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Old 12-10-2004 | 11:34 AM
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TLH101
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From: Elephant Butte, N.M.
Default Using Foam Core for Profile Fuselage?

I posted this in the twin forum to find out if I was nutz, now I am looking for input to see if the contruction method will work.
I have been thinking about a good plane to learn the finer points of twin warbird flight without a large expense. I have a set of Art Johnsons 94" P-38 plans and am considering building the plane as a profile. I could cut the wing cores from foam. The booms and pod would be built from 3/4" pink foam sheeted with 1/8" balsa from the wing back and 1/8" ply forward, with hardwood blocks to handle the engines and gear. Sorta like the old control-line profiles. Maybe just build-up the tail surfaces with sticks and sheet, or just open frame-work. I am thinking a pair of .91 4-strokes and fixed gear with 1/4" wire. Cover the whole thing in iron-on film.

Just as a test, I laminated a 2"x 16" piece of 3/4" pink foam with 2 pieces of 1/8" balsa. I was suprised by just how strong it really is. The first pic is a shot of the laminated part. In the second pic, it has 20lbs of batteries setting on it and it does not bend much at all. I feel this may work real well.
I think I can use 1/8 aircraft ply for the sides on nose of the booms and pod, with hardwood set into the foam to mount the gear and engines to.

Any thoughts?
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