I saw a video of a guy flying a small RC 'copter with the N900, in that case he was using the infrared emitter ('cause of the range most of the flight time was in the " 'till someone looses an eye" region).


Many remote control choppers got a gyroscope and the electronics in it pilot the helo keeping it steady, the signals received from the remote are used as "suggestions", the electronics try keep it steady and perform the movements indicated by the signal (some rc helos only automate the tail rotor, compensating changes in torque in the main rotor but leaving the rest alone); there are also some more toylike rc helos that use counter rotating rotors doing away with the need for a tail rotor; also there are some that just got throtle and yaw controls with some gearing to make the tail rotor always compensate for the torque and due to how they are balanced it always goes forward and always keep the right side up; pretty much all of the toylike ones don't got colective controls, they just change the speed the rotor spins.


I've seen a video where some guys are driving a RC car with a N900 using the accells kinda like on racing games on the Wii, i think they used WiFi, or perhaps it was bluetooth, either way they had custom made hardware and software to do it.


But i don't think they actually used anything like that in the video, looks like the guy just held his N900 while someone flew the chopper, the way it maneuvered, even though the N900 might be able to send commands for all the motions, no way it would be possible to someone to control a life sized helo with a N900 from the ground like that without crashing, doesn't matter how skilled you are.