Helicopters

Sikorsky Aircraft Corporation · utility helicopter model by Sikorsky

Subaru · military utility helicopter model by Subaru, based on the Bell 412EPI

Kaman Corporation · military utility helicopter model by Kaman

Kaman Corporation · military utility helicopter model by Kaman

Mitsubishi Heavy Industries · model of helicopter

Sikorsky Aircraft Corporation · military utility transport helicopter

Piasecki Helicopter Corporation · experimental helicopter by Vertol, later Boeing

Curtiss-Wright · 1958 quadrotor helicopter prototype model by Curtiss-Wright

Westland Aircraft · 1948 utility helicopter series by Westland Aircraft

Westland Aircraft · utility helicopter model by Westland

Westland Aircraft · 1955 utility helicopter by Westland

Boeing Rotorcraft Systems · experimental heavy-lift helicopter by Boeing Vertol

Piasecki Helicopter Corporation · 1948 prototype helicopter model by Piasecki Helicopter Corporation

Sikorsky Aircraft Corporation · prototype observation helicopter model by Sikorsky

Hiller Aircraft Company · 1951 prototype observation helicopter model by Hiller

Pennsylvania Aircraft Syndicate · prototype observation autogyro model by the Pennsylvania Aircraft Syndicate

Bell Textron · pre-production military helicopter

Yakovlev · 1950s transport helicopter by Yakovlev

Changhe Aircraft Industries Corporation · attack helicopter

Harbin Aircraft Manufacturing Corporation · 1959 helicopter family by Harbin

Central Aerohydrodynamic Institute · Soviet autogyro, was created at the beginning of the 1930s