Buy a new old stock (5.66) version of X-Plane off E-bay for $5.

You will be asked to enter a parasitic drag number but the forces
beyond that will be calculated for you depending on the flight
surfaces you create and the air foils you pick or design.

Regards



"Brad Mallard" wrote in message ...
I am still in the design phase of my future plane. I would like to hear
opinions on design software, and even buy software that someone doesn't use
anymore.

Brad