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Bell 214 Huey Plus - The prototype 214 flew in 1970. Powered by one Lycoming T53-L-702 turboshaft (1,900 shp/1,415 kW). [3] Bell 214A/C Isfahan - The 299 Bell 214As for the Imperial Iranian Army Aviation were built beginning in 1972, followed by 39 Bell 214Cs with a hoist (winch) and other search and rescue equipment for the Imperial Iranian ...
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 HueyTug, was a commercial version of the UH-1C with an upgraded transmission, longer main rotor, larger tailboom, strengthened fuselage, stability augmentation system, and a 2,650 shp (1,976 kW) Lycoming T-55-L-7 turboshaft engine. [12] Bell 212 15 seat twin-engined derivative of the Bell 205 Bell 214 Huey Plus Strengthened development of ...
Bell 412CF looking forward from the tail Bell 412 on approach. Development began in the late 1970s, with two Bell 212s being converted into 412 prototypes. An advanced four-blade main rotor with a smaller diameter replaced the 212's two-blade rotor. A Bell 412 prototype first flew in August 1979.
With a single main rotor helicopter, the creation of torque as the engine turns the rotor creates a torque effect that causes the body of the helicopter to turn in the opposite direction of the rotor. To eliminate this effect, some sort of antitorque control must be used with a sufficient margin of power available to allow the helicopter to ...
Bell and AW cooperated also on the AW609 tiltrotor. [6] Bell planned to reduce employment by 760 in 2014 as fewer V-22s were made. [6] A rapid prototyping center called XworX assists Bell's other divisions in reducing development time. [7] The company was rebranded as "Bell" on February 22, 2018. [8]
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Civil designation for the T55-L-7 military engine; dry weight of 580 lb (260 kg) [5] also powered the original Bell 214 helicopter as a 2,930 shp (2,180 kW) engine in 1970 [6] LTC4B-8D 2,950 shp (2,200 kW) engine powering the Bell 214 A helicopter; [ 7 ] uprated from the T55-L-7C; 433 engines produced between 1973 and 1977 for this military ...