> Any one have experence getting 80 to 90 degrees of travel one one of these
> things? I can get enought travel but the flap hinge is so stiff I'm
> stalling a 60 inch oz torque servo at about 45 degrees.
I've run into this problem with one or two planes when I thought I REALLY
needed 80 or 90 degrees of flap. Actually 60 or 70 is generally enough
unless you want to stop before you can think about it. Ocasionally the
hinge line has not been scored deep enough or wide enough to make the hinge
flexible enough for large angles - or there is still too much epoxy left in
the fabric to allow the hinge to flex easily.
With the wing well supported upside down on a foam pad flex the flap towards
you using both hands equally spaced on the flap. SLOWLY flex the flap until
it goes slightly past the position you are looking for. You may want to
approach this in stages. Once you've reached the desired point, flex the
flap up and down many times. Finally, tape the flap to hold it there
overnight. While you're doing this listen to the wing for bad sounds - STOP
immediately if you start hearing strange noises. You might, with good
hearing, be able to hear the epoxy flaking off the hinge material - that's
ALL you should hear. Also, as you approach the point where the hinge
becomes stiff, look at the area on either side of the hinge line for
distortion or deviation from a flat appearance - STOP if things start to
look wrong.
Hope this helps.
Jim Porter
Neckargemund-Dilsberg
Germany
"The airplane stays up because it doesn't have the time to fall."
Orville Wright
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