Bristol Britannia

Type 175 Britannia
BOAC Britannia Model 312 on a transatlantic flight at Manchester Airport in 1962.
General information
Type	Turboprop airliner
Manufacturer	Bristol Aeroplane Company
Designer	Dr. Archibald E. Russell[1]
Status	Retired
Primary users	BOAC Royal Air Force Canadian Pacific Air Lines Cubana de Aviación
Number built	85
History
Manufactured	1952–1960
Introduction date	1 February 1957 with BOAC
First flight	16 August 1952
Variants	Canadair CP-107 Argus Canadair CL-44/Canadair CC-106 Yukon Conroy Skymonster

The Bristol Type 175 Britannia is a retired British medium-to-long-range airliner built by the Bristol Aeroplane Company in 1952 to meet British civilian aviation needs. 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, the 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.^[2][3]

Canadair purchased a licence to build the Britannia in Canada, adding another 72 aircraft in two variants. These were the stretched Canadair CL-44/Canadair CC-106 Yukon, and the greatly modified Canadair CP-107 Argus maritime patrol aircraft.