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Old 05-14-2005, 12:57 PM   #11
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I am not an engineer but maybe will talk to my son as he is. But I always maintained if you pull a high G turn and stress the wing I would sooner have a touch of flex than be rigid. I made a 48" wing using epoxy one time for a F1 and then placed it between to chairs and gingerly stepped on it feeling it would let go. It flexed about an inch and when I got off it was back in shape. The only reason I asked is I have seen wings fold a few times and they make good lawn darts after. Expensive on engines and electronics.
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Old 05-14-2005, 06:21 PM   #12
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Wings fail because the center section hasn't been constructed properly.

I think you want some flex but not too much. If you have too much in you wing than when you turn or pull a positive G maneuver the wing geometry is going to change. You don't what the wing geometry to change because that will affect your trim etc. Pylon racers try to make there wing as stiff as possible because when then pull High-G turns if the wing flexs then they lose energy which results in them losing speed........thats the theory.

Construct the wing according to the instructions and common sense and don't worry about it.

Mike Sebastien
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Old 05-14-2005, 09:24 PM   #13
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Originally Posted by airframe
I think what is important is too distribute the weight evenly and have enough so the sheeting doesn't lift as the glue cures. How much weight required? I haven't got a clue. I just keep adding weight until I hear the foam buckling and then take some off..........just kidding. Just keep putting it on until it looks like you have enough.

Chad might be able to figure it out as he is a Engineer.
Yo! Chad, where you at?

I've sheeted foam wings once before. Strangly enough, they were for the same kit that I'm building now. Last time I used 3 hour epoxy and piled old telephone books about eight high for weight. The wings are fairly small, about 50" wingspan with an 7" fuse in the middle. The first set of wings came out great using epoxy. I'd like to do the new set with polyurathane, but am concerned with how much weight to use.

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Old 05-19-2005, 03:55 PM   #14
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Foam Glue

Well I sheeted the one side just waiting for the glue to dry on the other side so I can sheet it also The water base contact glue works like a dream .One thing I did have was a reasonable amount of over lap which can be trimmed later.I could see difficulties if you had to be bang right on first time but if you can be bigger with sheeting and trim gotta be the way to go.Thanks again I believe it was Vulcan 1 for the idea
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Old 05-19-2005, 04:21 PM   #15
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Gluing Foam cores

Hi Jim:

You might want to go to Bob Hudson's website,
he goes into how to sheet the cores for his Edge. If that link doesn't work, you can get to it from his main website,

Dennis DuBois
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