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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.
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 ...
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 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]
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.
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The UH-1H's dynamic components include the engine, transmission, rotor mast, main rotor blades, tail rotor driveshaft, and the 42-degree and 90-degree gearboxes of the tail rotor. The main rotor transmission consists of a 90 degree bevel gear assembly with a reduction ratio of 2.14:1, followed by a 2-stage planetary gearset with a ratio of 9.53 ...