I believe Stef is asking how far forward the tubes should protrude. Certainly ahead of any disturbed air, but how far is that? Perhaps we can refer to the nice colored CFD simulations that were developed when the new airfoils were developed, and guesstimate how far forward the tubes need to be as a fraction of wing chord? The only such image I could find in a quick search of the KRNet.org site was the very first one, here: http://www.krnet.org/as504x/ . It's not very definite. I thought there were a whole series of such images, from level cruise to past full stall. Mark-?
Oscar Zuniga Medford, OR
