems to be the post firing press release...?  :P

Quote
NASA engineers successfully conducted the second in a series of RS-25 flight controller tests May 16, 2017, stepping closer to deep-space exploration with the world’s most powerful rocket. The 500-second test on the A-1 Test Stand at NASA’s Stennis Space Center in Mississippi marked another milestone toward launch of NASA’s new Space Launch System (SLS) rocket on its inaugural flight, known as Exploration Mission-1 (EM-1). The SLS rocket, powered by four RS-25 engines firing simultaneously, will provide two million pounds of thrust and work in conjunction with a pair of solid rocket boosters. The RS-25 engines for the initial flight are former space shuttle main engines, modified to perform at a higher level and with a new controller. The controller is the key modification to the engines.

Unless the stream is 10 minutes behind and it's already fired.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:20 PM
The caption for the FB live stream seems to be the post firing press release...?  :P
I think t That's premature.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: tvg98 on 05/16/2017 08:26 PM
"Test on Hold."
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Flying Beaver on 05/16/2017 08:26 PM
Oh.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:26 PM
Given the delay, makes some sense.

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Flying Beaver on 05/16/2017 08:27 PM
LOX venting from tank farm.

edit: Look at the NASA worm logo ;D
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:29 PM
Recycling (we saw this in one of the tests last year), but not sure to what...if they are going to make another run at ignition hopefully we get a time notification.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:36 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 05/16/2017 08:37 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 08:37 PM
Well that's not a scrub....yet
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:39 PM
L2 post adds that it's an instrumentation issue.  (Thanks for that update.)

(Guess I'm going to have to find out about limiting constraints one of these days... :) )
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 05/16/2017 08:45 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 08:55 PM
Not to jinx it, but the NASA TV YouTube stream seems better...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: DatUser14 on 05/16/2017 09:06 PM
NASA TV is now showing archival footage of some Mercury atlas flight
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 09:18 PM
Scrub likely?
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 09:26 PM
Scrub likely?
Definitely quiet.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/16/2017 09:32 PM
https://twitter.com/NASAStennis/status/864594258610802688

Largely repeating the FB post:
Quote
Today’s test is on hold. Engineers are working to get the engine to the right performance conditions for testing. We'll keep you updated.

Sounds like some out at the viewing site are returning to their office, but that's more of a tea leaf...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/16/2017 11:27 PM
I've totally lost my patience with their lack of updates and shaking the tree via Twitter. More on updates, less on trying to get the facebook "likes" quota up, please.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/17/2017 12:34 AM
Finally said it was scrubbed:
https://twitter.com/NASAStennis/status/864639762602307584

Quote
Today's RS-25 engine test was scrubbed due to a facility issue. No issues were reported with the engine, and the test will be rescheduled.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/23/2017 06:46 PM
Trying again, counting down! Nothing on the public side yet, but L2 side has this as a T-0 of 2:30 p.m. CDT.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/23/2017 07:44 PM
Copying over: PAO says no live coverage.

Edit: per L2 test got underway around the time of the original post.  Planned duration was 500 seconds, about what is planned for nominal/planned flight.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 05/23/2017 07:54 PM
Test complete!!

Philip's article updated:
https://www.nasaspaceflight.com/2017/05/testing-controller-rs-25-hot-fire-test-sls-stennis/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/23/2017 07:55 PM
Per L2, shutdown appeared to be on-time.  I'm asking PAO to confirm.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/23/2017 08:01 PM
Confirmed instead via L2 -- ignition at 14:43 CDT and actual duration was 500 seconds, as planned.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 05/23/2017 10:28 PM
Test video on YouTube:
https://www.youtube.com/watch?v=mAADl8lQ4Fc?t=001

https://www.youtube.com/watch?v=mAADl8lQ4Fc
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 12:37 PM
E0528 test today. Article from Philip Sloss incoming.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 01:17 PM
And here's Philip's article:
https://www.nasaspaceflight.com/2017/07/rs-25-hot-fire-sls-flight-engines-em-1/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:19 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:29 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:30 PM
15 minute notice, so on track for 45 mins past the hour.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:47 PM
IGNITION!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:54 PM
This test seems way over 500 seconds! :o
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/25/2017 07:55 PM
Shutdown!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 07/26/2017 05:09 AM
Testing a new engine controller system for the RS-25

NASA Stennis
Published on Jul 25, 2017


Engineers conduct the third in a series of RS-25 flight controller tests on July 25, 2017, for NASA’s Space Launch System (SLS) rocket. The more than 8 1/2 minute test on the A-1 Test Stand at NASA’s Stennis Space Center in Mississippi signaled another step toward the launch of NASA’s new Space Launch System (SLS). The SLS rocket, powered by four RS-25 engines, along with the Orion spacecraft will take astronauts in a new era of exploration beyond Earth’s orbit into deep space.

https://www.youtube.com/watch?v=6n6quVTC1h4?t=001

https://www.youtube.com/watch?v=6n6quVTC1h4

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/09/2017 01:57 PM
Article for another test today!

By Philip Sloss:
https://www.nasaspaceflight.com/2017/08/rs-25-another-controller-test-sls/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: john smith 19 on 08/09/2017 03:58 PM
Article for another test today!

By Philip Sloss:
https://www.nasaspaceflight.com/2017/08/rs-25-another-controller-test-sls/
A nice article but I'd like to see some details on what's actually inside these controllers.

The first generation units were built round a 16 bit processor for combat aircraft and plated wire memory of about 16KB.

The 2nd used twin Motorola 68000s but running on the same die due to problems with getting them to run in synchronization (AFAIK this was made on special order to NASA by Motorola)

So what's in this box? Power PC? ARM? SPARC? The first is available in rad hard space rated, the other two can be had as IP for inclusion to your own rad hard process or gate array or ASIC.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/09/2017 07:58 PM
Live:

http://www.ustream.tv/NASAHDTV
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: DaveS on 08/09/2017 07:59 PM
Live:

https://www.facebook.com/NASAStennis/videos/vb.134512156591701/1477065665669670/?type=3&theater
And NASA TV: https://www.youtube.com/watch?v=wwMDvPCGeE0
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/09/2017 08:02 PM
FIRING!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/09/2017 08:07 PM
Test stand venting.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 08/09/2017 08:10 PM
Edit
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/09/2017 08:11 PM
Shutdown!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 08/09/2017 08:50 PM
Looked good from here, thanks for the great article Philip! :)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/10/2017 03:38 AM
RS-25 Rocket Engine Test

NASA
Published on Aug 9, 2017


The 8.5-minute test conducted at NASA’s Stennis Space Center is part of a series of tests designed to put the upgraded former space shuttle engines through the rigorous temperature and pressure conditions they will experience during a launch. The tests also support the development of a new controller, or “brain,” for the engine, which monitors engine status and communicates between the rocket and the engine, relaying commands to the engine and transmitting data back to the rocket.

This video is available for download from NASA's Image and Video Library: https://goo.gl/1mNM3c

https://www.youtube.com/watch?v=cXgJVrmdYrY?t=001

https://www.youtube.com/watch?v=cXgJVrmdYrY
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/30/2017 06:05 PM
Another test today:
https://twitter.com/NASA_Marshall/status/902946559385534464
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: DaveS on 08/30/2017 07:13 PM
Another test today:
https://twitter.com/NASA_Marshall/status/902946559385534464
And NASA TV will cover the test as well with the coverage starting at 4 pm EDT.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/30/2017 08:09 PM
Firing up.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/30/2017 08:11 PM
Test complete.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Stardust9906 on 08/30/2017 08:15 PM
Shutdown
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: FutureSpaceTourist on 08/30/2017 09:21 PM
https://www.youtube.com/watch?v=g5BvriNNb64 (https://www.youtube.com/watch?v=g5BvriNNb64)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 08/31/2017 03:30 AM
contains some different views of the same test...

NASA Concludes Summer of RS-25 Testing

Quote
NASA Stennis
Published on Aug 30, 2017

NASA engineers closed a summer of hot fire testing Aug. 30 for flight controllers on RS-25 engines that will help power the new Space Launch System (SLS) rocket being built to carry astronauts to deep-space destinations, including Mars. The 500-second hot fire an RS-25 engine flight controller unit on the A-1 Test Stand at Stennis Space Center near Bay St. Louis, Mississippi marked another step toward the nation’s return to human deep-space exploration missions.

https://www.youtube.com/watch?v=yIqjsYXesao?t=001

https://www.youtube.com/watch?v=yIqjsYXesao
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 09/27/2017 10:47 AM
https://www.nasa.gov/centers/stennis/news/2017/Public-Invited-to-Stennis-Space-Center-Open-House-Engine-Test-Viewing (https://www.nasa.gov/centers/stennis/news/2017/Public-Invited-to-Stennis-Space-Center-Open-House-Engine-Test-Viewing)

Public Invited to Stennis Space Center Open House/Engine Test Viewing
RELEASE S17-070, Sept. 26, 2017

The public is invited to attend a Founder’s Day Open House on Oct. 19, 2017, at NASA’s Stennis Space Center. The day’s activities will include an opportunity to view a test firing of an RS-25 flight engine.

The theme for the event is “SSC – 56 Years of Making Fire and Rain!” to commemorate the anniversary of the rocket engine test site. NASA announced plans on Oct. 25, 1961, to build a site in south Mississippi for testing the Apollo Program rocket stages that carried humans to the moon.

Security gates will be open for access to the site from 11 a.m. to 1:30 p.m. Since all activities will be located within the Stennis test complex area, only U.S. citizens age 10 or older will be allowed to participate.

Open house activities – including activities, exhibits, demonstrations and speakers – will be hosted by participating Stennis agencies prior to an afternoon test of RS-25 flight engine No. 2063 on the A-1 Test Stand. The engine is being tested for use by NASA’s new Space Launch System (SLS), being built to carry humans to deep-space destinations, including Mars. It is scheduled to be one of the four engines that will help power the launch of SLS on Exploration Mission-2, which will be the first flight of the new rocket to carry humans.

Food and drinks will be available for purchase. Personal coolers will not be allowed on site. Participants may bring collapsible chairs that are bagged and can be carried in one’s lap on the bus.

A limited number of free Open House tickets are available online at: https://ssc-open-house.eventbrite.com (https://ssc-open-house.eventbrite.com). Each participant must obtain a ticket to gain entry to the site. In addition to the pass, participants age 16 or older must show a picture ID (driver’s license or passport) for entry.

On Oct. 19, participants should proceed to either the south or north security gates at Stennis Space Center. Once cleared for entry, they will be directed to a central parking location, where buses will transport them into the test complex area.

For additional information about Open House, contact the Office of Communications at:

[email protected] or 228-688-3333

For information about Stennis Space Center, visit:

http://www.nasa.gov/centers/stennis/ (http://www.nasa.gov/centers/stennis/)

Media members wishing to attend the event should contact NASA News Chief Valerie Buckingham at 228-688-3898 by noon Wednesday, Oct. 18, to arrange for security clearance and escort.

Valerie Buckingham
Stennis Space Center
228-688-3898
[email protected]
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 10/04/2017 10:10 AM
‘Two For the Show’ – NASA Installs 2nd RS-25 Flight Engine for Testing
LaToya Dean - October 3, 2017

RS-25 flight engine E2063 is delivered and lifted into place onto the A-1 Test Stand at Stennis Space Center on Sept. 27 in preparation for an Oct. 19 hotfire test. Once tested and certified, the engine is scheduled to help power NASA’s new Space Launch System (SLS) on its Exploration Mission-2 (EM-2), which will be the first flight of the new rocket to carry humans. The hotfire test is planned during a public Founders Day Open House event at Stennis, giving thousands of visitors the chance to view a flight engine test in person. The E2063 engine is the second SLS flight engine tested at Stennis. The E2059 engine was tested on the A-1 stand on March 10, 2016, also for use on the EM-2 flight. Stennis has been testing new flight engine controllers for use by engines on both the Exploration Mission-1 and EM-2 launches of the SLS rocket as well. It also will test the SLS core stage that will fly on the EM-1 mission. The SLS is being built to carry humans to deep-space destinations, including Mars.

Image Credits: NASA/SSC

https://www.nasa.gov/image-feature/two-for-the-show-nasa-installs-2nd-rs-25-flight-engine-for-testing (https://www.nasa.gov/image-feature/two-for-the-show-nasa-installs-2nd-rs-25-flight-engine-for-testing)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 10/24/2017 09:52 PM
   October 24, 2017
CONTRACT RELEASE C17-037
NASA Awards Multiple Construction Contracts

NASA has awarded 24 Multiple Award Construction Contract Two (MACC-II) contracts to 20 small businesses and four large firms for general construction services at NASA’s Stennis Space Center in Bay St. Louis, Mississippi, and several other agency locations.
The MACC-II is a regionalized Indefinite Delivery/Indefinite Quantity (IDIQ) contract vehicle for small and large general construction projects. It has an anticipated value not to exceed $3 billion during an eight-year ordering period. IDIQ construction contracts were awarded in six categories: woman-owned small business; historically underutilized business zone; service-disabled veteran-owned small business; 8(A) Business Development Program; small business; and full and open unrestricted awards. The 20 small business set-aside contracts awards are part of U.S. Small Business Administration efforts to help small disadvantaged companies compete in the marketplace. Firm fixed price task orders will be issued under the MACC-II.
MACC-II project work includes, but is not limited to, alteration, modification, maintenance and repair, demolition, design-build and new construction of buildings, facilities and real property at Stennis; NASA’s Johnson Space Center in Houston, including White Sands Test Facility near Las Cruces, New Mexico; NASA’s Kennedy Space Center in Florida; and NASA’s Marshall Space Flight Center in Huntsville, Alabama, including Michoud Assembly Facility in New Orleans. Other NASA centers and federal tenants at NASA facilities may use MACC-II with approval of the Stennis procurement officer.
Contract awardees include the following companies:
Women-Owned Small Business Awards
·      ELCI Construction Group Inc., North Miami, Florida

·      Odyssey International, Inc., Chambersburg, Pennsylvania

·      Diversified Construction of Oklahoma Inc., Edmond, Oklahoma
HUBZone Awards
·      Healtheon, New Orleans

·      Weldin Construction, LLC, Omaha, Nebraska

·      Pontchartrain Partners, LLC, New Orleans

·      Civil Works Contracting, Wilmington, North Carolina

Service-Disabled Veteran-Owned Awards
·      ESA South, Inc., Cantonment, Florida

·      Advon, Tallahassee, Florida

·      Birmingham Industrial Construction (BIC), Alabaster Alabama

·      Firewatch Contracting of FL, LLC, Tampa, Florida

8(a) Awards
·      Silver Mountain Construction, Jacksonville, Florida

·      Drace Construction Corp., Ocean Springs, Mississippi

·      Orocon Construction LLC, Biloxi, Mississippi

·      CCI Energy and Construction Services, LLC, Shalimar, Florida

Small Business Awards
·      A&H Ambica JV, LLC, Livonia, Michigan

·      MOWA Barlovento JV-2, Gautier, Mississippi

·      Southeast Cherokee Construction, Inc., Montgomery, Alabama

·      SES Construction and Fuel Services LLC, Oak Ridge, Tennessee

Full and Open Unrestricted Awards
·      Brasfield & Gorrie General Contractors, Birmingham, Alabama

·      BL Harbert International, LLC, Birmingham, Alabama

·      Caddell Construction Co., Montgomery, Alabama

·      WG Yates & Sons Construction Company, Biloxi, Mississippi

For more information about NASA and agency programs, visit:
https://www.nasa.gov
For more information about Stennis Space Center, visit:
https://www.nasa.gov/stennis

-end-
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 11/30/2017 01:43 PM
At MAF, but heavily related and includes Stennis references:
https://www.nasaspaceflight.com/2017/11/maf-engine-installation-rs-25-pathfinder/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: mainengine on 11/30/2017 06:02 PM
Are they sure about Engine 2107 is the pathfinder engine ?
Is there a Nasa-Source ?
Thought 2107 ist still in Florida beside Shuttle Atlantis ...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 06:29 PM
New test today with a new phase of testing!

RS-25 heads into next phase of hot fire testing with 3D printed Pogo
https://www.nasaspaceflight.com/2017/12/rs-25-next-phase-testing-stennis-hot-fire/

- By Philip Sloss.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 07:29 PM
15 mins. Looks like they are forcing everyone on to Facebook as they've taken down the Ustream option...

http://www.ustream.tv/channel/nasa-stennis
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 07:41 PM
NASA TV!
http://www.ustream.tv/nasahdtv
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 07:46 PM
IGNITION!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 07:49 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 07:55 PM
Test complete!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 12/13/2017 08:20 PM
SLS RS-25 Engine Test, 13 December 2017
https://www.youtube.com/watch?v=-w-GJqyBBMw
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 12/13/2017 09:23 PM
Article updated. The test did not run through to full duration. Facility issue caused an abort with 70 seconds to go. Not a big issue. Engine not at fault and all objectives completed.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 04:04 PM
4pm Eastern on Tuesday for the next test!

Article by Philip Sloss:
https://www.nasaspaceflight.com/2018/01/rs-25-hot-fire-2018-testing-sls-engines/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 01/16/2018 07:58 PM
https://www.youtube.com/watch?v=E4yvQtsOSkk
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 08:07 PM
Still waiting for NASA TV to show anything.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 01/16/2018 08:41 PM
Livestream is now showing 4:45 PM EST.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 01/16/2018 08:49 PM
Update: the RS-25 Engine Test is now targeted for 3:57 p.m. (CST) #SLSFiredup

https://twitter.com/NASAStennis/status/953383167175614465
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 08:53 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 01/16/2018 08:53 PM
https://twitter.com/NASAStennis/status/953384501329252352

Update: the RS-25 Engine Test is now targeted for 4:04 p.m. (CST) #SLSFiredup
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 08:59 PM
Live:
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 09:08 PM
FIRE!

Wind direction, whoops!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: ChrisGebhardt on 01/16/2018 09:09 PM
I think I timed ignition at 17:06:00 EST.  (Maybe a few seconds after that.)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 09:10 PM
Never seen the wind cause this...
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: ChrisGebhardt on 01/16/2018 09:14 PM
I think I timed ignition at 17:06:00 EST.  (Maybe a few seconds after that.)

And I clocked shutdown at 17:12:00 EST.  So that would have been a full-duration run at the anticipated 6 minutes.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 01/16/2018 09:19 PM
GIFs of the test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 01/16/2018 09:21 PM
I think I timed ignition at 17:06:00 EST.  (Maybe a few seconds after that.)

And I clocked shutdown at 17:12:00 EST.  So that would have been a full-duration run at the anticipated 6 minutes.
Same, hand timed around the 365 seconds they were targeting.  Also could see the unusual low/high/low throttle curve.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 01/16/2018 09:30 PM
Amazing!

https://twitter.com/Navy_Nole/status/953390702569951242
 
@Navy_Nole
  11m11 minutes ago
Hey @NASASpaceflight, found some Rocket Rain for you! Had to process the photo pretty aggressively to make it stand out, but the test looked great from here!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 01/16/2018 09:42 PM
SLS RS-25 Engine Test, 16 January 2018
https://www.youtube.com/watch?v=c_Wc5R4TY5o
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 01/17/2018 03:07 PM
Amazing!

https://twitter.com/Navy_Nole/status/953390702569951242
 
@Navy_Nole
  11m11 minutes ago
Hey @NASASpaceflight, found some Rocket Rain for you! Had to process the photo pretty aggressively to make it stand out, but the test looked great from here!
Great article Philip, Thank you! :) We got rain from this test, expect a local monsoon for the "core test"... ;D
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 02/01/2018 12:09 AM
NASA TV coverage is currently scheduled to begin at 3:45 PM EST for the February 1st test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 03:14 PM
Article for this test, by Philip Sloss

https://www.nasaspaceflight.com/2018/02/rs-25-continue-3d-printed-pogo-testing/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 05:12 PM
Now 4:45 PM Central.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:17 PM
NASA:

UPDATE: The test of the RS-25 engine is now scheduled for 5:34pm ET.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:20 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: centaurinasa on 02/01/2018 09:24 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: centaurinasa on 02/01/2018 09:31 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:32 PM
Trying to get the kids excited....
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:37 PM
FIRING!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:37 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/01/2018 09:42 PM
Test complete.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 02/01/2018 09:44 PM
I timed it at exactly 365 seconds.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: MATTBLAK on 02/01/2018 09:47 PM
Great test! It went well. But if you ever watch these as live links on Farcebook; don't read the comments section... :(
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 02/01/2018 09:58 PM
I timed it at exactly 365 seconds.
I had 368s, good enough for government work... ;D
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 02/02/2018 04:56 AM
NASA Conducts 2nd RS-25 Engine Hot Fire of 2018


NASA Video
Published on Feb 1, 2018


A 365-second hot fire test on Feb. 1, 2018, at NASA’s Stennis Space Center in Mississippi marks the completion of “green run” testing, or flight certification, for all new RS-25 engine flight controllers slated for Exploration Mission-2, the first Space Launch System mission with astronauts on board. In addition to the flight controller, the Feb. 1 hot fire also marked the third test of a 3D printed pogo accumulator assembly for the RS-25 engine.

This video is available for download from NASA's Image and Video Library:
https://images.nasa.gov/details-NHQ_2018_0201_NASA%20Conducts%202nd%20RS-25%20Engine%20Hot%20Fire%20of%202018.html


https://www.youtube.com/watch?v=8ElM_4ZsH9k?t=001

https://www.youtube.com/watch?v=8ElM_4ZsH9k
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 02/20/2018 06:28 PM
Quote
It's that time again! Tune in tomorrow for a Facebook Live event of an RS-25 Engine Test tentatively targeted for 3 p.m. (CST) @ NASA's John C. Stennis Space Center #SLSFiredUp

https://twitter.com/NASAStennis/status/966027809977233410
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/21/2018 04:53 PM
Going for a record 113 percent of rated thrust today!

https://www.nasaspaceflight.com/2018/02/rs-25-hot-fire-sls-engine-113-percent/

By Philip Sloss
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Rocket Science on 02/21/2018 05:13 PM
Great article Philip! :) Do we have a time for today's test?
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: fthomassy on 02/21/2018 05:30 PM
Great article Philip! :) Do we have a time for today's test?
NASA TV shows coverage 4pm Eastern. IIRC they tend to fire on process rather than schedule so YMMV. The next program on NASA TV is 6pm.

Edit: Link (https://www.nasa.gov/multimedia/nasatv/schedule.html)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: ChrisGebhardt on 02/21/2018 07:20 PM
And the feed is up.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/21/2018 07:26 PM
Firing!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/21/2018 07:29 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 02/21/2018 07:31 PM
Shutdown.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 02/21/2018 11:56 PM
Replay.

RS-25 Engines Powered to Highest Level Ever During Stennis Test [live]


NASA Stennis
Streamed live Feb 21, 2018

Operators powered NASA’s Space Launch System (SLS) engine
to 113 percent thrust level, the highest RS-25 power level yet
achieved, for 50 seconds of a 260-second test on February 21
at Stennis Space Center. This was the third full-duration test
conducted on the A-1 Test Stand at Stennis this year.

https://www.youtube.com/watch?v=HHYJNmzdC90/t=001

https://www.youtube.com/watch?v=HHYJNmzdC90
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: catdlr on 05/18/2018 04:40 PM
Stennis Space Center Conducts Water Flow Test On The B-2 Test Stand

NASA Stennis
Published on May 18, 2018

Stennis Space Center completed a water flow test of the refurbished B-2 Test Stand on May 4, 2018.  This included both the deflector and the aspirator, individually and together.  This test stand is being prepared for the testing of the Space Launch System's booster core, which will utilize four RS-25 rocket engines.

https://www.youtube.com/watch?v=DIGfqT9AL6I?t=001

https://www.youtube.com/watch?v=DIGfqT9AL6I
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 07/11/2018 03:50 PM
FEATURE ARTICLE: RS-25 program gearing up for production restart, next test series -

https://www.nasaspaceflight.com/2018/07/rs-25-program-production-restart-test-series/

- By Philip Sloss
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: AnalogMan on 07/24/2018 11:27 PM
RS-25 Engine Installed On Stennis Space Center Stand For New Test Series
LaToya Dean - July 24, 2018

Aerojet Rocketdyne developmental RS-25 engine No. 0525 is readied for installation on the A-1 Test Stand at Stennis Space Center on July 23 in preparation for another new hotfire series to support NASA’s Space Launch System (SLS) Program.

Stennis is testing all RS-25 engines that will help power the SLS rocket, which is being built for missions beyond low-Earth orbit, carrying crew and cargo to the Moon and beyond. Four RS-25 engines, working in conjunction with a pair of solid rocket boosters, will power the SLS rocket at launch. The initial RS-25 engines are former space shuttle main engines, modified to provide the additional thrust needed for the larger, heavier SLS rocket.

Originally designed more than 40 years ago to provide a specific power level categorized as 100 percent thrust, the RS-25 version of the space shuttle main engine has been upgraded to operate at 111 percent of its original power.

NASA has been testing RS-25 modifications and flight engines at Stennis since January 2015 in preparation for the Exploration Mission-1 (EM-1) and Exploration Mission-2 (EM-2) flights of SLS. EM-1 will test the capabilities of the new rocket and will carry an uncrewed Orion spacecraft into space beyond the moon. EM-2 will be the first flight to carry humans aboard the Orion spacecraft, returning astronauts to deep space for the first time in more than 40 years.

The next series of tests at Stennis is scheduled to begin mid-August. For the test, a new flight controller component will be installed on the RS-25 developmental engine and fired just as during an actual launch. The new flight controller is a major part of the RS-25 modifications, operating as the “brain” of the engine to help it communicate with the SLS rocket and to provide precision control of engine operation and internal health diagnostics.

A total of 10 hot fires are scheduled for the test series, seven by the end of 2018 and three in the early part of 2019. Each will feature a flight controller that will be used on an actual SLS mission. Each RS-25 test moves the agency closer and closer to its return to deep space exploration, to such destinations as the Moon and Mars.

In addition to testing RS-25 engines and components for SLS flights, Stennis is preparing to test the actual core stage that will be used on the EM-1 mission. NASA has been modifying the B-2 Test Stand at Stennis for the core stage testing. The testing will involve installing the flight stage on the B-2 Test Stand and firing all four of its RS-25 engines simultaneously, as during a launch.

RS-25 tests at Stennis are conducted by a team of NASA, Aerojet Rocketdyne and Syncom Space Services engineers and operators. Aerojet Rocketdyne is the RS-25 prime contractor. Syncom Space Services is the prime contractor for Stennis facilities and operations.

https://www.nasa.gov/image-feature/rs-25-engine-installed-on-stennis-space-center-stand-for-new-test-series (https://www.nasa.gov/image-feature/rs-25-engine-installed-on-stennis-space-center-stand-for-new-test-series)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/14/2018 02:36 PM
*RS-25 Static Fire Klaxon* NASA TV coverage should start about 3:20pm Eastern (7:20pm UTC) - subject to change.

ARTICLE: RS-25 resumes production restart development testing -
https://www.nasaspaceflight.com/2018/08/rs-25-resumes-production-restart-development-testing/

- By Philip Sloss
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:16 PM
Live on NTV, test targeted for 3:41 pm.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:35 PM
Finally, commentary!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:43 PM
IGNITION!!!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:45 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/14/2018 07:46 PM
Hot fire!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:46 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:48 PM
SHUTDOWN!!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:49 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:51 PM
Stand still standing post test fire. (No pun intended)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:53 PM
NASA administrator talking about the test fire today.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 08/14/2018 07:55 PM
The test appears to have been cut short.

Quote
Today’s RS-25 Engine Test @ NASA's John C. Stennis Space Center has concluded with a duration of 319 seconds.
https://twitter.com/NASAStennis/status/1029456143360450560
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:56 PM
Concluding webcast.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: RocketLover0119 on 08/14/2018 07:59 PM
Replay on youtube:

https://m.youtube.com/watch?v=KFDfrqvXPQg
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/14/2018 08:02 PM
Aborted early. Waiting for details.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Targeteer on 08/14/2018 09:25 PM
The test appears to have been cut short.

Quote
Today’s RS-25 Engine Test @ NASA's John C. Stennis Space Center has concluded with a duration of 319 seconds.
https://twitter.com/NASAStennis/status/1029456143360450560

The honks at Public Affairs strike again.  Twist the truth until it is unrecognizable.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 08/14/2018 10:17 PM
Updated article:
https://www.nasaspaceflight.com/2018/08/rs-25-resumes-production-restart-development-testing/

The RS-25 test at Stennis suffered an "early cut" (abort) issued by the test conductor at 319 seconds when at 111% RPL. Was a Liquid Hydrogen transfer initiation issue. Likely a facility issue, not the engine. Test objectives were still achieved!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: psloss on 08/14/2018 10:27 PM
We're asking for clarification, but it sounds like a similar issue to the last early cutoff.  In that case it was a facility pump used to backfill the test stand's LOX run tank from barge tanks. 

Today, it was on the fuel (LH2) side, but we don't know why they couldn't "initiate" the LH2 barge tank to LH2 run tank transfer.

From:
https://www.nasaspaceflight.com/2018/01/rs-25-hot-fire-2018-testing-sls-engines/
Quote
During a test, the engine in the A-1 test stand draws its propellants from "run tanks" built into the test stand, but the stand is also equipped with interconnected piping and other infrastructure like pumps that allow the run tanks to be backfilled with additional propellant from barge tankers that are docked there for tests.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 09/05/2018 04:21 PM
NASA confirms that the next RS-25 test is scheduled for Friday September 7th at around 3:00 PM EDT.
https://www.nasa.gov/multimedia/nasatv/schedule.html
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 09/05/2018 10:25 PM
The test is now tomorrow according to Stennis. NASA TV is also in agreement.
Quote
IT'S THAT TIME AGAIN! Tune in tomorrow for a Facebook Live event of an RS-25 Engine Test tentatively targeted for 2:00 p.m. (CDT) @ NASA's John C. Stennis Space Center #SLSFiredUp #NASASSC #NASAStennis
https://twitter.com/NASAStennis/status/1037458763157000194
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/06/2018 05:29 PM
For today's test - by Philip Sloss.

https://www.nasaspaceflight.com/2018/09/next-rs-25-gordon-test-thursday/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/06/2018 07:21 PM
LIVE:

https://www.youtube.com/watch?v=wwMDvPCGeE0
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/06/2018 07:31 PM
Near the bottom half of the hour.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/06/2018 07:37 PM
Shutdown.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: fthomassy on 09/06/2018 07:37 PM
Full duration! :)
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 09/06/2018 07:49 PM
Replay of the test
https://www.youtube.com/watch?v=rxqMw7BazoI
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/06/2018 08:01 PM
Philip's article updated:
https://www.nasaspaceflight.com/2018/09/next-rs-25-gordon-test-thursday/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Michael Baylor on 09/21/2018 03:28 PM
Next test on the NASA TV schedule for 3PM Eastern on September 25th. As usual, the time is tentative.

https://www.nasa.gov/multimedia/nasatv/schedule.html
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/25/2018 05:45 PM
Philip Sloss' article for the test!
https://www.nasaspaceflight.com/2018/09/development-engine-rs-25-testing-2/
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: zubenelgenubi on 09/25/2018 07:28 PM
NASA TV, Public Channel is currently replaying an ISS PAO student Q&A, with Serena Aunon-Chancellor.

The young students are on GWU's campus.  EDIT: just ended.

The Media Channel is running recorded NASA video news footage.

However, the engine test is still listed on the schedule for both channels, 3:00-4:30 pm EDT (now).

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/25/2018 08:18 PM
And we're live:
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/25/2018 08:32 PM
Firing!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/25/2018 08:36 PM
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 09/25/2018 08:41 PM
Shutdown. Seemed like full duration.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 09/25/2018 08:53 PM
Test replay
https://www.youtube.com/watch?v=tX6mgGONnWg

Edit:
Press release from NASA:
Quote
NASA stayed right on schedule with the third in a series of scheduled RS-25 rocket engine tests at Stennis Space Center near Bay St. Louis, Mississippi. The successful hot fire of RS-25 developmental engine No. 0525 met all test objectives and featured several key elements, most notably an acceptance test of an engine flight controller for use by NASA’s new Space Launch System (SLS) rocket. The hot fire also represented the seventh test of a 3D-printed pogo accumulator and the third test of a main combustion chamber fabricated using a bonding technique designed to save time and money. The flight controller units are a key component of the RS-25 engine, serving as the “brain” to help it communicate with the rocket and to provide control of its operation and internal health diagnostics. The 3D-printed pogo accumulator assembly is another component that dampens potential propellant pressure oscillations that can cause a rocket to become unstable in flight. The main combustion chamber was fabricated using a bonding technique called hot isostatic pressing (HIP), which saves considerable time and money over more traditional methods. The HIP process uses high pressure and heat to create bonds that can withstand extreme stress. Engineers are testing RS-25 engines to help power the new SLS rocket, built to carry humans deeper into space than ever before, including to the Moon and Mars. Four RS-25 engines will help power the SLS at launch, providing 2 million pounds of combined thrust. The engines will fire in conjunction with a pair of solid rocket boosters to provide more than 8 million pounds of total thrust to lift SLS into orbit. NASA is testing all RS-25 engines and flight components for the rocket at Stennis, as well as the core stage that will be used on the first SLS flight. Exploration Mission-1 will test the new rocket and carry an uncrewed Orion spacecraft into space beyond the Moon. Exploration Mission-2 will be the first flight to carry humans aboard the Orion spacecraft to deep space. The Sept. 25 test is part of a series scheduled to continue into 2019. All of the tests will feature flight controllers and specific objectives to test and evaluate engine capabilities and performance. RS-25 tests at Stennis are conducted by a team of NASA, Aerojet Rocketdyne and Syncom Space Services engineers and operators. Aerojet Rocketdyne is the RS-25 engine prime contractor. Syncom Space Services is the prime contractor for Stennis facilities and operations.
https://www.nasa.gov/image-feature/nasa-right-on-schedule-with-rs-25-flight-controller-test
Title: RS-25 testing at Stennis for SLS today, 26 September at 16:30 Eastern
Post by: Aurora on 09/26/2018 06:35 PM
Will be broadcast live at 16:30 today - 26 September

https://www.nasa.gov/nasalive

Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Zpoxy on 09/26/2018 07:42 PM
Will be broadcast live at 16:30 today - 26 September

https://www.nasa.gov/nasalive



That's a typo, the engine test was yesterday.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Aurora on 09/26/2018 08:40 PM
Yes, my mistake - sorry everyone
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: MattBaker on 10/11/2018 09:46 AM
Maybe lost in all this...hoopla:

Quote
3 p.m. – RS-25 Engine Test from Stennis Space Center (Public Channel)

Today. 3 PM Eastern, 19:00 UTC

The article by Philip Sloss from this post:
Philip Sloss' article for the test!
https://www.nasaspaceflight.com/2018/09/development-engine-rs-25-testing-2/

also has today, October 11th, as the next test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/11/2018 07:51 PM
Ignition!

https://twitter.com/NASASpaceflight/status/1050474056414310400
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/11/2018 07:54 PM
Wind is blowing in the right direction to see it rain!
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 10/11/2018 08:28 PM
test replay
https://www.youtube.com/watch?v=QpF44y5DWR4
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/30/2018 03:55 PM
https://twitter.com/NASAStennis/status/1057312621517565953
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: eeergo on 10/31/2018 02:27 PM
https://twitter.com/NASA_SLS/status/1057629601986420736
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/31/2018 05:08 PM
https://twitter.com/NASAStennis/status/1057694944989757440
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 10/31/2018 05:53 PM
Test is imminent.  Warning siren sounded.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 10/31/2018 05:55 PM
"Single engine up and burning."  In my best NASA PAO voice.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/31/2018 05:55 PM
https://twitter.com/NASASpaceflight/status/1057707586651328519
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Hog on 10/31/2018 06:02 PM
I got 8 minutes 15 seconds for that test.
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: Chris Bergin on 10/31/2018 06:03 PM
Shutdown.

https://twitter.com/NASASpaceflight/status/1057709579419729921
Title: Re: RS-25 testing at Stennis for SLS - UPDATES
Post by: SciNews on 10/31/2018 06:12 PM
500 seconds
https://www.youtube.com/watch?v=j4qpnXDvuxc