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During late 1956, the United States Department of the Army announced its intention to replace the Sikorsky CH-37 Mojave, which was powered by piston engines, with a new, gas turbine-powered helicopter. [2] Turbine engines were also a key design feature of the smaller UH-1 "Huey" utility helicopter.
The further-developed Cobra 2000 proposal included the General Electric T700 engine and a four-blade rotor. While Bell's proposal did generate some interest within the US Marine Corps, funding was not forthcoming to pursue its development at that time. During 1993, Bell opted to enter an AH-1W-based variant for the UK's new attack helicopter ...
The helicopter was designated "CH-53A Sea Stallion" and delivery of production helicopters began in 1966. [5] The first CH-53As were powered by two General Electric T64-GE-6 turboshaft engines with 2,850 shp (2,125 kW) and had a maximum gross weight of 46,000 lb (20,865 kg), including 20,000 lb (9,072 kg) in the payload.
The Sikorsky CH-53K King Stallion (Sikorsky S-95) [2] is a heavy transport helicopter designed and produced by Sikorsky Aircraft.The King Stallion is an evolution of the long running CH-53 series of helicopters which has been in continuous service since 1966, and features three up-rated 7,500 shp (5,590 kW) engines, new composite rotor blades, and a wider aircraft cabin than its predecessors.
The Bell UH-1N Twin Huey is a medium military helicopter designed and produced by the American aerospace manufacturer Bell Helicopter.It is a member of the extensive Huey family, the initial version was the CUH-1N Twin Huey (later CH-135 Twin Huey), which was first ordered by the Canadian Forces in 1968.
Production of a further 17 aircraft was planned [needs update] to begin in 2020. [11] [13] The total FY2015 program cost is $4.718 billion for 23 helicopters, at an average cost of $205M per aircraft. [14] In July 2016, the design passed its Critical Design Review, clearing it for production. [15]
The Z-10's engine system is fitted with the Hover Infrared Suppression System (HIRSS), mixing in the engine exhaust with cold air to reduce the helicopter's infrared characteristic. [27] Later serial production of Z-10 modified the engine nozzle from sideway-facing to the upward-facing direction, further reducing the signature from heat radiation .
The Bell 212 (also known as the Bell Two-Twelve) is a two-blade, twin-engine, medium helicopter that first flew in 1968. Originally manufactured by Bell Helicopter in Fort Worth, Texas, United States, production was moved to Mirabel, Quebec, Canada in 1988, along with all Bell commercial helicopter production after that plant opened in 1986.