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sh1pman

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Everything posted by sh1pman

  1. sh1pman
    There’s no free return from Mars. You’d need to wait 3-4 months for the return window, otherwise you’ll get stranded in solar orbit forever. In case something bad happens, the crew will have to fix it.
  2. sh1pman
    What are they great at? Same efficiency over all altitudes sounds good, but SSTOs have really bad payload margins. And for multistage rockets each stage can have engine nozzles optimized for their operating altitudes.
  3. sh1pman
    Is that even a rocket engine? Looks so weird.
  4. sh1pman
    Yeah, I don’t think it was made in orbit, but it’s just weird that noone on the ground noticed the drill marks. And there’s no residual glue in or near the hole. Just weird. Was it all blown/evaporated into space? Did astronauts clean it off before taking the picture?
  5. sh1pman
    So, two versions now. The hull was deliberately punctured either on the ground, or in orbit. Both possibilities are quite terrifying. https://translate.google.com/translate?hl=&sl=ru&tl=en&u=https%3A%2F%2Fmeduza.io%2Fnews%2F2018%2F09%2F03%2Frogozin-zapodozril-kosmonavtov-v-prednamerennom-povrezhdenii-obshivki-soyuza-na-orbite
  6. sh1pman
    (Probably a stupid question) Have there been any instances of astronauts sleepwalking (sleepfloating)? I mean, the leak occurred when they were officially sleeping...
  7. sh1pman
    Someone needs to tweet this to Elon!
  8. sh1pman
    Are there any numbers for all-block-5 FH lift capability? The ones on their site haven’t changed since block 4 demo flight, so I assume they’re now outdated.
  9. sh1pman
    When performing aerocapture, BFS doesn’t have the fuel to do any burns other than landing, couple hundred m/s dv max.
  10. sh1pman
    Probably, but spark ignition IMO is better for reusability. You'd have to put the laser inside the combustion chamber. And I'm not sure if laser optics are able to survive the pressure of 300 atm and temperature of 3000K inside the Raptor engine without getting cracked, warped or bent.
  11. sh1pman
    Works even better in space than on Earth. Here, surrounding air can absorb the heat and keep the object warm. In space, the object will radiate away all of its heat until it reaches the equilibrium with CMB (something like 3K). Unless it’s in direct sunlight.
  12. sh1pman
  13. sh1pman
    That’s why I prefer kilojoules.
  14. sh1pman
    You can eat deep-fried arthropod shells, no need to peel them. I took deep-fried baby prawns with beer when I was in Greece a month ago. Shells were crunchy and easily edible. I guess you can also mash them into mincemeat and make insectburgers.
  15. sh1pman
    It is intended behavior.
  16. sh1pman
    Shuttle engines weren’t restartable? My bad then, I thought they were. How did they circularize then, with OMS?
  17. sh1pman
    Yea, except SLS is going to use these high-tech, super expensive, restartable engines... on expendable launches. Without restarting them. This I don’t really understand. Still, I like the second option more. Bigger is always better, especially in case of rockets. Something about square-cube law, if I remember correctly.
  18. sh1pman
    It’s not always possible to land a booster like SpaceX does. If you have a single powerful engine like RD-180 that can’t throttle down that deeply, or even be restarted, then recovering just the engine is your best option, still better than no reuse.
  19. sh1pman
    “Stratolaunch confirmed that, in addition to those launch vehicles, it is in the design study phase for a reusable spaceplane that would be launched from the aircraft. That vehicle would initially be used for cargo, but a “follow-on variant” would be able to carry astronauts.” https://spacenews.com/stratolaunch-confirms-launch-vehicle-development-plans/ Is something like that even possible? Single stage spaceplane that packs 8.5 km/s dv and has wings, heat shield and everything else that a spaceplane needs? And has enough margin for cargo or astronauts? What is it, an air-launched BFS?
  20. sh1pman
    Spaceplane is interesting. Single stage or multistage? Orbit or suborbital?
  21. sh1pman
    Might look like this:
  22. sh1pman
    Some highlights from Rogozin’s interview to TASS: Russia to develop super-heavy rocket as reusable spacecraft http://tass.com/science/1017451 Second launch pad at Vostochny spaceport may take 45 months to buildhttp://tass.com/science/1017475 Roscosmos chief specifies timeframe for Russian lunar program’s launch http://tass.com/science/1016800 Research module Nauka to be launched to ISS in November 2019http://tass.com/science/1017479
  23. sh1pman
    Expendable or reusable launches?
  24. sh1pman
    ISS spacewalk livestream:
  25. sh1pman
    Well, there's finally a use for LOP-G - being a fuel depot for skycrane.
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