GT wing effectiveness...anyone experimented?
#81
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Originally Posted by mikegarrison,Jul 9 2008, 04:32 PM
If the flashing material is cheap enough, you can always just reskin the wing every so often, unless the design is such that it's a real PITA.
#82
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Jack, how thick is this ".86 gauge" anyway?
Flashing seems to be sold in both inch thickness (ie. .0120") or ".86 gauge" or ".92 gauge" or even "standard gauge". I'm guessing that might actually be .0086 inches, but I haven't been able to confirm that.
Standard sheet metal gauges are things like "24 gauge", which in aluminum is .02".
Flashing seems to be sold in both inch thickness (ie. .0120") or ".86 gauge" or ".92 gauge" or even "standard gauge". I'm guessing that might actually be .0086 inches, but I haven't been able to confirm that.
Standard sheet metal gauges are things like "24 gauge", which in aluminum is .02".
#83
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#84
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When you get the wing made from foam, have them cut 2 x 1" lengthwise vertical slots from tip to tip.
Place the slots at the 1/3 and 2/3 chord length position, or there abouts.
Then you can add a 1" diameter pipe, tip to tip, in each of the 2 slots.
That will provide all the stiffening you need along with mounting points internal to the wing.
This is a common build technique in model aircraft designs.
Place the slots at the 1/3 and 2/3 chord length position, or there abouts.
Then you can add a 1" diameter pipe, tip to tip, in each of the 2 slots.
That will provide all the stiffening you need along with mounting points internal to the wing.
This is a common build technique in model aircraft designs.
#85
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Depends on how thick your airfoil is, but 1" may be too big to fit. I'm sure it's more than is necessary for strength.
Also, I would put my main spar at 1/4 chord. That tends to be approximately where the center of lift ends up.
Also, I would put my main spar at 1/4 chord. That tends to be approximately where the center of lift ends up.
#86
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Originally Posted by mikegarrison,Jul 9 2008, 02:32 PM
If the flashing material is cheap enough, you can always just reskin the wing every so often, unless the design is such that it's a real PITA.
I don't mind the little dents at all. But if someone tries to push the car by the wing the way they do in the pits at a real race, I'd be in trouble.
And by 1/4 chord, do you mean 1/4 of the way from the leading edge?
And vjarnot, there's no pressure. If I made progress on this in the next four months or so, I'd be surprised. Lots of other projects in line ahead of the 2.0 version of my wing.
Still, that insulation foam seems like a cost- and time-effective way to start a wing.
#87
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Originally Posted by JackOlsen,Jul 9 2008, 11:17 PM
And by 1/4 chord, do you mean 1/4 of the way from the leading edge?
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Originally Posted by davepk,Jul 9 2008, 03:24 PM
When you get the wing made from foam, have them cut 2 x 1" lengthwise vertical slots from tip to tip.
Place the slots at the 1/3 and 2/3 chord length position, or there abouts.
Then you can add a 1" diameter pipe, tip to tip, in each of the 2 slots.
That will provide all the stiffening you need along with mounting points internal to the wing.
This is a common build technique in model aircraft designs.
Place the slots at the 1/3 and 2/3 chord length position, or there abouts.
Then you can add a 1" diameter pipe, tip to tip, in each of the 2 slots.
That will provide all the stiffening you need along with mounting points internal to the wing.
This is a common build technique in model aircraft designs.
Back on topic, I was able to get the guys at the foam place Jack mentioned to cut me both cores of a 2-element wing I had designed by "some guy in the UK". I got the main element finished, but priorities shifted before the wing was completed, so now it's a wing in need of a car. (No it's not for sale).
http://forums.freshalloy.com/showpost.php?...0&postcount=277
#90
Originally Posted by jzr,Jul 10 2008, 09:51 PM
Back on topic, I was able to get the guys at the foam place Jack mentioned to cut me both cores of a 2-element wing I had designed by "some guy in the UK". I got the main element finished, but priorities shifted before the wing was completed, so now it's a wing in need of a car. (No it's not for sale).
http://forums.freshalloy.com/showpost.php?...0&postcount=277
http://forums.freshalloy.com/showpost.php?...0&postcount=277
Dino