Author Topic: SLS Development Stage UPDATE Thread (2)  (Read 350609 times)

Online FutureSpaceTourist

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #840 on: 09/05/2017 09:19 PM »
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.@NASA_SLS Booster Update: Five of 10 segments are now in storage & awaiting shipment to @NASAKennedy where they will be prepped for launch

https://twitter.com/orbitalatk/status/905159759715635200

Offline RonM

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #841 on: 09/06/2017 01:56 AM »
Great article, but lacking proper metric units. Don't want to alienate the rest of the world!
Isn't SLS being built using Imperial units?  If so, the most precise numbers will be in those units.

 - Ed Kyle
US Imperial Units is primary measurement and Metric is listed as secondary per Space Launch System (SLS) Mission Planner's Guide - ESD 30000 Baseline. PSM most charts are hybrid.

Sorry about being pedantic, but the US doesn't used Imperial units. We use US Customary units. They are mostly the same, but with some important differences.

https://en.wikipedia.org/wiki/Comparison_of_the_imperial_and_US_customary_measurement_systems

I wished we used the metric system, it's a lot simpler when you get used to it.

Offline russianhalo117

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #842 on: 09/06/2017 03:54 AM »
Great article, but lacking proper metric units. Don't want to alienate the rest of the world!
Isn't SLS being built using Imperial units?  If so, the most precise numbers will be in those units.

 - Ed Kyle
US Imperial Units is primary measurement and Metric is listed as secondary per Space Launch System (SLS) Mission Planner's Guide - ESD 30000 Baseline. PSM most charts are hybrid.

Sorry about being pedantic, but the US doesn't used Imperial units. We use US Customary units. They are mostly the same, but with some important differences.

https://en.wikipedia.org/wiki/Comparison_of_the_imperial_and_US_customary_measurement_systems

I wished we used the metric system, it's a lot simpler when you get used to it.
document says US Imperial Units so that is what we are going to just roll with the flow. Discussion thread here: http://forum.nasaspaceflight.com/index.php?topic=38021.0

Online FutureSpaceTourist

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #843 on: 09/06/2017 01:53 PM »
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Orbital ATK Completes Qualification of Solid Rocket Booster Avionics for NASA's Space Launch System

Company’s Five-Segment Boosters will Help Provide Initial Thrust for First Two Minutes of Flight for SLS

Full Booster Certification Set to Complete Later this Year


Dulles, Virginia 6 September 2017 – Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, recently completed an important qualification test of the avionics system for the solid rocket boosters the company has developed and is now manufacturing for NASA’s Space Launch System (SLS). Completion of this milestone is an important step toward preparing the SLS and Orion spacecraft for their first flight in 2019. Two Orbital ATK-developed five-segment rocket boosters will be used on each SLS launch to help provide initial thrust for the first two minutes of flight.

The avionics system is considered the “brains of the booster” as it starts booster ignition, communicates with the SLS launch vehicle computers during flight, and initiates booster separation upon completion of the first stage burn. The system is now qualified as meeting NASA’s demanding human-rating requirements, which provide a level of redundancy to ensure a safe flight environment through various phases of lift-off, ascent and staging.

“Completion of booster avionics system qualification is a significant step forward in supporting overall vehicle qualification and launch of the first flight of SLS – Exploration Mission-1,” said Jeff Foote, Vice President of NASA Programs for Orbital ATK’s Propulsion Systems Division. “We are proud of this accomplishment and look forward to completing full certification of the booster later this year.”

Qualification of the booster avionics system included a rigorous and comprehensive test series that thoroughly verified the fidelity of the system in a variety of expected and abnormal conditions. Key interactions confirmed during qualification testing included the ability to initiate booster ignition, control the booster during flight, and terminate flight.

The Space Launch System is NASA’s new heavy-lift launch vehicle that is being built to take crew and cargo to destinations beyond earth orbit, including to cislunar space and eventually Mars. SLS, along with the Orion spacecraft, will enable human exploration on a variety of missions to deep space. It has the greatest capacity of any launch system ever built, ensuring continued American leadership in space exploration.

Orbital ATK manufactures the twin, five-segment solid rocket boosters in Promontory, Utah, about an hour and a half north of Salt Lake City. Contributing to SLS booster production are 29 key suppliers across 17 states including Alabama, Arizona, California, Connecticut, Florida, Indiana, Kentucky, Massachusetts, Minnesota, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Texas, Utah and Wisconsin.

http://www.orbitalatk.com/news-room/release.asp?prid=285

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #844 on: 09/07/2017 05:31 AM »
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NASA Completes Welding of Liquid Oxygen Tank for First SLS Flight

NASA is another step closer to completing all main structures for the agency’s first launch of the Space Launch System deep space rocket. The liquid oxygen flight tank was recently built in the Vertical Assembly Center robotic welder at NASA's Michoud Assembly Facility in New Orleans. After the liquid oxygen tank was inspected, it was moved to another area for plug welding to fill the holes left by the friction stir welding process. Five major parts -- the engine section, liquid hydrogen tank, intertank, liquid oxygen tank and forward skirt –will be connected together to form the 212-foot-tall core stage, the backbone of the SLS rocket. Boeing, the prime contractor for the core stage, is welding the liquid hydrogen tank structure--the final major core stage structure to be built for the first integrated flight of SLS and Orion. The liquid hydrogen and liquid oxygen tanks will hold 733,000 gallons of propellant to power the stage's four RS-25 engines that together produce more than 2 million pounds of thrust.

Image credit: NASA/MSFC/Michoud/Jude Guidry

Last Updated: Sept. 1, 2017

https://www.nasa.gov/exploration/systems/sls/multimedia/nasa-completes-welding-of-liquid-oxygen-tank-for-first-sls-flight.html


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Re: SLS Development Stage UPDATE Thread (2)
« Reply #846 on: 09/13/2017 08:32 PM »
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Booster update: Both aft segments for @NASA_SLS boosters are now in final assembly at our facility in Utah. #OrbitalATKDelivers

https://twitter.com/orbitalatk/status/908064562695561216

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #847 on: 09/21/2017 02:45 PM »
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NASA_SLS‏Verified account @NASA_SLS 14m14 minutes ago

Workers at @NASA_Marshall are cleaning the #NASASLS LVSA by hand so thermal protection can be applied! >> https://go.nasa.gov/2xO46Aw

https://twitter.com/NASA_SLS/status/910873761372672000

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Re: SLS Development Stage UPDATE Thread (2)
« Reply #848 on: 09/25/2017 10:06 PM »
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Final Assembly techs transferred @NASA_SLS #EM1 Ctr/Ctr booster segment for processing today in Promontory. EM-1 aft segment in background

https://twitter.com/orbitalatk/status/912425096396115968

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