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Old 05-04-2006, 01:01 PM
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Default RE: 1/2a speed plane wing design

Chris, I've built a few planes for the G&Z. The easiest way to build a wing for one of these is to use 1/4" thick balsa sheet, razor plane and sand it to a smooth flowing shape on top only. An airfoil this thin doesn't need any symmetry to fly just fine. I will sink a full depth spruce spar in the inner 2/3rds of the wing span, like 1/4"x 3/16". The rough dimensions for the wing work out to 6 " root chord, 4" at the tips and anywhere from 24 to 30 inches of span. Are you fully enclosing your pipe? The lightest G&Z racer that I've ever built [with enclosed pipe] came in at around 15 ozs. To reduce frontal area as much as possible, the fuselages are all fiberglass. I did a build thread in the 1/2A forum called, "G&Z EXPRESS", or something like that.

Here are some examples of SWRs [sheet wing racers]. If you look at the electric speed forums, they have some good examples to follow, I think the racing category is F5D?
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