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An interim twin-engine conversion of a Model 214 flew on 15 February 1977 in Texas, [4] [5] Testing was successful, and Bell decided to press forward with a definitive twin-engine Bell 214ST, with a fuselage stretched by 30 in (76 cm) and a revised main rotor of greater diameter.
The Bell 214 is a medium-lift helicopter derived from Bell Helicopter's ubiquitous UH-1 Huey series. ... Main rotor area: 1,963.75 sq ft (182.438 m 2)
Bell 47J Ranger; Bell 201; Bell 204/205; Bell 206; Bell 207 Sioux Scout; Bell 212; Bell 214; Bell 214ST; Bell 222/230; Bell 309 KingCobra; Bell 360 Invictus; Bell 400 TwinRanger; Bell 407; Bell 412; Bell 427; Bell 429 GlobalRanger; Bell 430; Bell 505 Jet Ranger X; Bell 525 Relentless; Bell 533; Bell AH-1 Cobra; Bell AH-1 SuperCobra; Bell AH-1Z ...
The Bell 412 is a utility helicopter of the Huey family manufactured by Bell Helicopter. It is a development of the Bell 212, with the major difference being the composite four-blade main rotor. It is a twin-turbine helicopter that has been popular on the civilian and military markets, and major users include Canada, Italy, and Japan.
The more powerful Bell 222B was introduced in 1982 with a larger diameter main rotor. The 222B-based Bell 222UT Utility Twin, with skid landing gear, was introduced in 1983. [1] A development of the 222 is the Bell 230, with the 222's LTS 101 engines replaced by two Allison 250 turboshaft engines, plus other refinements. A converted 222 first ...
The tail rotor's position and distance from the center of gravity allow it to develop thrust in a direction opposite that of the main rotor's rotation, thereby countering the torque effect created by the main rotor. Tail rotors are simpler than main rotors since they require only collective changes in pitch to vary thrust.