Dornier Do P.407 helicopter

[hesham]

From my dear Stingray,

Designed 1966,at the end of the development, the engineers had been studying a fast helicopter for 35 passengers and a cruising speed of 500 km/h (270 kt). Power: two engines Rotor: four-bladed main rotor and the three bladed propeller Capacity: four seats

http://stingraysrotorforum.activeboard.com/t36256626/dornier/?page=2
http://img834.imageshack.us/img834/849/dornier.png
http://www.aiaa.org/tc/vstol/unbuilt/dornier/index.html