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Bristol Brabazon

United Kingdom (1949)
National Flag Graphic
Origin: United Kingdom
Year: 1949
Type: Commercial Airliner / Passenger Transport
Manufacturer(s): Bristol Aeroplane Company - UK
Production: 1


Despite its size, the Bristol Brabazon proved too expensive to be a feasable commercial airliner in the post-World War 2 period.


Detailing the development and operational history of the Bristol Brabazon Commercial Airliner / Passenger Transport.  Entry last updated on 7/29/2015. Authored by Staff Writer. Content ©www.MilitaryFactory.com

The post-World War 2 Bristol "Brabazon" was born from committee work in 1943 and held direct origins in a wartime bomber design by the Bristol Aeroplane Company. The "Brabazon Committee" was headed by politician and English aviation pioneer Lord Brabazon (1st Baron Brabazon of Tara) and met to begin fleshing out the civil aviation environment to come in the post-war era. British airline industry was all but halted to concentrate on wartime fighters and bombers during the conflict and this left the civilian-hauling industry in limbo for some time. Several large aircraft types were devised by the committee and Bristol delivered a revised form of its heavy bomber as the "Model 167".

The company was granted funding for two flyable prototypes based on its proposal. The requirement called for a trans-Atlantic airliner to ferry a fair number of passengers from airports in Britain to major cities along the American East Coast. Performance was to come from 8 x Bristol Centaurus 18-cylinder radial engines driving paired contra-rotating propeller units, eight pairs fitted to wing leading edge nacelles. Internally, the fuselage would support up to 100 passengers in complete style - from large seating areas to a cinema, dining hall and full sleeping berths. Special skinning techniques were employed to keep the aircraft's weight in check and power-assisted control surfaces were made standard - the latter making the Brabazon the first aircraft anywhere to feature a wholly power-assisted control scheme. The initial prototype was designated Mk I.

To complete the massive bird, a special hangar was constructed while the fuselage was being built nearby. The test runway was lengthened to provide the necessary run for the big aircraft. Mk I tested her engines during December 1948 and recorded her first flight on September 4th, 1949. It was debuted for the public at Farnborough 1950 and conducted a dramatic flyby during its performance. Its next notable stop came at the Paris Air Show of 1951.
Its design was wholly 1950s with its raw silver metal skin left unfinished. The fuselage was tubular with the flight deck directly over the nose and a large vertical tail fin featured at rear. The wing mainplanes were set at midships and featured the engine propeller stems along the leading edges, just outboard of the fuselage sides. Exhaust ports were built into the engine trailing edges just ahead of the control surfaces. The horizontal tailplanes were low-mounted as set noticeable aft along the fuselage sides. The undercarriage was of a tricycle arrangement. Portholes dotted the fuselage sides for passenger viewing with some windows also situated along the fuselage roof.

The second prototype was Mk II and this form appeared back in 1946. Instead of the Centaurus engines featured in Mk I, MK II carried 8 x Bristol Proteus turboprop engines in a coupled arrangement. Each engine installation drove a large-diameter four-bladed propeller with a gearbox shared between each coupled unit. The coupling not only increased performance considerably but the airframe was also lightened as a result.

Despite the amount of time and money put into the project, airline companies showed little interest in the now-expensive and still in-development venture. Structural problems also arose which threatened the aircraft's lease on life going forward. On July 17th, 1953, the project was cancelled by the British government after no takers could be found - not even military operators. Both prototypes were then scrapped.

As completed, the Brabazon would have featured a complete flying crew of six for its 100 passengers. Dimensions included a length of 177 feet, a wingspan of 230 feet and a height of 50 feet - these values made it one of the largest aircraft built during the period. Empty weight was 145,100 pounds with a Maximum Take-Off Weight (MTOW) of 290,000 pounds reported. Each Centaurus engine outputted at 2,650 horsepower. Performance included a maximum speed of 300 miles per hour, a cruise speed of 250 miles per hour, a range out to 5,500 miles, a service ceiling of 25,000 feet and a rate-of-climb of 750 feet per minute.






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 300mph
Lo: 150mph
    This entry's maximum listed speed (298mph).

    Graph average of 225 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Bristol Brabazon Mk.1's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
Small airplane graphic
  Compare this entry against other aircraft using our Comparison Tool  
Global Operators:
United Kingdom (cancelled)
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Bristol Brabazon Mk.1 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
6


Dimension
LENGTH


Feet
177.17 ft


Meters
54 m


Dimension
WIDTH


Feet
229.66 ft


Meters
70 m


Dimension
HEIGHT


Feet
49.21 ft


Meters
15 m


Weight
EMPTY


Pounds
145,108 lb


Kilograms
65,820 kg


Weight
LOADED


Pounds
286,601 lb


Kilograms
130,000 kg

Engine icon
Installed Power - Standard Day Performance:
8 x Bristol Centaurus radial piston engines developing 2,650 horsepower each.

Performance
SPEED


Miles-per-Hour
298 mph


Kilometers-per-Hour
480 kph


Knots
259 kts


Performance
RANGE


Miles
5,530 mi


Kilometers
8,900 km


Nautical Miles
4,806 nm


Performance
CEILING


Feet
24,934 ft


Meters
7,600 m


Miles
4.72 mi


Performance
CLIMB RATE


Feet-per-Minute
750 ft/min


Meters-per-Minute
229 m/min

Armament - Hardpoints (0):

None.
Variants: Series Model Variants
• Brabazon Mk.I - Official Series Designation; only a single prototype was ever constructed as was a second unfinished fuselage; 8 x Bristol Centaurus 18-cylinder radial engines paired into the wings with 8 x paired contra-rotating propellers.
• Brabazon Mk.II - Second prototype with 8 x Bristol Proteus turboprop engines (coupled) driving 4-bladed propellers through common gearbox.