Hello all... I'm new to Physics Forums so I'm not sure if I'm posting this in the correct area but here goes anyway... I'm interesed in designing a high performance composite GA (general avaiation) aircraft but need some assistance with selecting a good design software. I'm primarily interested (at least in the beginning) finding software that will allow me to select an airfoil (such as the GA airfoils by Harry Riblett) and then determine the optimum airfoil thickness to provide the perfect cL, cM, & cD (as well as optimum wing area, angle of incidence, etc) for the aircraft. Speed & low drag are the goals... Cost is a factor as I'm merely interested in designing a new wing to improve performance on a experimental Glasair III that I own. Thanks in advance for the help.