Bell Helicopters

The Bell 412 is a twin-engine utility helicopter of the Huey family manufactured by Bell Helicopter.


 Bell 412SP Four Twelve

Design and development

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. The initial model was certified in January 1981 with deliveries commencing in the same month.


The 412 model was followed by the 412SP (Special Performance) version featuring larger fuel capacity, higher takeoff weight and optional seating arrangements. In 1991, the 412HP (High Performance) variant with improved transmission replaced the SP version in production. The current production version, 412EP (Enhanced Performance), is equipped with a dual digital automatic flight control system. In 2013 Bell introduced the 412EPI which includes an electronic engine control (FADEC) for a PT6T-9 engine upgrade, and a glass cockpit display system similar to the Bell model 429. Also featured is a Garmin touchscreen navigation system, and the BLR Strake and Fast Fin upgrades for improved hover performance.

Over 700 Model 412s (including 260 by AgustaWestland) have been built

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Bell Griffin HT1

Advanced training helicopter based on the Bell 412EP, operated by the Royal Air Force (RAF) since 1997 as an advanced flying trainer. Operated by the Defence Helicopter Flying School at RAF Shawbury and the Search and Rescue Training Unit at RAF Valley.





Bell Helicopters
Bell 412SP Griffon

Bell 412

Standard Model with P&WC PT6T-3B

Bell 412SP

Special Performance version with P&WC PT6T-3BF engines

Bell 412EP

Enhanced performance version with P&WC PT6T-3DF engines

Bell 412EPI

Glass cockpit version with P&WC PT6T-9 electronic controlled engines

Bell 412SP Griffon: Specifications

  • History

    Role Multipurpose utility helicopter

    National origin United States/Canada

    Manufacturer Bell Helicopter

    Introduction 1981

    Status In service


  • Users

    Primary users Royal Air Force

    See Operators for others

    Produced 1979-present

    Number built Over 869

    Developed from Bell 212

    Variants Bell CH-146 Griffon


  • General Info

    Crew: one-two pilots

    Capacity: up to 13 passengers, maximum external load of almost 6,614 lb (3,000 kg)

    Length: 56 ft 1 in (17.1 m)  Height: 15 ft (4.6 m)

    Empty weight: 6,789 lb (3,079 kg) Max. takeoff weight: 11,900 lb (5,397 kg)

    Fuselage length: 43 ft (13.1 m)

    Powerplant: 1 × Pratt & Whitney Canada PT6T-3D or PT6T-3DF Twin-Pac turboshafts, 1,250 shp Performance

    Maximum speed: 140 knots (161 mph, 259 km/h)

    Cruise speed: 122 knots (140 mph, 226 km/h)

    Range: 609 mi (up to 980km)0 ft/min (6.86 m/s)

Bell 412SP Griffon


The Bell 412 is a twin-engine 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.


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