Author Topic: Boeing's CST-100 - Master Updates and Discussion Thread 3  (Read 75904 times)

Online Chris Bergin

Saw this on twitter and couldn't find a ULA Starliner patch on the forum:

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Newest mission patch for @ulalaunch's #AtlasV launching @Boeing's #Starliner capsule! #welaunchedthat

https://twitter.com/ularocketman/status/852197019829522432

You are a Twitter guru! Only just noticed it now Tory's RT'ed it. I like it!

Online FutureSpaceTourist

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Re: Boeing's CST-100 - Master Updates and Discussion Thread 3
« Reply #201 on: 04/21/2017 05:58 PM »
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Aerojet Rocketdyne Successfully Completes Qualification Tests on Reusable Engine to Support Next Era of Human Spaceflight from the United States

SACRAMENTO, Calif., April 20, 2017 (GLOBE NEWSWIRE) -- Aerojet Rocketdyne, Inc., a subsidiary of Aerojet Rocketdyne Holdings, Inc. (NYSE:AJRD), has successfully completed hot-fire qualification tests of an engine that demonstrates the ability to meet reusability requirements for Boeing's Crew Space Transportation (CST)-100 Starliner crew module propulsion system. The tests were conducted on Aerojet Rocketdyne's MR-104J hydrazine monopropellant engine in Redmond, Washington. For NASA service missions to the International Space Station, Boeing's Starliner spacecraft will carry up to four astronauts and time-critical scientific research.

"Our engineers have incorporated a unique design that will allow the MR-104 engine to be used on multiple missions, providing the reliability, cost-efficiency and reusability our customer needs to be competitive in the current commercial space environment," said Aerojet Rocketdyne CEO and President Eileen Drake. "We look forward to delivering the engines for the crew module and continuing our proud heritage of enabling astronauts to fly to the International Space Station from U.S. soil."

The Starliner crew module propulsion system will use 12 MR-104J engines for reaction control to orient the vehicle during re-entry into the Earth's atmosphere. Prior to re-entry, attitude control is provided by the Service Module Engines, also provided by Aerojet Rocketdyne.

The MR-104J, designed by Aerojet Rocketdyne, was developed and tested under the company's Commercial Crew Transportation Capability (CCtCap) subcontract to Boeing. Similar to other reaction control system engines, the MR-104J includes additional features to increase redundancy that meet critical requirements and improved strength to withstand multiple shocks at operating temperatures. The engine upgrades also provide reusability for Boeing as it certifies Starliner crew modules for multiple missions.

Under the CCtCap subcontract to Boeing, Aerojet Rocketdyne will provide propulsion system hardware that includes Crew Module Reaction Control engines; Launch Abort Engines, Orbital Maneuvering and Attitude Control thrusters, and Service Module Reaction Control System thrusters. Boeing will assemble propulsion hardware into the Starliner spacecraft at its Commercial Crew and Cargo Processing Facility at NASA's Kennedy Space Center in Florida.

Aerojet Rocketdyne is an innovative company delivering solutions that create value for its customers in the aerospace and defense markets. The company is a world-recognized aerospace and defense leader that provides propulsion and energetics to the space, missile defense and strategic systems, tactical systems and armaments areas, in support of domestic and international markets. Additional information about Aerojet Rocketdyne can be obtained by visiting our websites at www.Rocket.com and www.AerojetRocketdyne.com.

http://www.rocket.com/article/aerojet-rocketdyne-successfully-completes-qualification-tests-reusable-engine-support-next

Offline catdlr

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Re: Boeing's CST-100 - Master Updates and Discussion Thread 3
« Reply #202 on: 05/17/2017 02:42 AM »
Boeing Begins a New Era in Space

Boeing
Published on May 16, 2017


We are at the edge of a new era in human spaceflight. Boeings CST-100 Starliner, set to launch in 2018, will be one of the first commercial space capsules to take people to and from low-Earth orbit. Will you be a future passenger?

https://www.youtube.com/watch?v=K9K7B4xsQOU?t=001

Tony De La Rosa

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Re: Boeing's CST-100 - Master Updates and Discussion Thread 3
« Reply #203 on: 05/19/2017 02:45 PM »
Not a lot of detail I'm afraid:

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Tim Robinson‏ @RAeSTimR 5m5 minutes ago

1st Boeing CST-100 Starliner in construction here at KSC.

https://twitter.com/RAeSTimR/status/865576751635861504

Offline Sotar

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Re: Boeing's CST-100 - Master Updates and Discussion Thread 3
« Reply #204 on: 05/25/2017 10:12 PM »
I'm not an engineer or scientist so forgive me / delete my post if it is in the wrong place, or the answer is obvious and I just need to go search more.

Why is  hydrazine monopropellant, still being used?  My understanding is that it is pretty toxic.  Perhaps it is relative inexpensive, thus gives very good thrust / control for the cost?


I'm guessing that we just haven't developed propellant / engines that would be as cost effective and as usable.    :(


-S
1% for Space

Offline edkyle99

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Re: Boeing's CST-100 - Master Updates and Discussion Thread 3
« Reply #205 on: 05/26/2017 03:18 AM »
I'm not an engineer or scientist so forgive me / delete my post if it is in the wrong place, or the answer is obvious and I just need to go search more.

Why is  hydrazine monopropellant, still being used?  My understanding is that it is pretty toxic.  Perhaps it is relative inexpensive, thus gives very good thrust / control for the cost?


I'm guessing that we just haven't developed propellant / engines that would be as cost effective and as usable.    :(


-S
No igniter is needed.  Almost unlimited restarts are possible.  Open a valve and pass N2H4 through a catalyst and, presto, instant reliable relatively cool thrust with no moving parts except for a valve or two.  Put these thrusters on a satellite and they'll run for 15 or 20 years, maybe longer.  See Voyager.  They'll keep thrusting.

Wikipedia gets this one right.  It says "[e]ngineers choose monopropellant systems when the need for simplicity and reliability outweigh the need for high delivered impulse".  Think about your life depending on that thruster, then underline that word reliability a few times.

 - Ed Kyle
« Last Edit: 05/26/2017 03:32 AM by edkyle99 »

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