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#21
October 28th 16, 08:15 PM
posted to rec.aviation.soaring
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Blow holes vs turbulaator tape.
We’ve gone from a NACA duct with an airspeed-sensing servo to turbulator tape on our ASH-25 EB28 and it seems fine. I think the Binder factory did a lot of comparison testing and the extra weight and complexity of the blown wing didn’t make it worthwhile, as long as you got the tape in the right place...
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#22
October 29th 16, 10:07 AM
posted to rec.aviation.soaring
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Blow holes vs turbulaator tape.
On Wednesday, 26 October 2016 21:20:09 UTC+3, Eric Greenwell wrote:
Schleicher uses two layers of zig-zag tape just in front of the NACA inlets that pressurize the control surface blowholes. A single layer is not thick enough to trip the laminar flow that far back on the airfoil. Ok. Blow holes seems amazingly expensive and complicated construction when compared to simple tape. I have very hard time believing that Waibel, Heide et al. did this without any benefits. I have to confess that I have more believe in their collective aerodynamic wisdom than this groups', no doubt impressive it might also be.
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