Corrugated plastic model - Page 2 - RC Groups
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Jan 28, 2013, 10:30 PM
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I have always built the gnat and SNS with 4mm coro. I figured the wing would be stronger with span wise flutes.
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Feb 08, 2013, 10:15 AM
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ozmo01's Avatar

spad stuff

OK check out as recomended before. Both flute directions have been used depending on the model. Flutes going chord wise arch better for the wing top curvature. A piece of span wise coro is often inserted as the aileron so the flute can be cut to make the aileron hinge...just depends on the bird.
Coro weight can be an issue, however birds in the larger 40 and up size can be made with resonable weights. For example the 40 size spad trainers are just fine weight wise, ( Spadet and Debonair) I would recomend either as a first plane.
Wing folding without warping is an art and is best done with a spare set of hands. So call your flyin buddy and "eat the cost of a pizza" ... save the box!

used signs are more fun, especially politcal signage!!!
Mar 25, 2013, 10:51 AM
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Around 1976 or so, our club in PA purchased a Flying Lawnmower balsa kit, and one of our members built it. Only our top flier had the nerve to fly it. It was very stange to see it fly. On one landing things went wrong and the Mower was totaled. Nothing but toothpicks left. After I first learned about building planes from Coroplast plastic material, and started building them, I thought about that old Balsa Flying Lawnmower. It looked like a perfect match, because the Coroplast was so much more rugged. I designed one, built it, tested it, made changes, then built a new model incorporating all of the changes. I flew the new model for about 5 years. Eventually it had a major electronic failure and was totaled. Actually, there is no damage to the Coroplast, so it can be rebuilt. At age 77, I have difficulty working up the enthusiasm for a heavy project. Here is a photo of it in the air.
Apr 11, 2013, 04:45 PM
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Here are a couple of more Coroplast R/C planes:

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