:o I stumbled across these cool videos while surfing the www.aafo.com site. The videos are of John Penny talking to a group of USAFA Cadets during the 2009 Air Races at Reno. He gets pretty technical about aerodynamics, props and stuff. I enjoyed the details, especially when he described one configuration of Rare Bear that required him to push the stick down in the turns and pull during the straights one year during the race - yikes. He also talks about the infamous three blade prop.

Part one.
http://www.youtube.com/watch?v=Gd6Cjpo2nNg

Part two.
http://www.youtube.com/watch?v=CIAdRlChmpg

Part three.
http://www.youtube.com/watch?v=B9IgXJ-rrag