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Information about Boeing 777
The Boeing 777, a long-range wide-body aircraft, is one of the largest twin-engine airliners in the world. The company Boeing considers this aircraft the most consumer-oriented in the world, since airlines and passengers took part in its creation.
Boeing 777 Development
Initially, Boeing planned to build on the 767 and rework it, which resulted in the concept of the so-called 767-X. He was in many ways reminiscent of the 767, but had an elongated fuselage, an increased wing area and could carry about 340 passengers over a distance of up to 13.5 thousand kilometers.
However, the airlines were unhappy. They wanted a plane capable of flying not only for intercontinental, but also for shorter distances, with a cabin configuration similar to the Boeing 747, which could also be changed by adding or removing the required number of seats in the cabin of a particular class. Another prerequisite was to reduce operating costs – they would have to be significantly lower than that of the Boeing 767. As a result, the initial project was significantly reworked.
In 1988, Boeing presented the twin-engine project Boeing 777. Airlines showed interest in it, and from December 1989, sales of the aircraft began.
The assembly of the first Boeing 777 began on January 4, 1993. By that time, 118 firm orders from 10 airlines arrived on the plane. The total investment in the program was more than $ 4 billion.
First flight and certification
April 9, 1994, the first Boeing 777 with serial number WA001 was rolled out of the hangar. Over 100,000 guests gathered to see the first copy.
On April 19, 1995, the aircraft was certified by the United States Federal Aviation Administration (FAA).
In project 777, Boeing introduced a number of cutting-edge technologies that include: a fully digital electroplating control system (fly-by-wire), fully programmable avionics, a glass cockpit (Glass Cockpit) with Honeywell liquid crystal displays, a fiber optic avionics network (which on the commercial plane was held for the first time). At the same time, Boeing used already known developments from the canceled project of the regional Boeing 7J7 aircraft, which had a similar level of technology.
The wing of the Boeing 777 has a supercritical profile optimized for a cruising speed of Mach 0.83 (after testing, the indicator was revised upwards to Mach 0.84). The wing design has a greater thickness and span than the previous aircraft, which made it possible to increase the range and payload, improve flight performance and increase the cruising altitude. When the project 777 was launched, it was proposed to develop a Folding wingtips so that airlines could use the hangars for small aircraft, but no airline agreed to this option.
The Boeing 777 also has the largest landing gear and the largest tires that have ever been used in commercial jet liners. Each tire from the main six-wheel 777-300ER landing gear can withstand a load of 27 tons, which is more than the load on the tire of the Boeing 747-400 aircraft.
The aircraft has three backup hydraulic systems, of which only one is needed for landing.
In the wing of the wing under the fuselage is an emergency aircraft turbine – a small propeller, which extends from the aircraft in emergency situations to ensure minimum power supply.
Boeing 777 – became the first aircraft in the history of the company, which is equipped with fly-by-wire electric remote control system. However, for the convenience of pilots, it was decided to leave the usual steering column. Along with the traditional control system with the help of steering wheels, the cabin has a simplified layout that preserves the similarity with previous models of Boeing.
The fly-by-wire control system is also equipped with protection of flight parameters, which ensures that pilots movements on the control levers do not go beyond the established limits of the flight configuration. Also, the system prevents dangerous maneuvers. However, in case of emergency, the system can be turned off at the command of the pilot, if deemed necessary.
The interior of the Boeing 777, is made in the style of the Boeing Signature Interior, it has increased luggage racks and indirect lighting. The configuration of the seats ranges from 4 in the first class to 10 in the economy class. The size of the windows – 380 × 250 mm – was the largest of all commercial airliners until the appearance of 787. The cabin layout allows airlines to quickly move seats, kitchens, and toilets, depending on the desired configuration. Some aircraft are equipped with VIP lounges for charter flights. Of the features, special attention should be paid to the development of Boeing engineers – a new hydraulic hinge of the toilet lid, which closes slowly.
On July 7, 2011, it was reported that Boeing decided to replace the Signature Interior in the model 777 with a new interior from 787, according to the program to unify all Boeing aircraft.
Boeing 777 modifications:
|3-class seats||305 (24F/54J+227Y)||368 (30F/84J/254Y)||365 (22F/70J/273Y)||301 (16F/58J/227Y)|
|Length||209 ft 1 in / 63.73 m||242 ft 4 in / 73.86 m||209 ft 1 in / 63.73 m|
|Wingspan||199 ft 11 in / 60.93 m, 31.6° Wing sweep||212 ft 7 in / 64.80 m, 31.6° Wing sweep|
|Wing area||4,605 sq ft (427.8 m2), 8.68 AR||4,702 sq ft (436.8 m2), 9.04 AR|
|Tail height||60 ft 9 in / 18.5 m||60 ft 8 in / 18.5 m||61 ft 1 in / 18.6 m|
|Fuselage width||20 ft 4 in / 6.20 m|
|Cabin width||231 in / 5.86 m, Seats: 18.5 in / 47 cm at 9 abreast, 17 in / 43 cm at 10 abreast|
|Cargo volume||5,330 ft³ / 150.9 m³||7,120 ft³ / 201.6 m³||5,330 ft³ / 150.9 m³|
|MTOW||545,000 lb / 247,200 kg
200ER: 656,000 lb / 297,550 kg
|660,000 lb / 299,370 kg||775,000 lb / 351,533 kg||766,000 lb / 347,452 kg
777F: 766,800 lb / 347,815 kg
|OEW||299,550 lb / 135,850 kg
200ER: 304,500 lb / 138,100 kg
|353,800 lb / 160,530 kg||370,000 lb / 167,829 kg||320,000 lb / 145,150 kg
777F: 318,300 lb / 144,379 kg
|Fuel capacity||31,000 US gal / 117,340 L / 207,700 lb / 94,240 kg
200ER/300: 45,220 US gal / 171,171 L / 302,270 lb / 137,460 kg
|47,890 US gal / 181,283 L / 320,863 lb / 145,538 kg|
|Ceiling||43,100 ft (13,100 m)|
|Speed||Max. Mach 0.87–Mach 0.89 (499–511 kn; 924–945 km/h), Cruise Mach 0.84 (482 kn; 892 km/h)|
|Range||5,240 nmi / 9,700 km
200ER: 7,065 nmi / 13,080 km
|6,030 nmi / 11,165 km||7,370 nmi / 13,649 km||8,555 nmi / 15,843 km
777F: 4,970 nmi / 9,200 km
|Takeoff||8,000 ft (2,440 m)
200ER:11,100 ft (3,380 m)
|10,600 ft (3,230 m)||10,000 ft (3,050 m)||9,200 ft (2,800 m)
777F: 9,300 ft (2,830 m)
|Turbofan||2× PW4000 / Trent 800 / GE90||2× GE90-110B1/115B|
|Max thrust||2× 77,200 lbf (343 kN)
200ER: 2× 93,700 lbf (417 kN)
|2× 98,000 lbf (440 kN)||2× 115,300 lbf (513 kN)|
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