SOAPdrones variable pitch quadcopter uses petrol power for heavy-lifting endurance [feedly]

What does it take for a quadcopter to carry a 10-kg (22-lb) payload and fly for three hours straight? It takes petrol power – and a clever variable pitch rotor system that makes this gas-powered drone just as stable, quick and responsive as its electric brethren. Scaled up, it could carry 200 kg (441 lb), which is more than enough lifting power for a manned multirotor.

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http://newatlas.com/soapdrones-variable-pitch-multirotor-endurance/48202/
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