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Importance of wing AR?

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Peter_Frank
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Re: Importance of wing AR?

Postby Peter_Frank » Sat Sep 30, 2017 7:27 pm

geron wrote:
Fri Sep 29, 2017 9:58 pm
Thank you Peter; I wonder what would be the characteristics of a very low aspect wing 1-2, with a very high surface area (1000 cm2) and a very low chord ratio (1-15)?
I want to think that it would be a wing that you could go very slow with a high angle of atack (more back foot pressure) but you could also go ver fast since it would not generate too much drag (because of the low chord ratio)

Yes, in theory you are right.

But why do you want that ?

You can not ride fast if you are not good and experienced...

And when you are, you dont want such an inefficient wing (low AR) that goes bad upwind and high drag/low speed upwind.

What you see on existing wings are the opposite - the high AR wings are the thin ones, and the low AR wings are the thick and/or cambered ones.
This makes much more sense, to support what one want to do with a given AR usually :D

8) PF

geron
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Re: Importance of wing AR?

Postby geron » Sun Oct 01, 2017 4:16 pm

I see your point but, then you get the slow wings or the fast wings. I want a wing that can go slow and fast; the low chord ratio makes the low aspect ratio wing less restrictive (or draggy) where trying to go fast and the high surface area makes it possible to glide at low speeds?
Also, the low aspect ratio makes it easier to ride?

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Peter_Frank
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Re: Importance of wing AR?

Postby Peter_Frank » Sun Oct 01, 2017 9:48 pm

geron wrote:
Sun Oct 01, 2017 4:16 pm
I see your point but, then you get the slow wings or the fast wings. I want a wing that can go slow and fast; the low chord ratio makes the low aspect ratio wing less restrictive (or draggy) where trying to go fast and the high surface area makes it possible to glide at low speeds?
Also, the low aspect ratio makes it easier to ride?

Yes, you can make a thinner wing with more area and very low AR so it can turn okay - would work.

But IMO it does not make sense, because, a smaller area and a bit more lifting (thicker/cambered) wing, will have precisely the same low end and overall drag - well in fact it will have less drag, as it can have a bit higher AR but not more span (remember it is smaller in area/size), so it has less induced drag actually, and turns as fast or a tad faster than your thin ultra low AR wing.

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Re: Importance of wing AR?

Postby geron » Mon Oct 02, 2017 12:33 am

Yes, well; even though this wing that you propose could be more efficient at lower speeds, it won't generate as much drag as the speed increases and it would get a speed in which it would be more eficiente?


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