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Yeah, Racer9, I would agree with you there. I don't think you can do much better when it come to strength/wieght ratio than Balsa.
You might get lighter with some thin foam or plastic, but I thick you would lose on the rigidity.
When I have the time and money to give this a go, I'll want the most rigidity I can get to allow for a LONG wingspan for a nice sloooow bird.
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