Warped Wing. Is it beyond repair?

[paul]

The wings have been tissued on the bottom,watered and doped, It has been left for about a week, and has developed a nasty twist half way up one of the wings. How can I straighten this out or is it beyond repair? Also how can I stop this from occurring again?
From a Messerschmitt BF109

Thanks Paul

[Mitch]

I would suggest remove the tissue. Lightly sand the frame. wet the wing and clamp or weight it down in the prper shape.

To prevent this from happening. I would suggest you cover both sides of the wing with dry paper. Try to keep the wrinkles out. then wet and clamp, brace or weight it in shape as the paper dries. When it is completely covered, paper shrunk. Then dope the entire wing.

Good Luck. Mitch

PS Here is my wing from my last 400 series Bf109 project...

Notice the entire wing is covered top and bottom. The paper is shrunk. At this stage I check the paper. If I see any bad wrinkles, I would cut out the section and re-paper that section. After it passes that inspection I would dope the entire wing top and bottom. Your wing has less ribs, more fragile and more likely to get a warp.

[Steve Blanchard]

Paul,

I agree with Mitch. You should always cover both sides before shrinking it. You can cover wet if you like but you will need to re-wet before pinning to dry. You should always pin down the parts when drying. doping or sealing should be done to the entire piece top and bottom at one time because of the same warping issue. Also if you use dope and brush it on you should pin it to dry. If you try very thin coats of Krylon they do not need to be pinned to dry. It dries so quickly that you would have a dry piece before you got the first pin in.

Good Luck,

Steve

[paul]

Thankyou both for the advice. Guess I made a rookie mistake, which wont happen again Thanks

[paul]

Thankyou, worked a treat. Back in business