> Therefore I am applying up to 1/4 of the force on the flaps that would be
> placed on them if they were down 45 degrees. That is a little higher than
I
> thought. I will try to stay at 5 degrees until under 140 kts. So far
though,
> no trouble.



Hmmmm, not so sure about that Lorn. The trig is, of course, correct but the
assumption is that all of the settings are the same airspeed. The force on
the flaps at any given extension would, I believe, increase with the square
of the airspeed. I suspect that 10 degrees at 160 kts would produce a lot
more force than 17.4%.  160 kts should produce about 2 1/2 times the stress
at any given setting than 100 kts. Sooo, if we assume that 45 degrees at 100
knots is the max allowable force, then 10 degrees at 160 knots should be
about 61% of the max allowable (17.4 x 2.5) / 70.7 .  Still conservative but
more than 17%.

Is my thinking correct here or am I missing something?

Bill
harrelson@erols.com
N5ZQ  LNC2  O-320  VA42  Fredericksburg, VA