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  #32  
Old July 29th 05, 05:34 PM
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I said:

For example at forward cg, the stall is often determined by running out
of elevator travel.

I made an error. I should not have used the word determined.
I should have been more clear. The point is that with the elevator limited
based on the stall at aft CG, the forward cg case can be compromised.
You tend to run out of elevator which make the approach speeds
higher etc, etc.

You said:
False. Unless by "often" you mean "rarely".


I reply:
Indirectly, stall can be changed by what has happened at forward cg.
The compromises of elevator throw and cg position will change
the published speeds.
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snips:
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I said:
One other thing. Stall speeds vary considerably with entry rate. The regs
specify a 1 knot per second entry rate. At slower entry rates, the stall
speed is higher.


You replied:
So, you're saying as the entry rate approaches 0 knots per second, the

stall
speed goes to infinity?

Um, seems to me you have this backwards.


I reply:
I made no such inference that the stall speed grows infinitely. What I said
is correct. Try it. It's not easy to do. Count down from 10 to 1 at the same
time
you are reducing the airspeed that last 10 knots. One knot per second.
The stick input will probably be very non-linear in order to do this.
Now do the last 10 knots in 5 sec. Now do it as slowly as possible.
It takes multiple runs, since the "last" 10 knots will be redefined
depending
on the stall speed at each entry rate. The most difficult part is that last
second. That's the part that counts for data.
Touching the elevator stop, rolling off, or nose reacting in a direction
opposite
elevator input all count as stall.


Enough of this - the thread was about spoilers.

Dennis