OK, this might sound like a stupid question....

I am thinking of purchasing RealFlight G2 (or one of the other sims) both to help learn how to fly my Helli and fixed wing, and simply for fun in the winter. I also want my son to learn on this too.

At the moment I only have the models (not finished biulding them yet) and not the radio's, so, my stupid question is.........

do I need to have the model's radio transmitter to use one of these sims? I think I do for some, but what about RealFlight?

Thanks,