Author Topic: RS-25 testing at Stennis for SLS - UPDATES  (Read 49253 times)

Online catdlr

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #20 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.
Tony De La Rosa

Offline JBF

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"In principle, rocket engines are simple, but that’s the last place rocket engines are ever simple." Jeff Bezos

Offline okan170

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #22 on: 06/12/2015 03:31 AM »
Its up on this end:

Offline hpras

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #23 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. 


Online catdlr

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #25 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.
Tony De La Rosa

Offline Hog

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #26 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.
« Last Edit: 06/13/2015 05:23 AM by Hog »
Paul

Offline Stardust9906

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #27 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.

Offline jacqmans

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #28 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

Offline jacqmans

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #29 on: 06/15/2015 01:52 PM »



Offline okan170

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #32 on: 06/26/2015 02:55 AM »
Test is now on YouTube:

Offline AnalogMan

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #33 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

Online Chris Bergin

Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #34 on: 07/17/2015 07:28 PM »
SLS related Test 5 of 7 for RS-25 0525 about to occur.


Offline AnalogMan

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #36 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]


Offline Jet Black

Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #38 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?
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. -- Richard Feynman

Offline dbush

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Re: RS-25 testing at Stennis for SLS - UPDATES
« Reply #39 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?

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