AoA isn't really much use in a GA application. However, it would be very useful to have an AoA audio tone at Cl max for aerobatics or max rate turns!! Buffet nibble bleeds energy, so just short of that value of AoA would be quite helpful in some hard manoeuvring applications.
An AoA gauge is probably the simplest instrument in the world to construct - or at least that's what I was told at Cranfield in 1971!! Not much of a research project, I'm afraid!! Now a basic weight and balance display based on strain gauges in the undercarriage - that would be very helpful and might save lives. I did the theoretical calculations back in the 70s but never got round to finishing the project
[This message has been edited by BEagle (edited 27 February 2000).]