At 03:52 AM 1/5/2003 -0500, you wrote:
The exhaust of a monoprop engine is mach 4 right at the nozzle, but as the drogue gets pushed away, the speed will drop to the free stream velocity rather quickly. On a long riser, the fully deployed drogue will have rather little high speed exhaust impinging on it. Chutes get torn up when they have high dynamic pressure on them and they have taut lines. If this comes out right in front of the engine and catches a full mach 5 blast, it is going to be accelerated away very rapidly, not torn apart. That is the plan, anyway. :-)I'd be more worried about the drogue getting caught in any part of the exhaust flow, ripping it to shreds.Dan <A Kevlar drogue should be able to be ejected while the engines are still firing without harm, given the relatively cool temperature of the monoprop exhausts.>
We plan on ground testing this with the vehicle upside down.
John Carmack
_______________________________________________
ERPS-list mailing list
[EMAIL PROTECTED]
http://lists.erps.org/mailman/listinfo/erps-list
