Twin-turbine helicopters

military helicopter by AgustaWestland (currently Leonardo)

Medium-size utility helicopter by Eurocopter, later Airbus Helicopters

light utility multipurpose helicopter by Eurocopter, later Airbus Helicopters

transport helicopter family by Sikorsky

airlift helicopter series by Sikorsky

attack and armed reconnaissance helicopter

utility helicopter family by PZL-Świdnik

multi-role helicopter family by Westland

1950s British military helicopter

1974 transport helicopter family by Sikorsky

Russian helicopter

multi-role helicopter series by the Sikorsky Aircraft Corporation

experimental high-speed compound helicopter

medium utility helicopter

military helicopter by AgustaWestland, later Leonardo

1959 military helicopter family by the Kaman Corporation

1997 utility helicopter series by Eurocopter (later Airbus Helicopters)

light twin-engine utility helicopter

search and rescue helicopter series by the Sikorsky Aircraft Corporation

1958 utility helicopter family by Westland

south korean multi-role utility helicopter

utility helicopter

helicopter by AgustaWestland, later Leonardo Helicopters

multi-role helicopter series by the Sikorsky Aircraft Corporation

series of utility helicopters

1975 prototype attack helicopter model by Bell Helicopter

Chinese helicopter

military transport helicopter

helicopter model by AgustaWestland, later Leonardo Helicopters

US experimental hybrid helicopter/fixed-wing aircraft

1962 transport helicopter family by Sikorsky

experimental aircraft by Piasecki Aircraft

1979 helicopter family developed by Aerospatiale and currently built by Airbus Helicopters

multi-purpose light helicopter

attack helicopter developped by Leonardo

American medium-lift helicopter

American twin-engine heavy lift helicopter prototype

utility helicopter model by Bell Helicopter

attack variant of the HAL Dhruv helicopter

experimental co-axial compound helicopter

1974 utility helicopter prototype model by Boeing Vertol

anti-submarine naval helicopter

utility transport helicopter

prototype attack helicopter

multi-role helicopter family by Sikorsky

military transport helicopter

transport helicopter by Frank Piasecki

type of aircraft

transport helicopter family by Kamov

helicopter prototype by Piasecki Aircraft

projected twin-turbine civil utility helicopter

type of aircraft

Iranian attack helicopter

utility helicopter prototype

multi-role ship-board naval helicopter

1985 experimental helicopter model by Bell Helicopters

Japanese version of the SH-60 helicopter

Polish helicopter

1964 experimental VTOL helicopter model by Hughes

type of aircraft