ORIGINAL: daveopam
It's an easy fix but takes two pairs of hands. Have a buddy twist the aile just past flat the opposite way of the twist. This will make wrinkles in the covering. Take your heat gun and heat the wrinkles out. It is important that your buddy hold the twist during the heating and until it cools. A pair of gloves will help since you may be heating next to his fingers. When he lets go it will spring back a little and it should be straight. You can do this several times if need be.
David
Ok thanks for confirming that. So what I was thinking in essence can accomplish it safely then. Except that you're suggesting using a heat gun.
I'm actually able to just mask-tape the inboard end of the aileron to neutral and then push down the outer end tip. I see the wrinkles on the bottom side as I push down. I can use the other hand to apply heat.
Since it's attached to the wing I guess I'll need to make a card board "blast shield" for the wing if I use a heat gun.
I've ironed out wrinkles on solid balsa surfaces before using both iron and heat gun, but never over a delicate structure like this.
I might try with an iron first as that's more subtle... but it might not radiate enough to shrink the covering enough to tighten the structure. My "heat gun" by the way is actually a paint stripper that can be turned down to heat-gun levels. I've used that on solid surfaces before. None of the LHS's here seem to carry hobby heat guns for some strange reason.
Thanks