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Boeing 787 Dreamliner

The Boeing 787 Dreamliner is a mid-sized, twin engine jet airliner, being developed by Boeing Commercial Airplanes. Although not as big and luxurious as the Airbus A380, the Dreamliner is very fuel-efficient. It is the first major airliner to use composite materials for most of its construction, and it is also innovative in collaborate management approach with suppliers.

The Dreamliner's original development designation was 7E7, but was changed to 787 on January 28th, 2008.


1. Features

The 787 features lighter-weight construction. Its materials (by weight) are: 50% composite, 20% aluminum, 15% titanium, 10% steel, 5% other. Composite materials are significantly lighter and stronger than traditional aircraft materials, making the 787 a very light aircraft for its capabilities. By volume, the 787 will be 80% composite. Each 787 contains approximately 35 tonnes of carbon fiber reinforced plastic, made with 23 tonnes of carbon fiber. Composites are used on fuselage, wings, tail, doors, and interior. Aluminum is used on wing and tail leading edges, titanium used mainly on engines with steel used in various places.

The longest-range 787 variant can fly 8,000 to 8,500 nautical miles (14,800 to 15,700 km), enough to cover the Los Angeles to Bangkok or New York City to Taipei routes. It will have a cruise speed of Mach 0.85 (561 mph, 903 km/h at typical cruise altitudes).

he 787 will seat 240 in two-class domestic configuration, with a 46-in (116.8 cm) pitch for first class and a 34-in (86.4 cm) pitch for coach class. 296 passengers can be seated in a high-density 3+2+3 coach arrangement with 36-in (91.4 cm) Business and 32-in (81.3 cm) Coach pitch. Up to 234 passengers may be seated in a three-class setup that uses 61-in (154.9 cm) pitch in First Class (2+2+2 or 1+2+1), 39-in (99 cm) pitch for Business (2+3+2 or 2+2+2) and 32-in (81.3 cm) for Coach (2+4+2). Cabin interior width is approximately 18 feet (547 cm) at armrest, and was increased by 1 inch (2.5 cm) over what was originally planned. The 787's interior cabin width is a full 15 in (38 cm) greater than that of the Airbus A330 and A340, but 5 in (13 cm) narrower than the proposed A350-800 XWB. For economy class in 2+4+2 or 3+2+3 arrangements, seat-bottom widths will be 18.5 in (47 cm), comparable to that found on the Boeing 777. For 3+3+3 seating, the seat widths would be approximately 17.2 in (43.7 cm), the same as those found on the Boeing 737. The vast majority of airlines are expected to select the 3+3+3 configuration on the 787.

The cabin windows are larger than others currently on in-service civil air transport (27 cm by 47 cm), with a higher eye level, so passengers can see the horizon, with electrochromism-based "auto-dimming" (smart glass) to reduce cabin glare and maintain transparency. These are to be supplied by PPG. Light-emitting diode (LED) cabin lighting (three color) will be used instead of fluorescent tubes, allowing the aircraft to be entirely 'bulbless' and have 128 color combinations.

A version of Ethernet—Avionics Full-Duplex Switched Ethernet (AFDX) / ARINC 664—will be used to transmit data between the flight deck and aircraft systems. The flight deck features LCD multi-function displays, all of which will use an industry standard GUI widget toolkit (Cockpit Display System Interfaces to User Systems / ARINC 661). The Lockheed Martin Orio spacecraft will use a glass cockpit derived from Rockwell Collins' 787 flight deck. Like other Boeing airliners, the 787 will use a yoke instead of a side-stick.

The internal pressure will be increased to the equivalent of 6000 feet (1800 m) altitude instead of the 8000 feet (2400 m) on conventional aircraft. According to Boeing, in a joint study with Oklahoma State University, this will significantly improve passenger comfort. Higher humidity in the passenger cabin is possible because of the use of composites (which do not corrode). Cabin air is provided by electrically driven compressors using no engine bleed air. An advanced cabin air-conditioning system provides better air quality: Ozone is removed from outside air; HEPA filters remove bacteria, viruses and fungi; and a gaseous filtration system removes odors, irritants and gaseous contaminants.

Bleedless turbofans imply the elimination of superheated air conduits normally used for de-icing, aircraft power, and other functions. These systems are to be replaced by an all-electrical system. Another new system is a wing ice protection system provided by Ultra Electronics Controls Division of the UK that uses electro-thermal heater mats attached to the aircraft slats, special electrical harnesses for transferring the electrical power to the heater mats as well as system control and power switching technology.

An Active Gust Alleviation system, similar to the system that Boeing built for the B-2 bomber, improves ride quality. Boeing, as part of its "Quiet Technology Demonstrator 2" project, is experimenting with several engine noise-reducing technologies for the 787. Among these are a redesigned air inlet containing sound-absorbing materials and redesigned exhaust duct covers whose rims are tipped in a toothed pattern to allow for quieter mixing of exhaust and outside air. Boeing expects these developments to make the 787 significantly quieter both inside and out.

Boeing engineers designed the 787 interior to better accommodate persons with mobility, sensory, and cognitive disabilities. For example, a 56-inch by 57-inch convertible lavatory includes a movable center wall that allows two separate lavatories to become one large, wheelchair-accessible facility.



Flight crewTwo
Length186 ft (57 m)206 ft (63 m)
Wingspan170 ft (52 m)197 ft (60 m)208 ft (63 m)
Wing sweepback32.2°
Height55 ft 6 in (16.92 m)
Fuselage height19 ft 5 in (5.91 m)
Fuselage width18 ft 11 in (5.75 m)
Cabin width18 ft (5.49 m)
Cargo capacity4,400 ft³ (124.6 m³) 28 LD35,400 ft³ (152.9 m³) 36 LD3
Empty weight223,000 lb (101,151.1 kg)242,000 lb (109,769.4 kg)254,000 lb (115,212.5 kg)
Maximum takeoff weight364,000 lb (165,107.6 kg)484,000 lb (219,538.7 kg)540,000 lb (244,939.9 kg)
Cruise speedMach 0.85 (903 km/h, 561 mph, 487 knots, at 40,000 ft/12.19 km)
Maximum cruise speedMach 0.89 (945 km/h, 587 mph, 510 knots, at 40,000 ft/12.19 km)
Range, fully loaded (not max payload)2,500 – 3,050 NM
(4,650 – 5,650 km)
7,650 – 8,200 NM
(14,200 – 15,200 km)
8,000 – 8,500 NM
(14,800 – 15,750 km)
Maximum fuel capacity33,528 US gal (126,917 L)36,693 US gal (138,898 L)
Service ceiling43,000 ft (13.1 km)
Engines (2×)General Electric GEnx or Rolls-Royce Trent 1000
Maximum thrust capability53,000 lbf (235.8 kN)64,000 lbf (284.7 kN)70,000 lbf (311.4 kN)

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