Originally Posted by
acdii
My Cub wings were both twisted and no matter what I tried, I could not untwist them. I have no idea why one wing off each Cub warped, the board is perfectly flat, and they were fully pinned when glued. :shrug: Both are covered in Koverall too.
Acdii might I suggest something I have done, I propped both ends so I could get my heat gun under the wing , I then used std. door shims to get the twist outplus one shim to get some over twist I used about 20 lbs of shot bags on the rout end the heating a bit on both side ,and adding shot bags at the tip end cept heating till tip was down on the shim and all of the wrinkles were gone, at this point the whole panel was all most hot left it till the next day.
After removing all of the shot bags laid the wing on my table top and found I had about a 1/32 reverse warp the was wash out so I left it and the bird flew great for about 5 years, till I lost the elevator servo, so it self destroyed including the engine(sieto 150 golden Knight)
Try it it might work for you
Cheers Bob T