Falcon 9 / Dragon

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

  1. Strange1

    Strange1 Member

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    Not really, its about 12 months ago according to Elon....
     
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  2. BlueRaven

    BlueRaven Brute force & optimism

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    Last edited: Mar 5, 2020
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  3. BlueRaven

    BlueRaven Brute force & optimism

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    Stuck the landing at ~t+8:30, and that's a half-century.
    50 successful first stage landings.
    Absolutely remarkable, Bravo SpaceX.

    Didn't realise when I posted, this is also the last flight of Dragon V1.
    They seem as persistent at knocking these milestones out of the park as I am at banging out these sports metaphors.
    By which I mean very. They are very persistent. :D
     
    Last edited: Mar 7, 2020
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  4. SLATYE

    SLATYE SLATYE, not SLAYTE

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    But SN-2 didn't! They did much the same test (all of a week later) and it passed. And now SN-3 is being stacked. At this rate they're going to need to start crashing Starship prototypes just to clear space for the next ones.

    (all credit to Reddit's spacex and spacexlounge sections; that's where I normally go for the latest information)
     
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  5. MUTMAN

    MUTMAN Member

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    5
    4
    3
    2
    1
    liftoff
    disregard

    what happened ?
     
  6. elcarter1

    elcarter1 Member

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    The stream mentioned engine power anomaly. Didn't seem to get a chance to ramp up for long. Just under 2 seconds post ignition then aborted.

    Might have detected one or more merlin's not firing / producing less than calculated thrust? My bets a sensor error.
     
    Last edited: Mar 16, 2020
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  7. MUTMAN

    MUTMAN Member

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    that'd be good if its just a simple thing that could be fixed in a few days.

    just rewatched falcon heavy test launch. god thats amazing watching the two side boosters land together. just so good to watch :)
     
  8. Frinky

    Frinky Member

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    The speed of progress at Boca Chica is quite remarkable. I've always thought the 2024 human mars landing target to be ludicrously optimistic but now I'm not so sure..

    Videos for those who may not have seen them.







     
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  9. MUTMAN

    MUTMAN Member

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    well, whatever it was, its now fixed and about to launch.

    45 minutes :)

    edit. so it was a " out of family power read on one engine, causing an auto abort "

    range is clear and we are 6.minutes to liftoff
     
    Last edited: Mar 18, 2020
  10. MUTMAN

    MUTMAN Member

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    baby went boom boom :(
    everyday astro has some interesting thoughts about an engine brown out just before meco. and the relight for reentry seems to have had an anomaly :(

    oh well. 5 up and 4 down is a hell of an achievement still.
     
  11. Sphinx

    Sphinx Member

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    Spacex lost another first stage landing again today for their internal Starlink mission when attempting to land, but it was the first time a first stage was used for a 5th time in to space. The mission was still a success.

    Looks like they possibly had a Merlin engine cut out right before MECO1? First time in a long time.

     
    Last edited: Mar 19, 2020
  12. SLATYE

    SLATYE SLATYE, not SLAYTE

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    I guess this sort of thing is expected as they expand the envelope (fifth time to space for that booster). Presumably they'll investigate it, find the cause, and either fix it or find a good way to check for it on the ground during refurbishment.
     
  13. Quadbox

    Quadbox Member

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  14. rockofclay

    rockofclay Member

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    Good to see. If they can manage to do it, it'll blow the competition out of the water.
     
  15. Sphinx

    Sphinx Member

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    Looks like Starship has taken on another design revision, for the lunar landing variant at least.

    [​IMG]

    [​IMG]
     
  16. rockofclay

    rockofclay Member

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    No heat shield. It's not reusable, they must have cut it down to convince NASA that it's possible. Orbital refuelling would be a lot harder if they have to expend a cargo starship for each fill.

    Assuming that the cargo starship has the same heat shield free design that is.
     
  17. Sphinx

    Sphinx Member

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    Why wouldn't it be reusable? One assumes this design will be a 100% rocket based landing for both the Moon and on Earth, similar to the Falcon 9? The heat shield is the engines area.
     
  18. Quadbox

    Quadbox Member

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    I'm interpreting that it's a LEO -> orbital gateway -> lunar surface -> LEO design. Specialised starship that never reenters earth atmosphere, just comes back to LEO to get refuelled. Which would make it 100% reusable, just only for the purpose of ferrying astronauts (EDIT - and no small amount of gear) to and from lunar surface
     
  19. MUTMAN

    MUTMAN Member

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    ^ so some heavy falcon launches to load it up ?
    how would that transfer take place ? it would need a ISS style docking arrangement ??
     
  20. Quadbox

    Quadbox Member

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    No, as in getting refuelled exactly the same way every other starship variant is. By the tanker starship. The entire architecture's not capable of getting beyond LEO without it
     
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