Groen Brothers starts work on high-speed VTOL Heliplane for DARPA

[Rotor_Head]

Gyroplane developer Groen Brothers Aviation (GBA) has begun designing a high-speed, long-range vertical take-off and landing (VTOL) aircraft under a US Defense Advanced Research Projects Agency (DARPA) contract.



http://www.flightinternational.com/Article...iplane+for.html