Author Topic: Commercial Crew LOM scenario  (Read 3121 times)

Offline A_M_Swallow

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Re: Commercial Crew LOM scenario
« Reply #20 on: 05/15/2017 11:31 PM »
Such damage could occur as a result of an MMOD strike hitting near the docking adapter.
Yes and an MMOD strike can hit any spacecraft. Not just the CCP providers.

True but this is a Commercial Crew thread. Orion is NASA's problem. Each CCP provider needs a solution for its own spacecraft.

Offline docmordrid

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Re: Commercial Crew LOM scenario
« Reply #21 on: 05/16/2017 05:14 AM »
ISTM there is no full solution, only mitigations, and those mitigations (Whipple shields etc.) are pretty well understood.
« Last Edit: 05/16/2017 05:16 AM by docmordrid »
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Offline woods170

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Re: Commercial Crew LOM scenario
« Reply #22 on: 05/16/2017 08:44 AM »
Such damage could occur as a result of an MMOD strike hitting near the docking adapter.
Yes and an MMOD strike can hit any spacecraft. Not just the CCP providers.

True but this is a Commercial Crew thread. Orion is NASA's problem. Each CCP provider needs a solution for its own spacecraft.
It is slightly more subtle than that. CCP requirements, issued by NASA btw, also include requirements for MMOD protection.

Offline Hog

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Re: Commercial Crew LOM scenario
« Reply #23 on: 05/22/2017 08:22 PM »
Unlike Shuttle, Dragon and Starliner can go up fully autonomously... I guess that doesn't solve a crew rotation problem, but it does highlight that Shuttle isn't a good comp here.
Are you meaning that Shuttle couldn't launch to ISS without a crew?  Shuttle could launch with its normal flight crew compliment of 4, and still pick up a full ISS crew for de orbit.  Of course it wouldn't be doing the on station stay of 180 days.
Perhaps I am comprehending this poorly?
Paul

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Re: Commercial Crew LOM scenario
« Reply #24 on: 05/22/2017 08:38 PM »
If I recall correctly, Columbia flew with a two crew only on its debut mission.

Offline woods170

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Re: Commercial Crew LOM scenario
« Reply #25 on: 05/22/2017 08:55 PM »
If I recall correctly, Columbia flew with a two crew only on its debut mission.
That was the minimum required. Very much later in the program it became possible to re-enter and land an orbiter unmanned. But, launching it unmanned and have it dock with the ISS unmanned, was never in the realm of possibilities.

Offline Hog

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Re: Commercial Crew LOM scenario
« Reply #26 on: 05/27/2017 11:27 AM »
If I recall correctly, Columbia flew with a two crew only on its debut mission.
Correct, the 4 test missions, STS-1 through STS-4 were conducted with a crew of 2.

I stated a crew of four as that's what the Columbia Accident Investigation Board (CAIB) stated as the launch crew size would have been aboard Atlantis for the rescue.  Commander, Pilot and a couple EVA crew. In January, seven commanders, seven pilots, and nine spacewalk-trained astronauts were available. Downmass would have been 11 souls, 4 on the flight deck, and 7 on the middeck, if the rescue option would have been exercised.
Paul

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