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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
SpaceX launched their Falcon rocket yesterday: I watched a live webcast that included video from a camera on the rocket, and it was very impressive stuff. They made it all the way through first stage separation and almost to Earth orbit, but not quite. On the video feed, from a downward pointing camera, you could see almost the whole sphere of the Earth, and the bottom of the second stage with its red-hot glowing engine nozzle. At about T+5 minutes, the rocket appeared to wobble and veer off course, and then the video feed and telemetry were lost. I heard rumours that it went out of control and flipped. However, SpaceX still consider it a win, claiming that the rocket did 95% of what it was supposed to, and you can hardly disagree with that.
Anyone else have any news or gossip on what happened?
Registered Member #175
Joined: Tue Feb 14 2006, 09:32PM
Location: Sudbury, ON
Posts: 111
Looks like they're calling it a "roll excitation" -- which sounds like a wobble and out of control to me. I just remember I was going to watch the first webcast, but they scrubbed the launch with seconds left on the countdown. Man, talk about buzzkill! Probably not a related problem, but one never knows... Orbit or not, good on them. Any space access is good space access, in my book.
Pretty cool stuff. It looks like the second stage guidance control got 'feedback', too much gain and/or too slow response. You can see it start to wobble then as the ship gets lighter it worsens. If that's the problem, it would be an easy fix.
On stage seperation it looks like the first stage whacks into the second stage engine...
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
That was really neat to see the system go unstable. The Com must have been pretty off center as the system used up its fuel. I'm wondering if they're going to put some compensating thrusters on the second stage to stabilize it, or maybe use some kind of gyroscopic stabilization or something.
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SpaceX rocket launch
