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 has a capacity of over 300 passengers, with a range of 5,235 to 9,380 nautical miles (9,695 to 17,370 km), depending on model. Commonly referred to as the "Triple Seven", 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 a 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, entered 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 and extended raked wingtips. Other models are equipped with GE90, Pratt & Whitney PW4000 or Rolls-Royce Trent 800 engines. The 777-200LR is the world's longest-range airliner and can fly more than halfway around the globe; it holds the record for the longest distance flown non-stop by a commercial aircraft.

United Airlines first placed the 777 into commercial airline service in 1995. As of June 2012, 60 customers had placed orders for 1,372 aircraft of all variants, with 1,025 delivered.  As of July 2011, the most common variant used worldwide is the 777-200ER, with 428 in service, and Emirates operates the largest 777 fleet, with 87 aircraft. The airliner has been involved in two hull-loss accidents, with no on-board fatalities, as of August 2012.

The 777 ranks as one of Boeing'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 deployed the aircraft on long-haul transoceanic routes. Direct market competitors have included the Airbus A330-300, A340, McDonnell Douglas MD-11 and the forthcoming A350. The 787 Dreamliner, which entered service in 2011, shares design features with the 777.

Specifications

Plane	777-200	777-200ER	777-200LR	777 Freighter	777-300	777-300ER
Cockpit crew	Two
Seating capacity, typical	314 (3-class) 400 (2-class) 440 (maximum)			N/A (cargo)	386 (3-class) 451 (2-class) 550 (maximum)
Length	209 ft 1 in (63.7 m)				242 ft 4 in (73.9 m)
Wingspan	199 ft 11 in (60.9 m)		212 ft 7 in (64.8 m)		199 ft 11 in (60.9 m)	212 ft 7 in (64.8 m)
Wing sweepback	31.64°
Tail height	60 ft 9 in (18.5 m)		61 ft 1 in (18.6 m)		60 ft 8 in (18.5 m)
Cabin width	19 ft 3 in (5.87 m)
Fuselage width	20 ft 4 in (6.20 m)
Maximum cargo capacity	5,720 cu ft (162 m3) 32× LD3			23,051 cu ft (653 m3) 37× pallets	7,640 cu ft (216 m3) 44× LD3
Empty weight, operating	297,300 lb (134,800 kg)	304,500 lb (138,100 kg)	320,000 lb (145,150 kg)	318,300 lb (144,400 kg)	353,800 lb (160,500 kg)	370,000 lb (167,800 kg)
Maximum landing weight	445,000 lb (201,840 kg)	470,000 lb (213,180 kg)	492,000 lb (223,168 kg)	575,000 lb (260,816 kg)	524,000 lb (237,680 kg)	554,000 lb (251,290 kg)
Maximum Takeoff Weight (MTOW)	545,000 lb (247,200 kg)	656,000 lb (297,550 kg)	766,000 lb (347,500 kg)	766,800 lb (347,800 kg)	660,000 lb (299,370 kg)	775,000 lb (351,500 kg)
Typical cruise speed	Mach 0.84 (560 mph, 905 km/h, 490 knots) at a cruise altitude of 35,000 ft (11,000 m)
Maximum cruise speed	Mach 0.89 (590 mph, 950 km/h, 512 knots) at a cruise altitude of 35,000 ft (11,000 m)
Maximum range (Max passengers + baggage or max payload)	5,240 nmi (9,700 km)	7,725 nmi (14,310 km)	9,380 nmi (17,370 km)	4,900 nmi (9,070 km)	6,005 nmi (11,120 km)	7,930 nmi (14,690 km)
Takeoff distance at MTOW ISA+15 MSL	8,300 ft 2,530 m	11,700 ft 3,570 m	9,750 ft 2,970 m	9,800 ft 2,990 m	11,100 ft 3,380 m	10,500 ft 3,200 m
Maximum fuel capacity	31,000 US gal (117,348 L)	45,220 US gal (171,176 L)	47,890 US gal (181,283 L)		45,220 US gal (171,176 L)	47,890 US gal (181,283 L)
Service ceiling	43,100 ft (13,140 m)
Engine (×2)	PW 4077 RR 877 GE90-77B	PW 4090 RR 895 GE90-94B	GE90-110B1 GE90-115B1		PW 4098 RR 892 GE90-92B/-94B	GE90-115B1
Thrust (×2)	PW: 77,000 lbf (342 kN) RR: 76,000 lbf (338 kN) GE: 77,000 lbf (342 kN)	PW: 90,000 lbf (400 kN) RR: 93,400 lbf (415 kN) GE: 93,700 lbf (417 kN)	GE −110B: 110,100 lbf (490 kN) GE −115B: 115,300 lbf (512 kN)		PW: 98,000 lbf (436 kN) RR: 93,400 lbf (415 kN) GE: 92,000/93,700 lbf (409 kN/418 kN)	GE: 115,540 lbf (514 kN)

Source: Wikipedia