> > I thought winglets recovered waste energy derived from induced drag, that > is, the wing tip vortices. Is not induced drag greatest at large angles of > attack viz. usually at low speeds? Obviously, on balance, the recovered > energy over all flight attitudes is worth the manufacturers while. > I'd have to agree with John's comments, though I'm not so technical.
I come from a gliding back ground and have flown a glider without winglets which was then retro fitted with them. (A Hornet single seat glider) Improvement in aileron control at low speeds was the most significant improvement. Initial and final ground roll. During thermalling the Hornet had a tendency to drop a wing and this was greatly reduced, also climbing performance was improved while thermalling. There is an Aussie KR2 builder who is building winglets for his aircraft and I'll be looking at these with in the next couple of weeks the see about retro fitting to my KR2, which I've just bought second hand. Regards Barry Kruyssen bg...@tpg.com.au Australia
