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HELICOPTERS
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keywords:(HELICOPTERS)
Theoretical mathematical discussion of aerodynamics of rotary blade flying machines
Aerodynamic analysis of gyroplane rotating-wing system
Theoretical mathematical discussion of aerodynamics of rotary blade flying machines
Gyroplane -- Its principles and its possibilities
Aerodynamics of Wilford gyroplane with special reference to maximum lift coefficients
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
Theoretical mathematical discussion of aerodynamics of rotary blade flying machines