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#1
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SS1 -- one down, one to go!
Numerous news sites (Yahoo, BBC, Google, Reauters) reporting a
successful flight despite control problems, which might be some PIO (cue Mary). Engine was cutoff early, so the extra capacity wasn't tested. Not sure whether a bigger kick at ignition was part of flight. /dps |
#2
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Numerous news sites (Yahoo, BBC, Google, Reauters) reporting a
successful flight despite control problems, which might be some PIO (cue Mary). At http://spaceflightnow.com/ss1/status.html Melvill (the pilot) talks about PIO (Pilot-Induced Oscillation) in relation to the June flight. He says that they didn't have that in September's flight, but that the roll was a different thing (sounds like a steady roll rather than a back-and-forth thing). We seem to have 2 for 2 indication that Spaceship One tends to roll. Obviously, they don't think they need to change this before going for the X Prize. After that, I suppose they'll probably think about whether to tweak some part of the design (or, I suppose, figure it is case of pilots learning to fly this thing. After all, it was possible to recover from the roll in each case). |
#3
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Jim Kingdon wrote:
We seem to have 2 for 2 indication that Spaceship One tends to roll. Obviously, they don't think they need to change this before going for the X Prize. After that, I suppose they'll probably think about whether to tweak some part of the design (or, I suppose, figure it is case of pilots learning to fly this thing. After all, it was possible to recover from the roll in each case). They say that it's due to excessive dihedral on the wing: http://www.msnbc.msn.com/id/6145537/?GT1=5402 By the way, what are the three "what's-its" one either side of the spaceship in this photo?: http://msnbcmedia.msn.com/j/msnbc/Co...ed.vmedium.jpg I thought they might be an camera artifact, but they seem to have contrails behind them; shockwaves? Control thruster exhaust? Pat |
#4
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They say that it's due to excessive dihedral on the wing:
http://www.msnbc.msn.com/id/6145537/?GT1=5402 Thanks. Very informative and not something I've seen reported elsewhere (this is under "Potential causes", about 2/3 of the way down the page). By the way, what are the three "what's-its" one either side of the spaceship in this photo?: http://msnbcmedia.msn.com/j/msnbc/Co...ed.vmedium.jpg I suppose it is one of those water vapor effects, sort of like this one: http://www.truthorfiction.com/rumors/s/soundbarrier.htm but I don't really remember much about such things... |
#5
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Pat Flannery wrote:
By the way, what are the three "what's-its" one either side of the spaceship in this photo?: http://msnbcmedia.msn.com/j/msnbc/Co...ed.vmedium.jpg That's the wing flapping. Burt liked "Sky Captain" so much he had SS1 modified a little. |
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