Astrobotic PM-1 mission, CLPS mission with NASA and commercial payloads |
Astrobotic PM-1 mission, CLPS mission with NASA and commercial payloads |
Feb 4 2022, 03:12 AM
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#1
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
I am starting a new thread for this mission which should fly this year.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jan 9 2024, 08:05 AM
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#2
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Member Group: Members Posts: 127 Joined: 3-September 12 From: Almeria, SE Spain Member No.: 6632 |
Update #6:
"An ongoing propellant leak [...]" "[...] in a stable sun pointing state for approximately 40 more hours, [...]" https://twitter.com/astrobotic/status/1744543629392134194 Anything known about what caused this propellant leak? Thorsten |
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Jan 9 2024, 04:41 PM
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#3
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Anything known about what caused this propellant leak? I haven't heard anything, and there is not much public detail about Peregrine's propulsion system. But it started right after the system was pressurized and was large enough to disturb blankets. I can think of three root causes: 1) damage during launch vibration (hopefully unlikely since the spacecraft was vibe-tested); 2) propellant migration causing a small explosion that blew a hole in the plumbing; 3) pressure regulator failure leading to overpressurization. Assuming https://www.nasa.gov/stmd-game-changing-dev...in-space-talos/ describes what they ended up flying, the main engines were MON-25/MMH biprops but how the attitude-control thrusters (presumably monoprops) were tied in, I have not seen. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 9 2024, 06:55 PM
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#4
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
snip 1) damage during launch vibration (hopefully unlikely since the spacecraft was vibe-tested) snip I wonder if there might be an unexpected resonance- e.g. when the SpaceX Falcon Heavy launches from Kennedy Space Center, the Vehicle Assembly Building 'squeals' because it randomly has a resonant frequency with the Merlin engine exhaust. Sorta makes sense that the first actual lift off a brand-new rocket is when you actually find out about the sounds and launchpad acoustics. |
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