Almost or many RC airplane enthusiast dream of having their favorite full size replica to bore holes in the sky. But it will not be easy just to copy the exact dimension of the full size airplane and then scale it down to what ever you desire, like for example 1/8 scale, scale so forth and so on. Even though you know how to use CAD software to design and draw the airplane, without considering the aerodynamic principles, you wont have a stable airplane. So this is the first step on how to fly scale model airplanes. It will be impossible to fly your scale model airplane without considering the aerodynamic design. Again, before you attempt to build & fly your very first scale model, you should have already build your skill to at least an intermediate level. Meaning, flying a non-scale shoulder wing design type of model airplane. Then choose the trainer type full-scale model airplane like the Cessna 150 or J3 Piper Cub.
At least those airplanes have a built-in stability design. The wings constant chord and rectangular (for J3 Piper Cub). High wing location, meaning the wings is above the fuselage, which have pendulum stability. Landing gear is tricycle type (for...