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HELICOPTERS
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keywords:(HELICOPTERS)
Recent European Developments in Helicopters
The actual state of the helicopter problem
The helicopter and the variable pitch propeller
Will captive helicopters replace the observation balloon?
Air travel with special reference to the helicopter
Successful helicopter trials at McCook field
My experience with helicopters
First helicopter to fly a circular kilometer
Model tests on the economy and effectiveness of helicopter propellers
"Helioplane" developed by resident of New Westminster, B. C.
Aerodynamics of Wilford gyroplane with special reference to maximum lift coefficients
Aerodynamics of Wilford gyroplane with special reference to maximum lift coefficients
Aerodynamic analysis of gyroplane rotating-wing system
Nouvel Appareil a voilure tournante -- l'helicoptere Florine
Rotating-Wing Aircraft Compared to Conventional Airplanes
Kay 331 gyroplane (British), all-metal single-seat light rotor plane
Wind-tunnel tests of 10-foot-diameter gyroplane rotor
Notes on problems and progress of gyroplanes
Kay 331 gyroplane (British), all-metal single-seat light rotor plane