07 Nov 2025, 18:33 [ UTC - 5; DST ]
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 02 Aug 2024, 10:35 |
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Joined: 09/02/11 Posts: 1953 Post Likes: +2449 Location: N Alabama
Aircraft: 1968 B55
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Username Protected wrote: ASA says it is “evaluating all options” for the safe return of Starliner crewQuote: One informed source said it was greater than a 50-50 chance that the crew would come back on Dragon. Another source said it was significantly more likely than not they would. To be clear, NASA has not made a final decision. This probably will not happen until at least next week. It is likely that Jim Free, NASA's associate administrator, will make the call. I read somewhere that the space station is running low on food. I don't know about the food, but the underlying problem they're about to have is that there aren't enough parking spaces. Here's a map of what's currently docked. There are 2 docking ports that can accommodate US-spec modules. They're both full. They can't send up Crew-9 (currently scheduled for no earlier than 18 August) until they free up one of those two. Starliner is on one, and the Crew-8 Dragon is on the other. They can't undock Crew-8 because that would leave insufficient crew return seats for an emergency evacuation. They can't undock Starliner because, well, vague handwave. NASA could let Starliner autonomously re-enter and fly Butch and Suni home with the Crew-8 guys. But pretty soon they're going to start pushing Crew-9 to the right if they don't make up their minds. I hope that doesn't lead to get-there-itis.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 02 Aug 2024, 13:50 |
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Joined: 08/26/15 Posts: 10031 Post Likes: +10022 Company: airlines (*CRJ,A320) Location: Florida panhandle
Aircraft: Travel Air,T-6B,etc*
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Username Protected wrote: There are 2 docking ports that can accommodate US-spec modules. They're both full. I know a guy out of docking bay 94 who might be up for the job...
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 02 Aug 2024, 16:58 |
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Joined: 04/26/13 Posts: 21885 Post Likes: +22542 Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: I read somewhere that the space station is running low on food. Oh my. Attachment: Donner Party.jpg
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_________________ My last name rhymes with 'geese'.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 12:06 |
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Joined: 09/02/11 Posts: 1953 Post Likes: +2449 Location: N Alabama
Aircraft: 1968 B55
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Username Protected wrote: Three separate, well-placed sources have confirmed to Ars that the current flight software on board Starliner cannot perform an automated undocking from the space station and entry into Earth’s atmosphere.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 16:14 |
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Joined: 04/26/13 Posts: 21885 Post Likes: +22542 Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: Three separate, well-placed sources have confirmed to Ars that the current flight software on board Starliner cannot perform an automated undocking from the space station and entry into Earth’s atmosphere.
I wonder when they would have figured that out if the thrusters hadn't left them stuck. Or, is that a planned "feature"? Boeing. 
_________________ My last name rhymes with 'geese'.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 17:37 |
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Joined: 04/26/13 Posts: 21885 Post Likes: +22542 Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: Would you really want a software glitch to undock the Starship by itself? I would expect that a competent company <cough>SpaceX</cough> would design the spacecraft and its software in such a way that it was free of "glitches" and sufficiently redundant that it could work autonomously. Dragon does it all the time. At this point there may be a few people wishing that it would just undock itself and go away.
_________________ My last name rhymes with 'geese'.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 18:00 |
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Joined: 12/10/07 Posts: 35790 Post Likes: +14238 Location: Minneapolis, MN (KFCM)
Aircraft: 1970 Baron B55
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Username Protected wrote: Would you really want a software glitch to undock the Starship by itself? I would expect that a competent company <cough>SpaceX</cough> would design the spacecraft and its software in such a way that it was free of "glitches" and sufficiently redundant that it could work autonomously. Dragon does it all the time. At this point there may be a few people wishing that it would just undock itself and go away. Heck, even the Apollo Guidance Computer's software had a tremendous amount of redundancy and the version used for the Lunar Lander saved the day (and the astronauts) by repeatedly and seamlessly rebooting several times during final descent to the moon during the Apollo 11 mission.
_________________ -lance
It's easier to fool people than to convince them that they have been fooled.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 21:04 |
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Joined: 07/02/14 Posts: 2224 Post Likes: +2396 Location: Lakeville, Minnesota (KLVN)
Aircraft: J35
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Lance, if I recall the overflow was because Buzz decided he knew better and left both the landing and rendezvous radar on at the same time. Had the system been used properly the overflow would not have taken place Username Protected wrote: I would expect that a competent company <cough>SpaceX</cough> would design the spacecraft and its software in such a way that it was free of "glitches" and sufficiently redundant that it could work autonomously. Dragon does it all the time.
At this point there may be a few people wishing that it would just undock itself and go away. Heck, even the Apollo Guidance Computer's software had a tremendous amount of redundancy and the version used for the Lunar Lander saved the day (and the astronauts) by repeatedly and seamlessly rebooting several times during final descent to the moon during the Apollo 11 mission.
_________________ N340Q J35
ASEL&MEL ASES CFII MEI Former BPPP Instructor
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 21:24 |
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Joined: 01/30/08 Posts: 1257 Post Likes: +1155 Location: San Diego CA.
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Username Protected wrote: Lance, if I recall the overflow was because Buzz decided he knew better and left both the landing and rendezvous radar on at the same time. Had the system been used properly the overflow would not have taken place This in incorrect. This was just what CBS news reported because complex issues are just too hard. They essentially made it up. Both astronauts followed the checklists correctly and the RR was in AUTO per the landing checklist. (Originally the thought was that they could track angles on Columbia during the descent but this was abandoned. Programming was not changed and neither was the checklist. The interface between the RR and the computer was not fully understood at the time.) At some point in time Aldrin said he left it in auto in case there was an abort but it was on the checklist to be in AUTO so he would have had to go cowboy to put it in SLEW or OFF. Here are a couple of papers that explain the issue. https://ibiblio.org/apollo/Documents/Ch ... egesis.pdfThis white paper covers this subject in its entirety. https://www.doneyles.com/LM/Tales.html
_________________ Member 184
Last edited on 06 Aug 2024, 19:44, edited 3 times in total.
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Post subject: Re: Boeing Starliner: 80 Problems Posted: 05 Aug 2024, 21:31 |
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Joined: 09/07/15 Posts: 150 Post Likes: +127
Aircraft: Bonanza N35
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Username Protected wrote: The current software was capable of an automated flight and docking, arguably more difficult than undocking and entry. Yes, Boeing may have just assumed that the crew would manually perform those functions, but really, is that a good idea? Even just as a back up I'd expect the vehicle to be capable of autonomous operation.
If it were a different company I might be inclined to think that there was a conscious, purposeful reason for it, but it's not, it's Boeing. In theory it was capable of automated docking, but in the face of the thruster failures it didn't work, and had to be done manually by Butch.
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