Would it be possible to develop an R/C controller for a hobby aircraft using XBees in place of the Bluetooth modules? There would have to be very little delay for such a thing to work, and since I am very much a novice I don't really know how to determine if it would be feasible.
I don't see why it wouldn't be feasible, other than maybe the range. I dont know for sure how far a Xbee can go, but yea it is possible. Are you talking about airplanes or blimps? If you want to control an airplane, then you need to get an Xbee that can go FAR.
Are you tring to make a controller for an existing RC receiver, then I don't know if that is possible. But Arduino to Arduino would absolutely work, as I showed.