Dragonfly DF1: The Zero Emission Helicopter with Rockets
Geschreven op 16-3-2010 - Erik van Erne. Geplaatst in Vervoer en OVInstead of using a fixed motor attached to the body of the helicopter to drive the blades, rocket helicopters have small rocket motors located at the tips of the blades.
The rockets propel the rotors directly, reducing vibration and providing much improved stability. Best of all, because there is no motor torque, a tail rotor is only required to rotate the helicopter, not prevent it from death-spiraling into the ground.
The Dragonfly builds on all this research and wraps it up into a very portable, ultra-light helicopter. It’s powered by a pair of hydrogen peroxide rocket motors made by Tecaeromex.
Source: Redferret