COvers the various versions of the 'rigid' rotor XH-51A and subsequent civil versions known as the Model 286
COvers the various versions of the 'rigid' rotor XH-51A and subsequent civil versions known as the Model 286
September 29, 1962
XH-51A (3 blade configuration) :
First flight of the Lockheed XH-51A
September 21, 1964
XH-51A Compound :
First flight of the Lockheed XH-51A Compound