Re: Spaceship One - a partial sucess.
From: Jon Berndt (jsb_at_at.hal-pc-dot.org)
Date: 09/30/04
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Date: Wed, 29 Sep 2004 21:46:47 -0500
"Christopher M. Jones" wrote:
> Bruce Hoult wrote:
> > And always will, with that design. Once it gets out of the atmosphere
> > it simply doesn't have enough authority on the attitide control jets to
> > compensate for the variations in thrust vector you're always going to
> > get from a rocket with solid fuel.
> >
> > The higher a flight is aiming for, the worse the problem will be.
>
> This is bunk. The problem on the first flight was straight
> up Pilot Induced Oscillation. The cause for the second
> problem is unknown but considering it was a roll problem
> it's very, very unlikely to be due to thrust variations
> (which would induce pitch or yaw variations).
Yep. There was a good deal of discussion about that one at work today. I
haven't found any information on attitude control effectors. Does SS1 have
some kind of reaction jets? Something else? Today's problem looked like a
pure roll excursion. An aeroelastic effect? Roll trim?
Jon
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