Cierva W.11 Air Horse three-rotor helicopter from the late 1940s. Two were built.
Previously:
Piasecki HRP Rescuer tandem rotor helicopter - photos
Bell 47B-3 crop dusting helicopter - photo
Breguet G.111 coaxial rotor helicopter - photos
Cierva W.9 experimental helicopter - photos
Aerotecnica AC-12 light helicopter - photo and video
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