Boeing 777-200 General |
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| Long range widebody aircraft |
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Boeing 777-200 Program Milestones |
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| First Flight - RR Trent 800 |
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Boeing 777-200 Dimensions |
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| 199 feet 11 inch (60,9 m) |
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| 70 feet 7,5 inch (21,53 m) |
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Boeing 777-200 Range |
| 5,210 nautical miles (9,649 km) |
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Boeing 777-200 Powerplants |
| Pratt & Whitney PW 4073/4073A |
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| Rolls
Royce Trent 870/871 |
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| General
Electric GE 90-B3/-B4 |
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| General Electric GE 90-B5 |
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| General Electric GE 90-B1 |
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| General Electric GE 90-B4 |
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Prices all variants - ($ in Millions) |
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| Boeing 777-200 - "Start of the digital era..." |
The Boeing 777 family is a complete family of jetliners of which the 777-200 was the first to enter commercial service. In total, the market-leading 777 family consists of six airplanes: five passenger models and a freighter model. All aircraft are capable of flying non-stop poin-to-point services between the world's busiest hub airports. In every aspect the Boeing 777 is a technological wonder while being able to respond to market needs and customer preferences. With the introduction of the first 777, the 777-200, in 1995, a trend was set for a family of fuel-efficient, long-range aircraft featuring high safety standards and reliability.
The Boeing 777-200 is a state-of-the-art twin-engine airplane specifically designed for medium to long range flights. In fact is the largest twin engined aircraft in the world powered by some of the most powerful and advanced high bypass ratio engines today. Unique characteristics to the Boeing 777, or triple-seven, include a two crew cockpit with a digitalized cockpit, circular cross-section, six-wheel main landing gears and a fly-by-wire flight control system.
Another interesting fact is that the aicraft is the first airliner ever to be 100 percent digitally designed using three-dimensional computer graphics. Using this method eliminated the need for costly mock-ups and test equipment. The Boeing 777 program was launched in October 1990 with an order from United Airlines. Almost 5 years later, United Airlines flew its first revenue service. After its first appearance in 1995, the Boeing 777 has been a favorite aircraft to many aviation enthousiasts. Not only does it have unmatched performance, the exterior looks are rather interesting. With engines as big as the Boeing 737 fuselage and triple boogie landing gears the aircraft is an impressive sight.
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| Boeing 777-200 Design |
Besides being very fuel-efficient, the Boeing 777 distinguishes itself by its two enormous size turbofan engines. Three engine manufacturers developed various models to power the airplane with fuel efficiency and low noise emissions as most important design factors. The aircraft can be either powered by the PW4000 series, developed by Pratt & Whitney, the GE90 Series, developed by General Electric, or the Trent 800 series, designed by Rolls Royce. Key factors in this performance are new, larger-diameter fans with wide-chord fan blade designs and bypass ratios ranging from six-to-one to as high as nine-to-one. Differences are obvious when compared to typical five-to-one ratios for the engines of previous twin-aisle jets.
| The flight deck of the Boeing 777 is somewhat similar to that of the Boeing 747-400. Flight, navigation and engine information is presented on six large display screens, incorporating advanced LCD (Liquid Cristal Display) technology. This new technology weighs less and requires less power while generating less heat, which contributes to greater reliability and longer service life compared to the conventional CRT (Cathode Ray Tube) screens. Control Display Units (CDUs), installed in the center aisle stand, provide data entry and display capabilities for flight management functions. Compared to older generation FMC systems, the Boeing 777 incorporates CDUs with color displays which allow pilots to assimilate the information more quickly. |
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As already pointed out earlier, the Boeing 777 is equipped with fly-by-wire technology. This means that the flight crew transmits control and maneuvering commands through electrical wires, augmented by computers, directly to hydraulic actuators for the elevators, ailerons, rudder and other control surfaces. Fly-by-wire technology already proved to be highly efficient and reliable on many fighter aircraft as well as on Airbus aircraft. The lack of mechanical linkages saves weight and simplifies factory assembly while requiring less costly maintenance hours.
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A key part of the systems incorporated in the Boeing 777 design, is a two-way digital data bus, known as ARINC 629. The system allows airplane systems, including associated computers, to communicate with one another through a common wire path instead of through one-way wire connections. This system also simplifies assembly and saves weight, while increasing reliability through a reduction in the amount of wires and connectors. There are a total of 11 of these ARINC 629 pathways in the Boeing 777. The Boeing 777 was the first aircraft ever to be equipped with the Enhanced Ground Proximity Warning System (EGPWS) as standard. The EGPWS equipment displays potentially threatening terrain and gives an audible alert up to a minute in advance of possible terrain conflict.
Although the main landing gear of the 777 is in a standard two-post arrangement, it features six-wheel trucks, instead of the conventional four-wheel units. It provides the aircraft with a total of 12 wheels for better weight distribution on runways and taxiway areas, while avoiding the need for a supplemental two-wheel gear under the center of the fuselage, like the MD-11 has. Nice detail is that the 777's landing gear is the largest ever incorporated into a commercial airplane.
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| Boeing 777 Versions |
Boeing 777-200 |
The Boeing 777-200 is the base-line model of the 777. The first aircraft was delivered to United Airlines in May 1995. The aircraft was build by Boeing's non-destructive testing campaign in 94' - 95', and provided valuable knowledge for the later 777 programs. |
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Boeing 777-200ER |
The Boeing 777-200ER was taken into service in 1997, roughly two years after the first 777 was delivered to United Airlines. It featured increased fuel capacity as well as more powerful engines. ER stands for Extended Range as the -200ER is able to fly significantly farther than the -200. The first airframe was delivered to British Airways. |
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Boeing 777-200LR |
The Boeing 777-200LR (Longer Range) entered service in 2006 and became the world's longest range commercial airliner. The -200LR, also known as Worldliner, is able to connect almost any two citypairs in the world. It is capable of flying 9.450 nautical miles within a time span of 18 hours. The first airframe was delivered to launch customer Pakistan International Airlines (PIA) on February 26, 2006. |
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Boeing 777-300 |
The Boeing 777-300 was originally designed as a replacement for the 747-100 and -200 aircraft. It features a 33 feet fuselage stretch over the baseline 777-200 and allows for up to 550 passengers in a single class cabin configuration. The first aircraft was put into service by Cathay Pacific in June, 1998. |
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Boeing 777-300ER |
The Boeing 777-300ER (Extended Range) is the longer range version of the Boeing 777-300. It contains many modifications, including the most powerful engines ever produced, the GE90-115B. The aircraft is also equipped with raked wingtips, additional fuel tanks, strengthened main landing gear and fuselage and a higher Maximum Take-off Weight (MTOW). The first aircraft was delivered to Air France on April 29, 2004 |
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