i was thinking, it'd be pretty neat if you could get a helicopter collision avoidance system. and I'm not talking about the ground, i mean avoiding things like trees and whatnot (now thats a bad example, because a collision avoidance system would be much more useful for indoor helis). anyway the idea is, a few lasers (range detectors of any sort i guess) aimed in various directions around the chopper, and when they detect an object too close (say, within 2 of the rotor tips, depending on speed though) it automatically avoids it. it'd be pretty useful because there are times when i myself would want to fly in pretty cramped spaces, and something like this would be very useful. anything like it exist? (i know the uav heli's have it... anyway to intergrate one of those sensors into it maybe?)

thanks -Matt