Too much caffeine today posted the video of his "ChopperBot". ChopperBot lets you "pilot" a helicopter on the end of a crane arm - forwards and backwards, up and down - all controlled with the touch sensor and the buttons on the NXT brick. Features include:
- No matter what altitude the helicopter is at, it is always level
- The helicopter's rotors turn due to the transmission of power up the arm
More info can be found at his website: http://www.way2muchcaffeine.blogspot.com/, as well as the .ldd file (when posted)