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The Sikorsky SH-60/MH-60 Seahawk (or Sea Hawk) is a twin turboshaft engine, multi-mission United States Navy helicopter based on the United States Army UH-60 Black Hawk and a member of the Sikorsky S-70 family. The most significant airframe modification is a hinged tail to reduce its footprint aboard ships.

The Bell 214ST is a medium-lift, twin-engine helicopter descended from Bell Helicopter's ubiquitous UH-1 Huey series. Though it shares a type number with the somewhat-related Bell 214, the 214ST is larger and of quite different appearance.

 

Design and development

The Bell OH-58 Kiowa is a family of single-engine, single-rotor, military helicopters used for observation, utility, and direct fire support. Bell Helicopter manufactured the OH-58 for the United States Army based on the 206A JetRanger helicopter. The OH-58 has been in continuous use by the U.S. Army since 1969.

Sikorsky Aircraft was awarded the US Army's Utility Tactical Transport Aircraft System (UTTAS) contract in 1976 to develop a helicopter to replace the Bell UH-1 Iroquois that had entered service in the 1960's. The first production aircraft (UH-60A) was flown in October of 1978 with the US Army taking delivery of its first Black Hawk in that same month. A total of 1,048 UH-60As were built for the US Army between 1978 and 1989, when production of the UH-60L was initiated.

The highly manoeuvrable Apache AH-64D attack helicopter can be deoployed for a wide range of missions. It has advanced observation and navigation systems, making it extremely well suited for reconnaissance missions.

Designed in 1972 to meet the US Army's need for an AAH (Advanced Attack Helicopter), the AH-64A has taken over the mantle of the world's premier attack helicopter from the Bell AH-1 HueyCobra. The first Hughes YAH-64 prototype flew on 30 September 1975, the programme coming under the jurisdiction of McDonnell Douglas from August 1985 and Boeing from 1997.

The Bell UH-1N Twin Huey is a medium military helicopter that first flew in April, 1969. The UH-1N has a fifteen seat configuration, with one pilot and fourteen passengers. In cargo configuration the UH-1N has an internal capacity of 220 ft³ (6.23 m³). An external load of 5,000 lb (2,268 kg) can be carried by the UH-1N. The CUH-1N (later CH-135) Twin Huey was the original version, first ordered by the Canadian Forces.

 

The Bell 222 is a twin-engined light helicopter built by Bell Helicopter. The Bell 230 is an improved development with different engines and other minor changes. A cosmetically modified version of the 222 was used as the titular aircraft in the US television series Airwolf.

 

Development

The Bell 407 is a four-blade, single-engine, civil utility helicopter; a derivative of the Bell 206L-4 LongRanger. The 407 uses the four-blade, soft-in-plane design rotor with composite hub developed for the United States Army's OH-58D Kiowa Warrior instead of the two-blade, semi-rigid, seesaw, rotor of the 206L-4. The Bell 407 is frequently used for corporate and offshore transport, as an air ambulance, law enforcement, electronic news gathering and movie making.

 

The Bell 412 is a utility helicopter manufactured by Bell Helicopter. It is a development of the Bell 212 model, the major difference being the composite four-blade main rotor.

 

Design and development

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