Originally Posted by

**loopy** G'Day all, I'm looking for a decent CAD program that I can use to model a few designs I have on paper. Ideally, the sort of program I'd like would be: a) Easy to use b) Cheap! c) Have the facility to accurately model airfoil sections d) Able to integrate with a CFD program to calculate lift, pressure and drag coefficients for a design e) Able to perform "aeronautical" calculations on a design, such as calculating wing area, wetted area, etc f) Able to save in a format compaitble with a CNC mill or lathe Any help would be greatly appreciated, Brad