Astronomy and space exploration

Discussion in 'General Discussion' started by eloyc, Apr 10, 2017.

  1. jayco

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    Nice, I didn't know they were already using autogenous pressurisation for the tanks. I though there were going to use COPVs until they moved to the orbital vehicles, can't blame them after all the issues they had with them.

    My guess is probably is just RCS and, maybe, pneumatic stuff as you say like to open and close valves but they could be electrically driven as well. For ignition maybe not, probably they just open the valves and let the fuel start moving the pumps just using gravity but I'm not really sure. I really need to get up to speed with Starship operations, I wish I had more time for these things.

    But I don't think they'll help much with that maneuver, right? Even if they move to hot gas RCS do they have enough thrust to make any difference? I thought that maneuver was handled mainly by the aerodynamic surfaces and the engine's TVC.
     
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  2. cheapchips

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    The hot gas RCS they'd proposed was quite sporty, can't remember the stats. It's designed to keep SS/SH on target for landing in pretty much all weathers. I don't know if it removes the need to use Raptor TVC, but the will have enough oomf to change what the manoeuvre looks like.

    The landing thrusters for the HLS Moon Starship are probably just a repurposed hot gas RCS design too.
     
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  3. nutball

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    Because Raptor SN42 was onboard:

     
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  4. eloyc

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    I'm disappointed at the inaccuracy. I was expecting a Texan accent.
     
  5. jayco

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  6. cheapchips

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    "what the hell did they just to to my twin!" <Faints>
     
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  7. nutball

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    Oh dear, it's been on the bourbon I guess?
     
  8. hoom

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    "Oh no, not again" :runaway:
     
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  9. pharma

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    #769 pharma, Dec 23, 2020
    Last edited: Dec 23, 2020
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  10. jayco

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    Going back to helium for SN9.

     
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  11. cheapchips

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    Sounds like a sensible way to get flying/landing. They don't have to drop helium for the short to medium term. Might need to for long term for cost and availability on Mars (main tanks are will still be autogenously pressurised).

    The new booster landing idea they're pursuing it beautifully nuts.

     
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  12. pharma

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  13. eloyc

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  14. hoom

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