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No escape tower on Dragon / Falcon 9



 
 
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Old September 30th 08, 03:43 PM posted to sci.space.policy
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Default No escape tower on Dragon / Falcon 9

On Sep 30, 5:04*am, Pat Flannery wrote:
Jochem Huhmann wrote:
Straight thinking, but a bit too straight... These are very different
scenarios: In one you want the capsule to move away from an exploding
booster as fast as possible, with very little need for an exact
trajectory, and in the other you want a rather gentle, but very precise
firing. Deorbiting by getting a hell of a kick in the butt with 20g is
not exactly what you want anyway.


You can get around that by using a escape system with a *number of
individual solid motors... in a escape mode, they are all fired at once;
in a retro mode they are fired sequentially, like the ones on Mercury
and Gemini were.
Gemini was to be blown free of a malfunctioning Titan II via firing all
four retro motors simultaneously once it had passed the ascent
trajectory point where its ejection seats were safe to use.

Pat


Titan II explosions and fireball were not of the magnitude of a RP-1/
LOX vehicle. The escape rockets would have to be much larger for
abort than deorbit. So the Gemini scenario is not applicable to
Falcon. Also don't want the vehicle having to figure out whether it
is an abort or deorbit. That would unnecessarily make things more
complex, therefore less reliable.
 




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