Bell 412 (Special Performance SP) Pakistan Forces

[AZADPAKISTAN2009]

Development began in the late 1970s with two Bell 212 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 the 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.

General characteristics

• Crew: 1-2 pilots
• Capacity: up to 13 passengers, maximum external load of 4,500 lb (2,040 kg)
• Length: 56 ft 1 in (17.1 m)
• Rotor diameter: 46 ft (14.0 m)
• Height: 15 ft (4.6 m)
• Disc area: 1,662 ft² (154.4 m²)
• Empty weight: 6,789 lb (3,079 kg)
• Max. takeoff weight: 11,900 lb (5,397 kg)
• Powerplant: 2 × Pratt & Whitney Canada PT6T-3BE Twin-Pac turboshafts, 900 shp (671 kW) each
• Fuselage length: 43 ft (13.1 m)

Performance

• Maximum speed: 140 knots (161 mph, 259 km/h)
• Cruise speed: 122 knots (140 mph, 226 km/h)
• Range: 402 nmi (463 mi, 745 km)
• Service ceiling: 20,000 ft (6,096 m)
• Rate of climb: 1,350 ft/min (6.86 m/s)
• Power/mass: 0.2663 hp/lb (437 W/kg)

 

[Abingdonboy]

So what are these SPs used for? Supporting SFs?

 

[Tehmasib]

how many we have these birds...any idea???

 

[fatman17]

why start a new thread when this can be part of the army aviation sticky thread?

 

[AZADPAKISTAN2009]

I was interested in learning more about the Helos in service lately . the aviation corp thread is great however there is too much data in 1 area

The Bell Huey & other birds deserve a thread where their contributions can be highlighted.