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Bell 427

By Wikipedia,
the free encyclopedia,

http://en.wikipedia.org/wiki/Bell_427

Bell 427
Croatian Bell-427 landing
Role Multipurpose utility helicopter
National origin United States/Canada
Manufacturer Bell Helicopter Textron
First flight 11 December 1997
Introduced 2000
Status Active service
Developed from Bell 407
Variants Bell 429

The Bell Model 427 is a twin-engine civil utility helicopter, a new design derived from on the Bell 407. It is scheduled to be replaced by the stretched Bell 429.

Development

Bell has tried several incarnations of a twin version of its successful Bell 206 series, including the stillborn Bell 400 and 440 of the mid 1980s, and the limited production Bell 206LT TwinRanger of the early 1990s.

Bell's original concept for a replacement for the 206LT TwinRanger was the Bell 407T, a relatively straightforward twin engine development of the Bell 407 with two Allison 250-C22B engines. However, Bell concluded that the payload/range performance of the 407T would not be sufficient, and so began development of a new light twin, in partnership with South Korea's Samsung Aerospace Industries. In February 1996, Bell announced the Model 427 at the Heli Expo in Dallas.

The Bell 427 first flew on December 11, 1997. Canadian certification was awarded on November 19, 1999, followed by US certification in January 2000, and US FAA dual pilot IFR certification in May 2000. The first customer deliveries occurred in January 2000.

Bell had planned to re-design the 427, offering it in 2004 as the Bell 427i, but later cancelled the program and focused on the improved Bell 429. In February 2005, the existing 80 orders for 427is were converted to the 429.

On 24 January 2008, Bell announced plans to officially discontinue its 427 line after current order commitments are fulfilled in 2010.

Design


Bell-427 cockpit.
Bell-427 cockpit.

The Bell 427 was the company's first aircraft designed entirely on computer. Bell builds the 427's flight dynamics systems at Fort Worth, Texas, while final assembly is performed at Bell's Mirabel, Quebec facility. The 427's fuselage and tailboom are built by Samsung at its Sachon plant in South Korea.

Power is supplied by two Pratt & Whitney Canada PW207D turboshafts with FADEC. Like the Bell 407, the 427 uses a 4-bladed rotor system with a rigid, composite rotor hub instead of the 2-bladed semirigid rotor of the Model 206.

The Bell 427's cabin is 33 cm (13 in) longer than the 407, and is largely of composite construction. The cabin lacks the roof beam which obstructs the cabin on the 206/206L/407, and has an optional sliding main cabin door. The 427's systems are nearly identical to the 407.

The 427 offers 8-place seating including pilot in a 2+3+3 arrangement. Alternate layouts include four in the main cabin in a club configuration, or two stretchers and two medical attendants for medevac duties.

Operators

Specifications (Bell 427)

Data from International Directory of Civil Aircraft

General characteristics

  • Crew: 1 pilot
  • Capacity: 7 passengers
  • Length: 35 ft 11 in (10.94 m)
  • Rotor diameter: 37 ft 0 in (11.28 m)
  • Height: 11 ft 5 in (3.49 m)
  • Disc area: 1,075.2 ft² (99.9 m²)
  • Empty weight: 3,842 lb (1,743kg)
  • Loaded weight: lb (kg)
  • Useful load: lb (kg)
  • Max takeoff weight: 6,350lb (2,880 kg)
  • Powerplant:Pratt & Whitney Canada PW207D turboshaft, 710 hp (529 kW) each

Performance

See also

Related development

Comparable aircraft

External links




Text from Wikipedia is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply.


Published - July 2009














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