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Old 06-11-2009 | 09:51 AM
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Default covering a compound curve.

I am doing a recover on my Great Planes Reactor. I am looking for info on how to cover the fuse into vertical stab curve.
I have no problems with flat and curved surfaces, but this part of the plane has me scratching my head.
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Old 06-11-2009 | 11:35 AM
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Default RE: covering a compound curve.

Go ahead and practice with some smaller pieces, and I think you will want to tack it to the flat part and stretch it by pulling it and lay it down while holding it tight. I would practice with scrap pieces first for sure.
Old 06-11-2009 | 01:10 PM
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Default RE: covering a compound curve.

I would start by covering the sides to just above the top of the horziontal stab. Then work on one side, and start from just ahead of the vertical flare into the fuselage and back to the end of the fuselage. Use a lot of hang over and work it similar to a wing tip. When you start to make the curve over, cut the covering in 1" strips within a 1/2" of the LE edge of the vertical. You can then slowly heat and pull it into place. If you stop the covering just past the LE, you can then cut a strip about 3/8" wide, or what ever the width of the vertical is, and cover the LE after both sides are down. The thin strip will hide the seam between the two sides.

I would suggest Oracoat or one of the light weight coverings used for gliders. I'm not sure the brand, as I aquired several partal rolls in a lot of stuff I bought from a local guy. That stuff is increadable for working curves, it sticks like you wouldn't believe and is really quite tough. I used it on the wing tips of a Pheonix Fun Star that I recovered and the wing is really thick airfoil and a compound rounded tip with exposed ribs and stringers that doesn't give you a single flat spot I just covered the tip then covered the wing surface after. I've had to repair it twice due to tip contact with the runway and it was a real pleasure to work with. I'll try to find the brand. It has a clear plastic edge on the covering and a light weight weight clear plastic backing.

Don
Old 06-12-2009 | 08:24 PM
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Default RE: covering a compound curve.

That is by far one of the more difficult covering challenges.

The way I do it is to cover the side of the fuse and fin, then put one or two slits in the covering in the curve area. make them close to the curve, but not quite up to it.

Now, heat it with a heat gun as you pull it down over the curve. the slits will help, but you need to be careful that the pulling soesn't rip the covering where the slits end.

I'd draw a diagram, but I'm on the road at XFC right now and don't have Photoshop

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