Boeing 787 specifications

There will initially be three different variations of the 787.

They are:

B 787 – 3 Range 2,500 to 3,050 nautical miles (4,600 to 5,650 kilometres), accommodating 290 - 330 passengers.(initially ordered by All Nippon Airways for single class domestic routes.)

B 787 - 8 Range 7,650 to 8,200 nautical miles (14,200 to 15,200 kilometres), accommodating 210 - 250 passengers.

B 787 – 9 Range 8,000 to 8,500 nautical miles (14,800 to 15,750 kilometres), accommodating 250 - 290 passengers.

As well as bringing large jet ranges to a medium sized jet, the 787 will also match the speeds of larger jets, being a cruise of Mach 0.85. This will be delivered with an environmentally friendly fuel saving in the area of 20%.

Key to delivering this efficiency is a suite of new technologies

Weight is being reduced by the fact that up to 50% of the aircraft is built using composite materials, including the fuselage and wings. To put this in perspective, compare Boeings current Aircraft the 777.

Boeing 787
Composite Materials	50 Per Cent
Aluminium	20 Per Cent
Other Materials	30 Per Cent
Boeing 777
Composite Materials	12 Per Cent
Aluminium	50 Per Cent
Material Breakout of Boeing 787
Composite Materials	50 Per Cent
Aluminium	20 Per Cent
Titanium	15 Per Cent
Steel	10 Per Cent
Other	5 Per Cent

The fuselage is constructed using a single piece barrels joined end to end instead of multiple panels. This reduces the need for around 40,000—50,000 fasteners. Additionally it increased strength allowing for higher cabin pressures.

787 will carry self monitoring systems that will be able to report to ground based computer systems on the state of health of the aircraft and it’s systems.

One third of the efficiencies will come from the new technology engines. Boeing has chosen two engines to launch with; the General Electric GEnx and Rolls-Royce Trent 1000. 

Both engines will move from the old ‘bleed air systems of powering aircraft systems such as; air conditioning and start-up to electrical, thus moving to more electrical aircraft. This is weight saving as well as less power drain on the engines. 

Both engine types will have an identical interface allowing operators to fit either type of engine when required. The engine nacelles will also feature chevroned trailing edges of the casing to reduce engine noise. 

For the first time Pratt and Whitney have not had a launch product, as it is believed they could not make the business case work to develop this kind of engine. 

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 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.

A special toilet has been designed to accommodate wheelchair passengers, a 56 inch by 57 inch lavatory has a moveable wall so that two lavatories can be converted to one to allow access.

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