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Old 15 Jun 2005, 10:08 (Ref:1329116)   #1
Tainan
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Aerofoil construction

Has anyone on here ever made an aluminium aerofoil (wing)? How's it done? I guess its quite difficult folding the aluminium smoothly over the formers.
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Old 15 Jun 2005, 11:16 (Ref:1329157)   #2
ascarracinguk
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depends on how thick the ally you are using is and what diameter you want the leading edge....secret is to make a really strong frame inside, with the cross section of the wing several times across the span ive built one with a 20mm leading edge with 0.5mm ally before and could just bend the ally around the form by hand, then rivit it into place..usually help if youve got 2 preople though, one do rivit and one to hold it in place..
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Old 15 Jun 2005, 21:46 (Ref:1329914)   #3
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Try fibreglass?

Im going to make a carbon fibre diffuser in the next month!

Will post pictures of how, what etc etc!

Richard
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Old 16 Jun 2005, 08:05 (Ref:1330141)   #4
Tainan
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r_s: Can't use fibreglass - it has to be aluminium.
ascar: I was thinking along the same lines - the thinner the sheet, the easier it is to bend, but I guess its easy to crease too. All the same I think I'll give it a go - once I've got round to making the formers of course! I'm hoping to keep the frame as light as possible and fill it with foam - that's what's been done with my original. Good to hear you've done it that way - it gives me some hope!
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Old 16 Jun 2005, 10:28 (Ref:1330210)   #5
Bob Pearson
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We use grade NS4 Al/alloy 0.75mm thick. The choice of sheet grade and thickness depends , in part, on how much of the loads and any effects from shaking are being born by the surface of the wing. We found tha we could use SC1 ( which is almost pure aluminium) for the front wings with no structural failures, but if used on the rear wings would result in cracks
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Old 16 Jun 2005, 13:20 (Ref:1330353)   #6
Tainan
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Good point, particularly as mine's centre post mounted.
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