Henry Spencer wrote:
> I don't recall a failure like that, actually... Both Pegasus and Taurus
> do roll control (in the case of Pegasus, after first-stage separation,
> first-stage roll control being aerodynamic) using cold-gas thrusters in
> the avionics package, and always have.
>
> I wonder if you are thinking of the early engine cutoff of the second
> Ariane 5 flight, which was caused by a spiral tube pattern in the nozzle
> extension, whose roll torque was badly underestimated and overwhelmed
> the roll thrusters.
No, he's thinking of the first Pegasus XL flight that was designed
completely in CFD CAD (ie no testing) and had a roll issue on first
flight.
Michael
----------------------------------------------------------------------
Michael Wallis KF6SPF (408) 396-9037 [EMAIL PROTECTED]
President, Wallis International http://www.wallis.com
Sir Isaac Newton:
"If I have seen farther than others it is because I have stood on the
shoulders of giants."
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