This report summarizes the flight test results of the Phase III four-bladed rotor testing on the XH-51A 'rigid rotor' helicopter. The object of Phase III was to evaluate the four-blade rotor in comparison with the three-blade rotor. Ground tests commenced on 13 July 1964 with the first flight on 21 July 1964. The phase was terminated on 3 October 1964 after 49 flights and 14.9 flight hours. (Author)
Preliminary Flight Test Data. Xh-51A Rigid Rotor High Speed Flight Program
1964
36 pages
Report
No indication
English
Aerodynamics , Aircraft , Helicopters , Flight testing , Rotor blades(Rotary wings) , Stresses , Vibration , Oscillation , Frequency , Fuselages , Reduction , Pitch(Motion) , Roll , Design , Bending , Moments , Stability , Hovering , Maneuverability , H-51 aircraft