John Roncz is a self-taught genius aerodynamicist who, among other things, designed the airfoils (wings) and propellers for virtually all of Burt Rutan's aircraft designs. (Of course, Burt is a design genius in his own right.) I stumbled across the following video on YouTube, a talk John presented at the annual Experimental Aircraft Association convention and fly-in in Oshkosh (WI) in 2011 ... a retrospective of more than 30 years of his career as an aerodynamicist. Pilots, engineers, and gearheads should all find this talk interesting and informative. Enjoy.
Some highlights: Designing the wings and propellers for
Voyager, Rutan's round-the-world-nonstop-without-refueling airplane that now hangs in the Smithsonian Air & Space Museum. An airfoil with a lift coefficient (C
L) ~ 4. (A C
L above about 2.8 was previously considered unattainable.) Another airfoil with drag coefficient (C
D) that actually
decreases in the transonic range, harnessing shock waves to help "push" the wing through the air.
I was particularly struck by one statement near the end, during the question-and-answer session. When asked about his recommendations for a young person interested in aero engineering as a career, John (who had early-on joked about his own lack of academic credentials) answered, in part, as follows:
“The young aero engineers who work for me today know more than I know … which is good … but I understand everything that I know.”[This message has been edited by Marvin McInnis (edited 06-06-2014).]