RE: computer controlled autopilot?
Why do you want to use the aircraft radio? Use something like WifI. You can get [potentially] greater range, greater bandwidth, and it's in the legal range. You'll get bored of your project, though, because it's a very common thing that many people do. A UAV is the obvious next step, but discussion on that is not allowed on RCU, or as I like to call it, GestapoU.