That's why I request software support for CoD
A very large motor may not be necessary, it depends on the transmission ratio; a relatively small motor spinning 10K rpm starts a car or truck engine. Although a higher ratio means more friction and inertia this might not be a problem, since real rudders and their control mechanisms have mass, thus inertia, and I can imagine that even when the plane is parked the moving of the rudder displaces a lot of air.
I'm interested in your design, do you have any pictures and a description? I'm building my own pedals, currently without force feedback in the design but I might alter it if I like the idea and support appears.