page_title: Bristol Britannia
section_title: Specifications (Series 310)
hierarchical_section_title: Bristol Britannia / Specifications (Series 310)
caption_attribution_description: The cockpit of the Bristol Britannia 312 G-AOVT at the Imperial War Museum, Duxford, photographed by Robin Stevens on 26 May 2007.
context_page_description: The Bristol Type 175 Britannia was a British medium-to-long-range airliner built by the Bristol Aeroplane Company in 1952 to fly across the British Empire. During development two prototypes were lost and the turboprop engines proved susceptible to inlet icing, which delayed entry into service while solutions were sought.
  By the time development was completed, "pure" jet airliners from France, United Kingdom, and the United States were about to enter service, and consequently, only 85 Britannias were built before production ended in 1960. Nevertheless, the Britannia is considered one of the landmarks in turboprop-powered airliner design and was popular with passengers. It became known as "The Whispering Giant" for its quiet exterior noise and smooth flying, although the passenger interior remained less tranquil.
  Canadair purchased a licence to build the Britannia in Canada, adding another 72 variants. These were the stretched Canadair CL-44/Canadair CC-106 Yukon, and the greatly modified Canadair CP-107 Argus maritime patrol aircraft.
context_section_description: Data from Britannia... Last of the Bristol Line
  General characteristics
  Crew: 4–7
  Capacity: 139 passengers (coach class)
  Length: 124 ft 3 in (37.87 m)
  Wingspan: 142 ft 3 in (43.36 m)
  Height: 37 ft 6 in (11.43 m)
  Wing area: 2,075 sq ft (192.8 m²)
  Airfoil: root: NACA 25017; tip: NACA 4413
  Empty weight: 86,400 lb (39,190 kg) 
  Max takeoff weight: 185,000 lb (83,915 kg)
  Powerplant: 4 × Bristol Proteus 765 turboprop engines, 4,450 shp (3,320 kW)  each equivalent
  Propellers: 4-bladed
  Performance
  Maximum speed: 397 mph (639 km/h, 345 kn) 
  Cruise speed: 357 mph (575 km/h, 310 kn) at 22,000 ft (6,706 m)
  Range: 4,430 mi (7,130 km, 3,850 nmi)
  Service ceiling: 24,000 ft (7,300 m) 
  Avionics
  EKCO E120 weather radar
caption: The flight deck of Britannia 312 G-AOVT
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