Re: Shuttle Aerodynamics

On Fri, 21 Sep 2007 07:51:47 -0500, Craig Fink <WeBeGood@xxxxxxxxx>
wrote:


Andy Foster has a very good set of web pages on the subject of Shuttle
ascent.
http://www.theandyzone.com/index.html
I think you'll have to ask him to put them back up if you really want to
read them.

The SSME are moved independently, it's the flight control portion of the
On-Board flight software and the mixing logic that transforms the error
signals into gimbal movements. This mixing logic is changed during flight
for various reasons. So, with respect to pitch rate errors, they all move
together because the flight control mixing logic commands them to do it
that way.

Or, google groups sci.space.shuttle, there are plenty of good discussions in
the past about this subject.
Thanks Craig, for that very useful post, I really appreciate it.
Best Regards,
Jim in Houston.

Contrary to popular opinion RN does not mean Real Nerd!
Teddy Roosevelt's mother said: "Fill what is empty,
empty what is full, and scratch where it itches"

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