17.03.2010 14:20 Uhr, Quelle: Engadget

Dragonfly jet-powered helicopter runs on H2O2, shuns traditional tail rotors (video)

Your average whirleybird is driven by a big motor in the middle, spinning the blades one way and, as per Newton, rotating the body of the craft the other. A tail rotor counteracts the force, but a more efficient solution is to have the rotors power themselves, which is exactly how the Dragonfly DF1 works. It has tiny, hydrogen-peroxide jets on the blade tips, spinning them up without pushing the body of the helo in the other way -- though a small tail rotor is still needed to turn the craft. It's much like the tech that propelled James Bond toward his waiting DB5 in Thunderball, but unlike that jetpack this copter can fly for up to 50

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