collectSPACE: Messages - Reply to Topic

Space News
space history and artifacts articles

Messages
space history discussion forums

Sightings
worldwide astronaut appearances

Resources
selected space history documents

Forum:	Commercial Space - Military Space
Topic:	[Discuss] Boeing Starliner Crew Flight Test

Want to register?

Who Can Post?	Any registered users may post a reply.
About Registration	You must be registered in order to post a topic or reply in this forum.
Your UserName:
Your Password:	Forget your password?
Your Reply: HTML is ON UBB Code is ON Smilies Legend	[QUOTE]Originally posted by Robert Pearlman: [B] [QUOTE]Originally posted by Headshot: [b]I am sure Boeing will eventually explain it all to us.[/b][/QUOTE] Here is what Steve Stich, NASA's manager for commercial crew, said today: <BLOCKQUOTE>[i]We understand now much better the integrated effect between how the guidance navigation control system, the flight control system during rendezvous, is commanding the thrusters to fire, and then what the result of those thruster firings are with the thrusters being in these doghouses. The doghouse has a lot of insulation on it. It's designed to protect the thrusters from cold temperatures while we're docked. But I think we're now seeing an integrated effect that we maybe didn't uncover on the ground during some of the early testing with Starliner, that if you command too many pulses on a thruster, and have those thrusters point at the sun, like we did for the eight hours that the crew was asleep, and have some OMAC [orbital maneuvering and attitude control] firings that we can have some cross talk in the thermal and have the temperatures increase, and so that's where we see the thruster degradation.[/i]</BLOCKQUOTE> Stich went on to say that the fix for the next flight could be in altering the thruster, altering the doghouse or maybe just changing the way they fly the vehicle, reducing the number of successive firings.[/B][/QUOTE]
Options	Disable Smilies in This Post. Show Signature: include your profile signature. Only registered users may have signatures.
*If HTML and/or UBB Code are enabled, this means you can use HTML and/or UBB Code in your message.

If you have previously registered, but forgotten your password, click here.

<A HREF="https://www.collectspace.com/ubb/Forum35/HTML/000914.html" target=_blank> *** Click here to review this topic. ***</A>

Contact Us | The Source for Space History & Artifacts