Falcon 9 / Dragon

Discussion in 'Science' started by MoorKhan, Dec 8, 2010.

  1. MUTMAN

    MUTMAN Member

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    No. My bones are fused so any g-force are likely to be too much.
    But maybe :)
     
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  2. PabloEscobar

    PabloEscobar Member

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    [​IMG]

    Any launch, when that steam gushes out from the launch pad - cold shivers, every time.
     
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  3. evilasdeath

    evilasdeath Member

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    apparently the centre core fell over in rough seas, takes a bit of of the gloss off it but still amazing.
     
  4. MUTMAN

    MUTMAN Member

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    Is it just a fuel thing for getting the third core back (to land) ???
     
  5. PabloEscobar

    PabloEscobar Member

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    Yes, by the time the third core exhausts, it's to far downrange, and travelling to fast to flip it and fly it all the way back. You could more fuel, for a longer boostback burn.. but then you'd need to take even more fuel, to lift the mass of that fuel... Rocket Equation is a bitch.

    [​IMG]
     
  6. Sphinx2000

    Sphinx2000 Member

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    Indeed. Also, if the payload is too heavy or it's required orbit needs to be further out in space - all the fuel may be required and the rocket doesn't come back at all.
     
  7. RnR

    RnR Member

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  8. MUTMAN

    MUTMAN Member

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    Arrr yes, I didn't consider the increased speed and burn back requirements :o

    more rockets !! hahaha
    (i get there's diminishing returns on that equation)
     
  9. evilasdeath

    evilasdeath Member

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    We have had some falcon 9 launches like that with no recovery of older boosters.

    It will be interesting to see if now that heavy works, is if those middle loads, ie loads that expend a falcon 9 single but not a heavy use the heavy in a recoverable format instead of expending a single booster.


    They also need to update the supporting arm on the drone ship to support the heavy centre core, that why they lost this one, it required crew to make it safe and the seas were too rough, apparently anyway.
     
  10. Quadbox

    Quadbox Member

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    Maybe, there's only been one single expendable block 5 launch to date though, which was because the USAF are a pain in the arse and wanted a direct injection to high inclination MEO (55deg) for GPS-IIIA-01. I'd imagine the only expendable block 5 launches we're likely to see are those oddball us government launches, and spacex can actually afford to charge them more as they're already massively undercutting ULA.

    EDIT - Certainly the next GPS3 launch is still manifested as being on an F9b5, presumably expendable again (given the gps constellation all use the same inclination)
     
    Last edited: Apr 17, 2019 at 12:26 PM
  11. PabloEscobar

    PabloEscobar Member

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    What's cheaper?

    Is the heavy scalable, can they just turn on radial symmetry, and bolt another 2 cores and 6 and 12 O'clock?
    Is asparagus staging technologically or economically feasable?
     
  12. RnR

    RnR Member

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    https://www.teslarati.com/spacex-starlink-first-launch-date/

    I was amazed at the latency gains in using low altitude sats.



    Apparently as the sats slowly fall and burn up they will be replaced with newer upgrades sats.
     
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  13. elcarter1

    elcarter1 Member

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  14. Quadbox

    Quadbox Member

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    Ohnoes, looks like they lost the gridfins. I guess hopefully at least most of the merlins will be salvagable, but apparently those gridfins cost a mint to make
     
  15. Sphinx2000

    Sphinx2000 Member

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    Apparently it was more of a case that a certain team wasn't ready yet, but they couldn't wait unfortunately.

    The heavy "octagrabber" robot that normally drives under and holds down the normal Falcon 9 first stage on the un-manned barge for sea transport wasn't yet compatible with the Falcon Heavy center core first stage which is too different. Discussion here: https://twitter.com/elonmusk/status/1118016410586771456

    [​IMG]
     
    Last edited: Apr 20, 2019 at 12:13 PM

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