Modern Airliners

Dreamliner Boeing 787 Specs

Boeing 787-10 rollout

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There are three different variations of the Boeing 787 Dreamliner and as of 31 March 2017, all three variants are flying commercially.  The Boeing 787-8, 787-9 and 787-10 are described in the Boeing 787 Specs table at the bottom of this page which shows the detailed specifications of each of the types.

As well as bringing large jet ranges to a medium-sized jet, the Boeing 787 also matches the speeds of larger jets with a cruise of Mach 0.85. This is delivered with an environmentally friendly fuel saving in the area of 20% over similar-sized older airliners.

Key to delivering this efficiency is a suite of new technologies.

Boeing 787 Composites

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 the Boeing 787 with Boeing’s top-selling Aircraft, the Boeing 777.

Boeing 787 Dreamliner
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
Other Materials 38 Per Cent

The fuselage is constructed using 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.

The Boeing 787 carries self-monitoring systems that are able to report to ground-based computer systems on the state of health of the aircraft and its systems.  One-third of the efficiencies come from the new technology engines. Boeing has chosen two engines to work with; the General Electric GEnx and Rolls-Royce Trent 1000.  Both engines move from the old Bleed Air systems of powering aircraft systems such as air conditioning and start-up, to electrical, thus moving to a more electrical aircraft. This is weight saving as well as less of a power drain on the engines.

Boeing 787 Dreamliner Materials Pictorial

A pictorial representation of the materials used to construct the Boeing 787 Dreamliner.

Both engine types have an identical interface allowing operators to fit either type of engine when required. The engine nacelles 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”, experimented with several engine noise-reducing technologies for the Boeing 787. Among these was a redesigned air inlet containing sound-absorbing materials and redesigned exhaust duct covers whose rims are tipped in a toothed pattern to allow for a quieter mixing of exhaust and outside air.  Boeing found these developments made the Boeing 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 movable wall so that two lavatories can be converted to one to allow access.

Boeing 787 Dreamliner wing comparison.
Boeing 787 Dreamliner cut away.

Dreamliner Boeing 787 Specs Table

Boeing 787 Dreamliner
Variant Boeing 787 8 Boeing 787 9 Boeing 787 10
 
Milestones      
  Maiden Flight 15 December 2009 17 September 2013 31 March 2017
  Launch Delivery 25 September 2011 10 July 2014 26 March 2018
  Launch Airline All Nippon Airways Air New Zealand Singapore Airlines
 Boeing 787 Price List (average) US$224.6 Million US$264.6 Million US$306.1 Million
Dimensions      
 Fuselage      
  Fuselage Length 56.7 Mtr (186 Ft) 62.8 Mtr (206 Ft) 68.3 Mtr (224 Ft)
  Fuselage Height
5.94 Meters (19 Feet 4 Inches)
  Fuselage Width (outside)
5.77 Meters (18 Feet, 11 Inches)
  Max. Cabin Width
5.49 Meters (18 Feet)
 Wings      
  Wing Span
60.1 Metres (197 Feet, 3 Inches)
  Wing Area
377 Square Metres (4,058 Square Feet)
Wing Sweep Back
32.2 Degrees
Tail Fin      
  Aircraft Height
16.9 Metres (55 Feet 6 Inches)
17.02 Metres (55 Feet 10 Inches)
Under Carriage      
Number of Nose Wheels
2
Number of Main Wheels
2 x Bogies of 4
Engines x two
General Electric GEnx-1B or Rolls-Royce Trent 1000
  Thrust 64,000 lbf (280 kN) 71,000 lbf (320 kN) 76,000 lbf (340 kN)
Cabin      
  Seating 242 (2 class) 280 (2 class) 330 (2 class)
  Seats Abreast
Typical 9 seats abreast in 3-3-3 configuration with seat width of 43.7cm(17.2in) at armrest level
Weights      
  Maximum Take Off Weight 227,930 kg (502,500 lb)
254,011 kg (560,000 lb)
  Maximum Landing Weight 172,000 kg (380,000 lb) 193,000 kg (425,000 lb) 202,000 kg (445,000 lb)
  Maximum Zero Fuel Weight 161,000 kg (355,000 lb) 181,000 kg (400,000 lb) 193,000 kg (425,000 lb)
  Operating Empty Weight
119,950 kg (264,500 lb) 128,850 kg (284,000 lb) 135,500 kg (298,700 lb)
Fuel Capacity Litres 126,206 Litres (33,340 US gal)
126,372 Litres (36,384 US gal)
Speeds      
  Vmo/Mmo Velocity/Mach Max Operating speed
Mach 0.90 (593 mph, 515 knots, 954 km/h at 35,000 ft/10,700 meters)
  Cruise Speed IAS/Mach
Mach 0.85 (567 mph, 488 knots, 903 km/h at 35,000 ft/10,700 m)
Ceiling
43,000 Feet (13,100 Metres)
Range 13,620 km (7,355 nmi)
14,140 km (7,635 nmi) 11,910 km (6,430 nmi)
Cargo Capacity 136.7 m3 (4,826 cu ft) 28 × LD3 or 9x (88×125) pallets.
172.5 m3 (6,090 cu ft) 36× LD3 or 11 x (96×125) pallets. 191.4 m3 (6,722 cu ft) 40× LD3 or 13x (96×125) pallets.
Take Off distance at MTOW at sea level (ISA) 2,600 m (8,500 ft) 2,800 m (9,300 ft) 2,800 m (9,100 ft)
Variant Boeing 787 8 Boeing 787 9 Boeing 787 10

If there is more you want to learn about this airliner, please visit: Boeing 787 Home, Boeing 787 Interior, Boeing 787 Assembly, Boeing 787 Order Book and Boeing 787 History.

For a deep dive into the Boeing 787–8 Design, Certification, and Manufacturing Systems Review, click here.

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