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sh1pman

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Everything posted by sh1pman

  1. sh1pman
    I never get used to how frickin’ huge that thing is.
  2. sh1pman
    I dunno. They can replace the electronics, flush the fuel lines, maybe static fire it, see what happens. If all is ok, use it for maxQ abort test.
  3. sh1pman
    Ukrainian tanks, Russian engine, assembled in USA, launched in international waters. “Russian rocket”...
  4. sh1pman
    Plot twist: Bezos arrives first on his giant Stena freighter and steals the stage!
  5. sh1pman
    Interesting how two months ago we saw why LES is important. And today we had a good demonstration of why SpaceX aims their boosters at water before the final landing burn. ...I think I heard of a certain starship with no emergency escape system planned, doesn’t seem to be the best idea now, does it?..
  6. sh1pman
    As long as it doesn’t involve a drill./s
  7. sh1pman
    So it keeps post-soviet Russians from teaching rogue states how to build rockets. And when the ISS is discontinued, RD-180s are no longer needed, and the relationship is not great... you know. Will the problem still be there?
  8. sh1pman
    We don’t know if the engines are same or not. They might’ve swapped some between the flights.
  9. sh1pman
    It’s still needed to fish the fairing halves out of the water.
  10. sh1pman
    No idea what they’d do with the money. Build BFR faster? Do some R&D on in situ prop production from water ice?
  11. sh1pman
    SpaceX already has enough government money from CRS and Commercial Crew. It also doesn’t really fit their roadmap, with BFS eventually replacing everything.
  12. sh1pman
    Don't worry. Mr. "Twitter" Rogozin will use his old contacts, and the money will appear. Along with raised taxes and retirement age, frozen pension and underfunded hospitals, because who cares about such things when we need to go to the Moon!
  13. sh1pman
    Yeah, I’ll make a post about it. Sneak peek: you can get SLS Block 1 performance while only expending one full Falcon 9 stick (S1+S2). Sneak peak #2: existing cryogenic upper stages are way too small and weak for SHLVs. They’re only better than kerolox for super light payloads (less than 6t) on high energy trajectories.
  14. sh1pman
    This actually inspired me to spend all evening yesterday calculating different theoretical SHLVs from similar off-the-shelf American commercial rockets. Like Falcon 9 boosters instead of Soyuz-5, DCSS or Centaur upper stage, etc. I might post the results (and resulting Excel calculator) in this section, if anyone's interested
  15. sh1pman
    thanks!
  16. sh1pman
    Yeah, I'm actually more interested in the prop reserve fraction, because I'm making a rocket calculator that can account for reuse. I'll use 20% and 10% for now, these numbers give pretty realistic payload reduction fractions.
  17. sh1pman
    Are there any good estimates of how much fuel F9 S1 has to reserve for ASDS and RTLS landings? I guess it's somewhere around 10% and 20%, respectively, but I may be wrong.
  18. sh1pman
    Vocal minority, I'd say.
  19. sh1pman
    4D underwater chess.
  20. sh1pman
    Well, Luna-25-28 landers are still planned for 2021-25, and Angara-based super heavy moon rocket for 2028, but it probably belongs to another thread.
  21. sh1pman
    Russia likely to pull out of the Gateway project, because, quote From here
  22. sh1pman
    Here’s the video with pointers, tooltips, and (IMO) better music:
  23. sh1pman
    S7 should make a bigger rocket and call it Angara-7, since that name is also vacant.
  24. sh1pman
    I like “Soyuz-5” more.
  25. sh1pman
    So was I. That tweet shouldn't be taken seriously. Let's wait for off-the-shelf fusion drives, then we'll talk about human interstellar travel.
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