RCgothic Posted October 22, 2021 Share Posted October 22, 2021 Lunar regolith has a density of ~1500kg/m3, so a Starship buried to 3m would be under 4500kg per m2 or 7360Pa in lunar gravity. Internal air pressure of 1bar or 100kPa easily counterbalances that, though unintentional depressurisations and large unpressurized spaces would need additional consideration. Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 22, 2021 Share Posted October 22, 2021 (edited) 22 minutes ago, RCgothic said: Lunar regolith has a density of ~1500kg/m3, so a Starship buried to 3m would be under 4500kg per m2 or 7360Pa in lunar gravity. Internal air pressure of 1bar or 100kPa easily counterbalances that, though unintentional depressurisations and large unpressurized spaces would need additional consideration. Yeah while pressurised it can definitely support being buried, and I imagine they want it to be livable before starting to bury it. I'm not sure if "habitat can survive rapid depressurization" would be a necessity for the base design to be adopted, but probably making the structure strong enough to support that regolith (which has a density lower or comparable to sand) under lunar gravity wouldn't be too hard? Edited October 22, 2021 by Beccab Quote Link to comment Share on other sites More sharing options...
Scotius Posted October 22, 2021 Share Posted October 22, 2021 Excavate deep hole -> land Starship in the hole -> bulldoze regolith back into the hole -> cover StarshipBase up to access hatch(es) -> profit! Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 22, 2021 Share Posted October 22, 2021 This is all of Ship 21, nosecone and barrels. The tiling has noticebly improved from S20 Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted October 22, 2021 Share Posted October 22, 2021 Any word on the tiles that fell off during static fire? Quote Link to comment Share on other sites More sharing options...
Guest The Doodling Astronaut Posted October 22, 2021 Share Posted October 22, 2021 8 hours ago, Beccab said: Starship lunar wetlab base! This is basically the old lunar SIVB concepts NASA was working on for AAP, but with much more volume Full report:https://drive.google.com/file/d/1x1ujpGR43BbIr6Bp_hEzYuVFCCp-hYGo/view I love this idea so much. It’s genius Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted October 22, 2021 Share Posted October 22, 2021 4 hours ago, Scotius said: Excavate deep hole -> land Starship in the hole -> bulldoze regolith back into the hole -> cover StarshipBase up to access hatch(es) -> profit! Better yet, just have Starship hover over the surface and excavate it’s own hole. Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted October 22, 2021 Share Posted October 22, 2021 1 minute ago, CatastrophicFailure said: Better yet, just have Starship hover over the surface and excavate it’s own hole. Bonus: we can gather the ejecta after it rains down upon the Earth as meteorites! Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 22, 2021 Share Posted October 22, 2021 13 minutes ago, JoeSchmuckatelli said: Any word on the tiles that fell off during static fire? I'm 99% certain that 6 tiles fell off total, all from the body (the nosecone ones stayed). Musk/SpaceX clearly doesn't seem worried by that at the moment, and also confirmed that they did expect tiles to fall of during SFs Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted October 22, 2021 Share Posted October 22, 2021 17 minutes ago, JoeSchmuckatelli said: Bonus: we can gather the ejecta after it rains down upon the Earth as meteorites! I had to look it up… Raptor exhaust velocity 3.26 km/s, lunar escape velocity 2.38 km/s, so… seems plausible… Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 22, 2021 Share Posted October 22, 2021 Quote Link to comment Share on other sites More sharing options...
Entropian Posted October 22, 2021 Share Posted October 22, 2021 3 hours ago, The Doodling Astronaut said: It’s genius Really any idea with Starship is genius Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted October 22, 2021 Share Posted October 22, 2021 51 minutes ago, Beccab said: Can one of you smart guys explain this? Why does a rocket engine, designed for high-heat operation, require a thermal protective cover? (And what dictates when you need one vs when you dont) thanks in advance Quote Link to comment Share on other sites More sharing options...
Cuky Posted October 22, 2021 Share Posted October 22, 2021 My guess would be that it is to either protect them during re-entry (as I understand they are only actively cooled while running) or to protect them from each other Quote Link to comment Share on other sites More sharing options...
zolotiyeruki Posted October 22, 2021 Share Posted October 22, 2021 1 hour ago, JoeSchmuckatelli said: Can one of you smart guys explain this? Why does a rocket engine, designed for high-heat operation, require a thermal protective cover? (And what dictates when you need one vs when you dont) thanks in advance *Some* things inside a rocket engine are designed to handle high-heat stuff. And most of the hot stuff is on the inside. There's plenty of stuff outside the combustion chamber and bell that don't react too well to super high temperatures. Recall during some of the earlier SS hops, there were things catching fire under the skirt, from residual fuel burning after an engine shuts down, or turbulent airflow sucking burning stuff back up. Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 23, 2021 Share Posted October 23, 2021 Daily hopper! And the chopsticks are now free S20 raptor delivery is also ongoing Quote Link to comment Share on other sites More sharing options...
Minmus Taster Posted October 23, 2021 Share Posted October 23, 2021 7 hours ago, Beccab said: Daily hopper! And the chopsticks are now free S20 raptor delivery is also ongoing Hey! It's MY job to show TDH comics >:( /j Quote Link to comment Share on other sites More sharing options...
cubinator Posted October 23, 2021 Share Posted October 23, 2021 The tower looks like it's holding a gun from that angle. Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 23, 2021 Share Posted October 23, 2021 Finally, the tank farm is satisfying to look at Quote Link to comment Share on other sites More sharing options...
Deddly Posted October 23, 2021 Share Posted October 23, 2021 Why don't they do the static fire before fixing the tiles in place? Quote Link to comment Share on other sites More sharing options...
grawl Posted October 23, 2021 Share Posted October 23, 2021 25 minutes ago, Deddly said: Why don't they do the static fire before fixing the tiles in place? It's probably meant to identify the poorly attached tiles, and fix them. Those that held ok will probably keep holding, so no worries about them, those that got knocked off are replaced and thoroughly checked. It's not a bug, it's a feature, actually. I see it as a way faster than full inspection ! Quote Link to comment Share on other sites More sharing options...
Beccab Posted October 24, 2021 Share Posted October 24, 2021 (edited) Gateway to Mars The shots of the last 10 seconds are just amazing (these) Edited October 24, 2021 by Beccab Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted October 24, 2021 Share Posted October 24, 2021 (edited) 7 hours ago, grawl said: It's probably meant to identify the poorly attached tiles, and fix them. Those that held ok will probably keep holding, so no worries about them, those that got knocked off are replaced and thoroughly checked. It's not a bug, it's a feature, actually. I see it as a way faster than full inspection ! Wow. That's definitely the nicest possible way I have ever seen of saying "either this attachment scheme or the quality control still needs some work". There is just no way that "parts falling off our flight vehicle" is "a feature". Edited October 24, 2021 by mikegarrison Quote Link to comment Share on other sites More sharing options...
Nothalogh Posted October 24, 2021 Share Posted October 24, 2021 20 minutes ago, mikegarrison said: Wow. That's definitely the nicest possible way I have ever seen of saying "either this attachment scheme or the quality control still needs some work". There is just no way that "parts falling off our flight vehicle" is "a feature". If you attach all the tiles in the same manner, and then subject the vehicle to the stress and vibration of pressure test, cryo-proof, and static fire, you are able to positively identify the zones at highest risk of tile loss. You are now able to adjust accordingly in those areas. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 24, 2021 Share Posted October 24, 2021 9 hours ago, Deddly said: Why don't they do the static fire before fixing the tiles in place? Why build the catching tower before even having tested the first stage of the thing to catch? What can go wrong? 28 minutes ago, Nothalogh said: If you attach all the tiles in the same manner, and then subject the vehicle to the stress and vibration of pressure test, cryo-proof, and static fire, you are able to positively identify the zones at highest risk of tile loss. Vibration test doesn't require the static fire. 28 minutes ago, Nothalogh said: You are now able to adjust accordingly in those areas. Put more glue? What if next time another tile unsticks? Quote Link to comment Share on other sites More sharing options...
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