Aerodynamic Turning Model
I do understand the problems with profile drag -and wetted area etc..
But -in our small models -I really think that induced drag is still the real culprit.
I once fretted over intersections -leading edge shapes -etc.. for aerobatic stuff- bottom line - It was all nice purty up stuff -but had little to do with how the model performed.
I raced a little - my stuff worked well - but I was not an ardent racer -