Welcome back to another episode of No Dumb Questions! Jeff Braun and I sit down to answer your questions, and we promise – there are no dumb questions, maybe just some dumb answers.   On this episode, Ross answers how a driver can clear his/her mind of finding the same person repeatedly and running his/her own race, and Jeff answers what speed “aero” downforce starts happening.   Jeff is one of the very best race car engineers in the world. He’s engineered cars at every level, and every type: NASCAR, karts, club racing cars, Indy, GT and Prototypes, and even Top Fuel dragsters. But what sets Jeff apart from many engineers is how he can explain what he’s doing, what a car is doing, and even how the best think.