Why don't wings have dimples 2

On Oct 22, 12:38*pm, jan olieslagers
wrote:
Dancing Fingers schreef:

The thing of it is that the car they used, as I remember, also had a
very aerodynamic shape and it still helped.

Hm. Define "very aerodynamic"? Perhaps "more aerodynamic than most cars"
* which would still be far from the average aeroplane?

I recall a salesman trying to sell a bunch of hail damaged airplanes
by saying they went faster because the dents produced a "golf ball
effect". I don't think he got many buyers.

Aerodynamisists have been trying to create "surface treatments" to
improve laminar flow for a century. So far, the mirror smooth
surfaces of sailplanes are best.

There is a guy, a Dr. Sinha, (http://sinhatech.com/) claiming to have
something called a "deturbulator" which is a sort of flexible tape
stuck on wing surfaces. If it works, and survives the rigors of
actual flight operations, it might be a big deal. I wouldn't hold my
breath.

"bildan" wrote in message
...
Aerodynamisists have been trying to create "surface treatments" to
improve laminar flow for a century. So far, the mirror smooth
surfaces of sailplanes are best.

There is a guy, a Dr. Sinha, (http://sinhatech.com/) claiming to have
something called a "deturbulator" which is a sort of flexible tape
stuck on wing surfaces. If it works, and survives the rigors of
actual flight operations, it might be a big deal. I wouldn't hold my
breath.

Actually turbulator tape is fairly common stuff on sailplanes In comes in a
zig-zag pattern or with dimples. Scroll halfway down this page to see the
stuff: http://www.wingsandwheels.com/page29.htm
Google "sailplane turbulator tape" for more info.

Vaughn

"vaughn" wrote in message ...

"bildan" wrote in message
...
Aerodynamisists have been trying to create "surface treatments" to
improve laminar flow for a century. So far, the mirror smooth
surfaces of sailplanes are best.

There is a guy, a Dr. Sinha, (http://sinhatech.com/) claiming to have
something called a "deturbulator" which is a sort of flexible tape
stuck on wing surfaces. If it works, and survives the rigors of
actual flight operations, it might be a big deal. I wouldn't hold my
breath.

Actually turbulator tape is fairly common stuff on sailplanes In comes in a
zig-zag pattern or with dimples. Scroll halfway down this page to see the
stuff: http://www.wingsandwheels.com/page29.htm
Google "sailplane turbulator tape" for more info.

Vaughn


It should be noted the exact placement location of "sailplane turbulator tape" varies dependent on the airfoil. The first turbulator tape I place of my HP-14 ruddervators was the "dimpled" variety. (It is less expensive then the zig-zag.) I couldn't see much improvement. That wasn't the case when I upgraded to zig-zag. I only have turbulator tape on the ruddervators. Adding turbulators to the wing airfoil has shown only marginal performance improvement, so I haven't bothered.

Wayne
http://tinyurl.com/N990-6F