Boeing 777

The Boeing 777 is a long-range, wide-body twin-engine jet airliner manufactured by Boeing Commercial Airplanes. It is the world's largest twinjet and is commonly referred to as the "Triple Seven". The aircraft has seating for over 300 passengers and has a range from 5,235 to 9,380 nautical miles (9,695 to 17,370 km), depending on model. Its distinguishing features include the largest-diameter turbofan engines of any aircraft, six wheels on each main landing gear, a circular fuselage cross-section, and blade-shaped tail cone.Developed in consultation with eight major airlines, the 777 was designed to replace older wide-body airliners and bridge the capacity difference between the 767 and 747. As Boeing's first fly-by-wire airliner, it has computer mediated controls; it is also the first entirely computer-designed commercial aircraft.

The 777 is produced in two fuselage lengths. The original 777-200 model first entered service in 1995, followed by the extended-range 777-200ER in 1997; the stretched 777-300, which is 33.3 ft (10.1 m) longer, began service in 1998. The longer-range 777-300ER and 777-200LR variants entered service in 2004 and 2006, respectively, while a freighter version, the 777F, debuted in 2009. Both longer-range versions and the freighter feature General Electric GE90 engines, as well as extended and raked wingtips. Other models are equipped with either the GE90, Pratt & Whitney PW4000, or Rolls-Royce Trent 800 engines. The 777-200LR is the world's longest-range airliner and holds the record for longest distance flown by a non-stop commercial aircraft,with the demonstrated capability to fly more than halfway around the world.

United Airlines first placed the 777 into commercial airline service in 1995. As of July 2011, 60 customers have placed orders for 1,242 aircraft of all variants, with 949 delivered. The most common variant used worldwide is the 777-200ER, with 415 aircraft delivered, and Emirates operates the largest 777 fleet, with 87 aircraft as of August 2011. The airliner has recorded two hull-loss accidents, with no occupant fatalities, as of December 2011.

Through the 2000s, the 777 has emerged as one of its manufacturer's best-selling models. Because of rising fuel costs, airlines have acquired the type as a comparatively fuel-efficient alternative to other wide-body jets and have increasingly used the aircraft on long-haul, transoceanic routes. Direct market competitors include the Airbus A330-300, A340, and the upcoming A350. The subsequently developed 787 Dreamliner also shares design features with the 777.




Powerplants
777-200 - Two 329kN (74,000lb) Pratt & Whitney PW4074 turbofans, or 334kN (75,000lb) General Electric GE90-75Bs, or 334kN (75,000lb) Rolls-Royce Trent 875s.
247 tonne MTOW version - Two 345kN (77,000lb) PW4077s, or 338kN (76,000lb) GE90-76Bs or 345kN (77,000lb) Trent 877s.
777-200ER - Two 374kN (84,000lb) PW4084s, or 378kN (85,000lb) GE90-85Bs, or 373kN (84,000lb) Trent 884s; or 400kN (90,000lb) class PW4090s, GE90-90B1s, or Trent 890s; or 409kN (92,000lb) GE90-92Bs.
777-200LR - Two 489kN (110,000lb) GE90-110B1s.

Performance
Typical cruising speed 905km/h (490kt).
777-200 - Range 229 tonne MTOW 7000km (3780nm), 233 tonne MTOW 7778km (4200nm), 247 tonne MTOW range 9537km (5150nm).
777-200ER - 263 tonne MTOW range 11,037km (5960nm), 286 tonne MTOW range 14,316km (7730nm).
777-200LR - Max range 16,417km (8865nm)

Weights
777-200 - Empty 139,025kg (306,500lb) or 139,160kg (306,800lb), max takeoff optionally 229,520kg (506,000lb), or 233,600kg (515,000lb), or 247,210kg (535,000lb).
777-200ER - Empty 142,430kg (314,000lb) with 374kN/84,000lb engines, 143,015kg (315,300lb) with 400kN/90,000lb engines, max takeoff optionally 263,085kg (580,000lb) or 286,897kg (632,500lb).
777-200LR - Max takeoff 341,105kg (752,000lb).

Dimensions
777-200 - Wing span 60.93m (199ft 11in), or folded 47.32m (155ft 3in), length 63.73m (209ft 1in), height 18.51m (60ft 9in). Wing area 427.8m2 (4605sq ft).

Capacity
Flightcrew of two. Passenger seating for 305 in three classes or up to 440. Underfloor capacity for up to 32 LD3 containers.

Production
Total 777-200 orders received as of early 2003 452, with 379 delivered.