5 ms·

Elon - "Looks like the issue was stiction in the biprop throttle valve, resulting in control system phase lag. Should be easy to fix." AKA lost constrol of the

• Animats 11y ago
  Aviation Leak says that message was "withdrawn."[1] [1] http://aviationweek.com/space/spacex-checks-throttle-valve-after-flawed-falcon-9-recovery-attempt http://aviationweek.com/space/spacex-checks-throttle-valve-a...
  • pixie_ 11y ago
    [2] ITAR.
• LoSboccacc 11y ago
  as KSP player and armchair engineer: when the rocket touched on the barge, thrust vectoring couldn't rotate the rocket anymore, since legs become a fixed pivot. and rcs didn't had enough trust to upright the rocket. now I don't think the issue is as easy as 'rcs didn't had enough thrust' what looks like is that the control system minimized vertical/horizontal velocity but allowed the rocket to touch down with too much rotational momentum. whether this was caused by software or hardware has to be seen. if they are storing the landing fuel in the same storage as the ascent fuel, sloshing may be a big factor. but I honestly have no idea, just like the speculation.
  • baq 11y ago
    musk says throttle got stuck, in KSP terms the ctrl key didn't work as the computer expected it to.
    • cronin101 11y ago
      Ugggh. StickyKeys activating and crashing my spaceship AGAIN.
    • LoSboccacc 11y ago
      yeah I was so happy when they added X
    • madaxe_again 11y ago
      Their wireless keyboard ran out of batteries. Honestly, I've had several missions to Jove which have ended in disaster because my keyboard died during orbital insertion.
      • Rooster61 11y ago
        Jool, you mean? I think you are confusing Jupiter's adjective with the the KSP counterpart's name. And that would be so annoying. It's no trivial task to get all the way out there and bleed off all that velocity.
        • madaxe_again 11y ago
          Yeah, Jool. Has been a few months since I played - after pulling that stunt twice in a week. Both occasions missed critical burns to get out of aerobraking orbit, crashed - as best one can crash on Jool.
• imaginenore 11y ago
  You fail at basic grammar. I don't think you're ready to judge anybody. It's "could have" and "would have", not "could of", nor "would of".
  • smoyer 11y ago
    I don't know pixie_ but non-native English speakers hear "could of" and "would of" when we use the contractions "could've" and "would've".
    • saraid216 11y ago
      I'm too lazy to go turn on showdead for GP, but... > I don't know pixie_ but non-native English speakers hear "could of" and "would of" when we use the contractions "could've" and "would've". You actually hear "could ov" and "would ov", but since the latter aren't actually words, there's an automatic shunt to the nearest known word. Sometimes this occurs in the speaker; sometimes this occurs in the listener. It occurs in the speaker because of loopback: you say "could ov"; you hear "could of"; you say "could of".
      • hollerith 11y ago
        >You actually hear "could ov" and "would ov" All occurences of the English word spelled "of" are pronounced "ov": pronouncing it with an F sound instead of a V sound would sound strange to an English speaker even where spelling it "of" is correct usage. Your explanation still applies, though, provided that we assume that the listener actually hears "could v" and "would v", but since there is no word pronounced "v", there's an automatic shunt to the word that is pronounced "ov".
    • nacs 11y ago
      I actually see this ("could of" and "would of") more in native speakers than non-native speakers actually. I have also seen it used many times in writing so it's not just a "heard it wrong" issue. Here in the South (US), it's disturbingly common.
• Shivetya 11y ago
  I would lay claim to the idea its far easier to land in a field than on a floating barge. For one thing the field doesn't move, second its an awfully easier target to hit with greater room for error
  • lmm 11y ago
    The point was that this particular problem (oscillation due to control lag) would still have caused a crash even if it had been landing in a field.