Kay 331 gyroplane (British) : all-metal single-seat light rotor plane
This is a 1935 NACA Aircraft Circular, No. 198, describing the British Kay gyroplane 331, a single-seat all-metal light rotorcraft, issued by the National Advisory Committee for Aeronautics for aviation engineers and researchers. The pictures pair a technical general-arrangement drawing and component detail sheets with photographs of the aircraft and its rotor hub and pylon, showing an aeronautical engineering record. A designer might draw on the precise line drawings and the early mechanical hardware for vintage technical illustration and machine-diagram styling.
