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Discussion
how to flatten depron?
Anyone have any tips for flattening depron sheets? All the control surfaces from a model I'm working on(index 2.2) are bowed slightly, and even after a week of sitting with some weight on them, they're still bowed when I take the weight off. Its not extreme, but its definitely noticeable and too much to forget about(about a 1-2mm gap in the center of an aileron if sitting on a flat surface).
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Put weights across the bowed parts on a flat surface and use a hairdryer to heat up the depron.
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I have found after a while that the control surfaces on my a couple of my planes have warped slightly, especially those control surfaces with counter balance design.
One way I rectified this was to slightly stretch and apply a short strip of hinge tape on the opposite side of the control surface. Care must be taken as, if the hinge tape is stretched too tight you can induce a warp in the opposite direction. Cheers, Jeff |
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Of course try this on a scrap piece of depron 1st to make sure your settings are right, but I use my heating iron. Real low settings and quick application of the iron to foam and treat it just like covering. Apply heat to opposite side of warp and overbend it in the direction you want to correct. During cooling let it set on a flat surface(ruler, block, table, etc) Works quickly after you've already constructed model and is a good quick fix in the field if you show up and realize your plane is warped when your're just about ready to fly! My 2 cents
Happy New Year!! Jason |
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Iron it like a pair of pants with Aluminium foil between on flat surface like glass. Those other remedies did not work for me and were huge pain anyway.
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Tries this too and it weakens the foam big time.
Quote:
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Quote:
Mike Hammel fancyfoam |
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