I was Dan Gurney's chief designer at AARin the 1970's and have been using VGs on airfoils and automotive applications ever since. I was also the one who introduced Gurney Flaps to the aviation world through Robert H. Liebeck at Douglas, Long Beach. My opinion is that there is rarely if ever any...
Hmmm... given the lack of responses to you question, I suspect the quickest way to arrive at solutions is to just go out and fly it - and take some parametric data that will reduce to a formula. My background is Indy Car design, and as you can imagine, we learn many things we don't publish...
A note from an old Indy Car designer: My good friend Miper, being an aircraft guy more than a car guy, is wrong about the rolling drag component of a car's total drag being of nearly fixed magnitude in his May 22 post. Goodyear Racing Division data shows that rolling drag changes approx...
Al, The NACA submerged inlet was my inspiration for my first VG patent in 1984. The idea was: If thetrailing edge of the floor of a NACA duct is made re-entrant with the original flow control surface, (instead of leading to the interior of the body to take air onboard) you have an exquisitly...
I've done hundreds of miles of coast down testing in an attempt to avoid $2,000+ per hour WT costs at Lockheed-Georgia. and find it extrememly frustrating. The scatter in the data is surprisingly large, which creates errors that render small drag changes difficult to find. By the way, at...
