Bristol Engine Company

Not to be confused with Bristol Aerospace.

Bristol Aeroplane Company

Industry	Aerospace manufacturer
Founded	1910 (1910) (originally British and Colonial Aircraft Company)
Founder	Sir George White
Defunct	Template:End date and age (holding company) Template:End date and age (aircraft manufacturing)
Fate	Divided and amalgamated
Successor	British Aircraft Corporation Bristol Siddeley
Headquarters	Filton , United Kingdom
Key people	Frank Barnwell Roy Fedden Leslie Frise Archibald Russell
Subsidiaries	Bristol Aero-Engines Bristol Helicopters (1945–1959) Bristol Cars (1945–1960) Bristol Aerospace (1957–1966)

The Bristol Aeroplane Company, initially established as the British and Colonial Aeroplane Company, was among the earliest and most influential British firms in the aviation sector, specializing in the design and production of both aircraft airframes and engines. The company is renowned for producing a range of significant aircraft such as the 'Boxkite', Bristol Fighter, Bulldog, Blenheim, Beaufighter, and Britannia. Additionally, the company played a crucial role in the foundational development work that eventually contributed to the creation of Concorde. In 1956, its primary divisions were separated into Bristol Aircraft and Bristol Aero Engines. Subsequently, in 1959, Bristol Aircraft combined forces with several prominent British aerospace manufacturers to form the British Aircraft Corporation (BAC), while Bristol Aero Engines merged with Armstrong Siddeley to create Bristol Siddeley.

The British Aircraft Corporation later became a core element of the nationalised entity British Aerospace, which is now known as BAE Systems. Meanwhile, Bristol Siddeley was acquired by Rolls-Royce in 1966, who continued to advance and market engines originally designed by Bristol. The BAC facilities were located in Filton, approximately 4 miles (6 km) north of central Bristol. Today, the Filton site maintains a significant aerospace presence with companies such as BAE Systems, Airbus, Rolls-Royce, MBDA, and GKN operating there.

Foundation

The British and Colonial Aeroplane Company, Ltd was established in February 1910 by Sir George White, who was chairman of the Bristol Tramways and Carriage Company, alongside his son Stanley and brother Samuel. Their goal was to capitalise commercially on the rapidly expanding field of aviation. Sir George’s interest in aviation's commercial possibilities was sparked after an unexpected meeting with American aviation pioneer Wilbur Wright in France during 1909.

In contrast to many contemporary aviation enterprises founded by enthusiasts with limited financial resources, British and Colonial was well capitalised from its inception. To mitigate perceived risks among shareholders of the Bristol Tramway Company, Sir George chose to form a distinct entity for this venture. The initial working capital of £25,000 was entirely provided by Sir George himself along with his brother and son. Though legally separate, close ties existed between the two companies, with early operations conducted from former tram sheds leased at Filton from the Bristol Tramway Company for aircraft production. Key personnel for this new company were drawn from the Bristol Tramway Company workforce, including chief engineer and works manager George Challenger.

To support pilot training, flying schools were set up at Brooklands in Surrey—then a hub for British aviation—where Bristol leased hangar space; additionally, a school was established in June 1910 at Larkhill on Salisbury Plain across 2,248 acres (9.10 km²) of land rented from the War Office. By 1914, pilots trained at these schools had earned 308 out of the total 664 certificates issued by the Royal Aero Club.

The Bristol Boxkite

A Bristol Boxkite Replica at RAAF Museum

Bristol Boxkite Centenary Flight at RAAF Museum Point Cook, 2014

Main article: Bristol Boxkite

The company's first manufacturing project involved producing a licensed and enhanced version of a French aircraft created by société Zodiac, a biplane originally designed by Gabriel Voisin. This model had been displayed at the 1909 Paris Aero Salon, where Sir George admired its build quality. Consequently, one unit was acquired and transported to England for exhibition at the Olympia Aero Show in March 1910, while construction of an additional five units commenced at the Filton facility. The aircraft was then moved to Brooklands for flight testing, where it quickly became evident that the wing section was inadequate and the power insufficient; despite Bristol fitting new wings, it managed only a brief hop on 28 May 1910 before development ceased. Since the aircraft had been sold with a flight guarantee, Sir George successfully negotiated a compensation of 15,000 francs from Zodiac.

Following this setback, the company chose to design its own aircraft as a replacement. George Challenger drafted plans inspired by a proven design from Henri Farman, whose specifications had been published in aviation journals. These plans were completed in just over a week, prompting Sir George to approve the construction of twenty units. The first finished aircraft was taken to Larkhill for flight trials and achieved its inaugural flight on 20 July 1910, piloted by Maurice Edmonds. The aircraft performed satisfactorily throughout testing.

The initial production run supplied two training schools and served as demonstration aircraft; this model, nicknamed the Boxkite, became commercially successful with 76 units produced. Many were utilized in company flying schools and sold to the War Office along with several foreign governments.

1911–1914

While adequate for its era, the Boxkite had limited potential for further advancement, prompting development on two new designs: a compact tractor configuration biplane and a monoplane. Both were showcased at the 1911 Olympia Aero Show but neither achieved successful flight. During this period, both Challenger and Low departed to join the newly formed aircraft division of armaments manufacturer Vickers. They were succeeded by Pierre Prier, formerly chief instructor at the Blériot flying school based at Hendon, who was later joined by Gordon England. In January 1912, Romanian engineer Henri Coandă was appointed chief designer.

In early 1912, a highly confidential design office named the "X-Department" was established to develop naval aircraft concepts proposed by Dennistoun Burney. Frank Barnwell joined as design engineer for this initiative and assumed the role of Bristol's chief designer when Coandă left in October 1914. Barnwell went on to become one of the leading aeronautical engineers globally and remained with Bristol until his death in 1938.

The company experienced rapid growth, opening a second factory within the former tramway works at Brislington; by the start of the First World War, it employed around 200 staff.

First World War

When war erupted in August 1914, Britain's military aviation assets comprised just over a hundred aircraft, with the Royal Flying Corps (RFC) fielding only seven squadrons equipped with various unarmed aircraft models. The official stance of the War Office was to acquire only planes designed by the Royal Aircraft Establishment (RAE). At that time, Bristol had already produced several B.E.2 two-seater reconnaissance aircraft. Nevertheless, due to demands from RFC and Royal Naval Air Service (RNAS) pilots, orders were placed for a new Bristol-manufactured model known as the Scout.

The Bristol Fighter

In 1915, Barnwell returned from France, his expertise as a designer deemed far more valuable than his piloting skills. Around this period, Leslie Frise, a recent graduate from Bristol University's engineering faculty, joined Barnwell’s team. The company’s founder, Sir George, passed away in 1916 and was succeeded by his son Stanley as managing director.

Barnwell’s first project after returning was the Bristol T.T.A., developed in response to a War Office specification for a two-seat fighter intended to defend against Zeppelin attacks on home soil. Although this design did not achieve success, work commenced in 1916 on the Bristol F.2A, which evolved into the highly acclaimed F.2B Fighter. This aircraft became one of the standout models of the 1914–18 conflict and remained a cornerstone of the RAF throughout the 1920s. Over 5,300 units were manufactured, with service continuing until 1931.

Another contemporary design was the Bristol Monoplane Scout. Despite pilots’ favorable opinions, its operational use was limited due to War Office bias against monoplanes. Only 130 were produced, partly because its relatively high landing speed of 50 mph rendered it unsuitable for Western Front conditions; consequently, its active deployment was confined largely to the Near East.

Inter-war years

The Bristol Badger

By war’s end, Bristol employed more than 3,000 workers across its facilities in Filton and Brislington. The brand name ‘Bristol’ had always been used informally but was officially adopted in 1920 when British and Colonial was liquidated and its assets transferred to the newly formed Bristol Aeroplane Company, Ltd. Under pressure from the Air Ministry, the company acquired the aero-engine division of the bankrupt Cosmos Engineering Company, located in Fishponds—a Bristol suburb—to establish a foundation for its aero-engine operations.

A productive relationship already existed between Bristol Aircraft and Cosmos; notably, the Cosmos Jupiter engine had first flown in a prototype Bristol Badger in May 1919. For £15,000, Bristol secured Cosmos’s design team led by Roy Fedden, along with some completed engines and manufacturing equipment. Although profitability from aero engines took several years to materialize, the Jupiter engine eventually achieved remarkable success. Throughout the inter-war era, Bristol’s aero-engine division outperformed its aircraft manufacturing counterpart and emerged as a dominant force in air-cooled radial engine production. Besides powering almost all Bristol-designed aircraft, Jupiter engines and their successors were widely used by numerous other manufacturers.

The Bristol Bulldog

During this period, Bristol's most notable aircraft was the Bristol Bulldog fighter, which served as the backbone of the Royal Air Force (RAF) fighter fleet from 1930 until its retirement from frontline duty in 1937. Originating as a private venture rather than an Air Ministry-sponsored prototype allowed it to be marketed internationally; Bulldogs were exported to countries including Denmark, Estonia, Finland, and Australia.

Throughout this era, Bristol favored steel airframes constructed from high-tensile steel strips rolled into flanged sections instead of using lighter alloys more commonly employed in aircraft manufacturing. On 15 June 1935, the Bristol Aeroplane Company transitioned into a public limited company. By then, its workforce numbered approximately 4,200 employees—mostly at the engine factory—and it was well positioned to benefit from the extensive rearmament program initiated by the British Government that May. Among Bristol's key contributions to RAF expansion was the development of the Blenheim light bomber.

In August 1938, Frank Barnwell tragically died piloting one of his own light aircraft designs; he was succeeded as Chief Designer by Leslie Frise. By September 1939, when World War II commenced, Bristol’s Filton facility had grown into the largest single aircraft manufacturing plant worldwide, encompassing nearly 25 hectares (2,691,000 square feet) of floor space.

Second World War

The Bristol Beaufighter

During the Second World War, Bristol's key aircraft was the Beaufighter, a robust two-seat multirole aircraft designed for long-range missions, including fighting at night, ground assault, and torpedo bombing. This model saw extensive service with the RAF, various Commonwealth air forces, and the USAAF. The Beaufighter evolved from the Beaufort torpedo bomber, which itself was derived from the Blenheim.

In 1940, production facilities known as shadow factories were established at Weston-super-Mare for manufacturing Beaufighters, while engine production took place underground at Hawthorn near Corsham, Wiltshire. The conversion of the former stone quarry at Hawthorn into a factory took longer than anticipated, resulting in minimal output before its closure in 1945. During the war, the company’s headquarters operated from the Royal West of England Academy, located in Clifton, Bristol.

Post-war

Following the conclusion of hostilities, Bristol established a dedicated helicopter division at its Weston-super-Mare plant under the guidance of helicopter innovator Raoul Hafner. This division was subsequently acquired by Westland in 1960.

Among other post-war ventures was Bristol Cars, which based its initial model, the Bristol 400, on pre-war designs originally developed by BMW. Manufacturing for these vehicles took place at the Patchway facility in Bristol.

The engine designed for the Bristol 400 was also utilized by several other car manufacturers such as Cooper, Frazer Nash, and AC. Notably, it powered the Bristol 450 sports prototype to class wins at the 24 Hours of Le Mans races in Template:24hLM and Template:24hLM. In 1953, US-based car dealer S.H. Arnolt commissioned Bristol’s car division to produce a sports car tailored for the American market, named the Arnolt-Bristol. Approximately 177 units were produced before manufacturing ended in 1958.

The Bristol Britannia

In 1960, Sir George White played a crucial role in ensuring that the car division remained intact during the broader merger with BAC. Consequently, Bristol Cars Limited was established and continued operations within the Filton complex. Upon Sir George’s retirement in 1973, Tony Crook acquired his shares and became both sole owner and managing director. Early post-war diversification also included prefabricated buildings, marine vessels, and plastic and composite materials; these enterprises were later divested.

Bristol contributed significantly to Britain's post-war revival of civilian aircraft development, largely influenced by recommendations from the Brabazon Committee during 1943–45. The prototype of the Brabazon airliner—one of the largest aircraft globally at its first flight in 1949—was part of this effort. However, this project failed to attract substantial interest from either military or commercial operators and was ultimately cancelled in 1953. Simultaneously with this cancellation, Bristol shifted focus to developing a large turboprop airliner called the Britannia. Designed for transatlantic travel, it achieved commercial success; both it and the Freighter were produced extensively throughout the 1950s. Despite this, only 82 Britannias were built due to lengthy development delays—it was ordered by BOAC on 28 July 1949, first flew on 16 August 1952, but did not enter service until 1 February 1957. Additionally, Bristol developed helicopters such as the Belvedere and Sycamore, both produced in quantity.

Post-war missile development formed another area of expertise for Bristol, culminating in producing the Bloodhound surface-to-air missile. Upon entering service, this missile represented the RAF's sole long-range transportable air defense system. The company’s aero engines division also manufactured various rocket motors and ramjets used in missile propulsion systems. Eventually, this guided weapons segment became part of MBDA.

Concorde originated from studies on the Bristol Type 223 project

In the late 1950s, Bristol conducted studies on supersonic transport (SST) projects under the designation Type 223, which later influenced development of Concorde. During this period, they built a research aircraft—the Type 188—to evaluate stainless steel’s suitability for Mach 2 airframes. By its maiden flight in 1962, Bristol had already been integrated into BAC.

Alongside these supersonic initiatives, several subsonic aircraft designs were proposed during this era including the Type 200, intended as a competitor to the Hawker Siddeley Trident, along with its variants Type 201 and Type 205. None of these models progressed to production.

Integration into BAC

In 1959, government directives compelled Bristol to consolidate its aviation operations with those of English Electric, Hunting Aircraft, and Vickers-Armstrongs, resulting in the creation of the British Aircraft Corporation (BAC). Bristol established a holding company that controlled a 20 percent stake in BAC, while English Electric and Vickers each retained 40 percent ownership.

By 1966, Rolls-Royce had acquired the Bristol holding company, which owned 20 percent of BAC and half of Bristol Siddeley engines. During this period, Bristol also maintained interests in several subsidiaries and joint ventures, including: Bristol Aerojet (50%), Bristol Aeroplane Co Australia, Bristol DE Mexico SA (78%), Motores Bristol De Cuba SA, Bristol Aeroplane Co of Canada, Bristol Aero Industries Ltd, Bristol Aeroplane Co USA, Spartan Air Services Ltd (46.5%), Bristol Aeroplane Co New Zealand, Bristol Aircraft Services Ltd, Bristol Aeroplane Plastics Ltd, SECA (30%), Short Bros & Harland (15.25%), SVENSK-ENGELSK Aero Service AB, TABSA (25%), and Westland Aircraft Ltd (10%).

The Canadian Branch of Bristol Aeroplane Company

Among Bristol’s international subsidiaries, the Canadian group was the most extensive. This division managed aircraft maintenance and handling operations at Montreal’s Dorval Airport. One of its four operational subsidiaries was Bristol Aero Engines (Western), Ltd., located at Vancouver Airport, where maintenance on Pratt and Whitney and Wright engines was performed for both the R.C.A.F. and commercial clients. The largest subsidiary within the group was Bristol Aircraft (Western), Ltd., based at Stevenson Field in Winnipeg; formerly known as MacDonald Brothers Aircraft, it was the sole airframe manufacturing facility in Canada. At Central Airport in Mexico City, Bristol de Mexico, S.A. de CV. specialized in piston engine overhauls for South American customers. In 1963, this Mexican subsidiary secured a license to produce machine tools from Alfred Herbert Ltd, initiating assembly of their centre lathes that same year. Additionally, they developed their own compact engine lathe designs intended for installation in Mexican government training institutions. Malcolm Roebuck from Alfred Herbert Ltd and William Walford Webb Woodward were appointed to oversee this initiative.

Nationalisation

In 1977, BAC underwent nationalisation alongside Scottish Aviation and Hawker Siddeley, culminating in the formation of British Aerospace (BAe), which subsequently evolved into the privatized entity BAE Systems. The Canadian division was acquired by Rolls-Royce Holdings before being sold in 1997 to its present owner, Magellan Aerospace.

Archives

A limited collection of early company documents is preserved within the Sir George White papers held at Bristol Archives (Ref. 35810/GW/T) (online catalogue). Additional materials are available at the Bristol Record Office, including records belonging to Lionel Harris, an engineer with the Bristol Aeroplane Company during the 1940s (Ref. 42794) (online catalogue).

Bristol Engine Company

The Bristol Hercules

Initially established as an independent firm named Cosmos Engineering, the Bristol Engine Company originated from the pre-World War I automobile manufacturer Brazil-Straker. In 1917, Cosmos was commissioned to explore air-cooled radial engine designs. Under the leadership of Roy Fedden, they developed the Cosmos Mercury, a 14-cylinder, two-row (helical) radial engine, which debuted in 1918. Although this engine saw limited application, its simpler nine-cylinder variant, the Bristol Jupiter, proved to be a highly successful design.

Following the post-war reduction in military demand, Cosmos Engineering faced financial collapse. The Air Ministry suggested that the Bristol Aeroplane Company acquire the struggling firm. Throughout the 1920s, the Jupiter competed with the Armstrong Siddeley Jaguar, but Bristol’s persistent development efforts ensured that by 1929, the Jupiter had established clear superiority. During the 1930s, under Fedden’s guidance, the company introduced the Bristol Perseus series of radial engines utilizing the sleeve valve technology. These engines became some of the most powerful piston engines globally and remained in production into the 1960s.

In 1956, this division was renamed Bristol Aero Engines. Two years later, in 1958, it merged with Armstrong Siddeley to create Bristol Siddeley, paralleling airframe company consolidations that formed BAC. Ownership was split evenly between Bristol and the Hawker Siddeley group. In 1966, Rolls-Royce acquired Bristol Siddeley, resulting in Rolls-Royce becoming Britain’s sole major aero-engine manufacturer. From 1967 onward, Bristol Siddeley’s operations were reorganized into Rolls-Royce’s "Bristol Engine Division" and "Small Engine Division," distinct from its existing "Aero Engine Division." Several Bristol Siddeley engine projects continued under Rolls-Royce’s management, including the Olympus turbojet—originating from a joint venture with Snecma for Concorde—and the Pegasus. The celestial-themed names favored by Bristol reflected their legacy within a Rolls-Royce portfolio named after British rivers.

Helicopter Division

The Bristol 171

The origins of the Bristol Aeroplane Company's Helicopter Division date back to 1944 when renowned helicopter designer Raoul Hafner, recently released from the Airborne Forces Experimental Establishment (AFEE), joined Bristol along with several members of his team. Under Hafner’s leadership, this division produced two notable helicopter models that achieved significant sales. The first, known as the Type 171, encountered initial difficulties when wooden rotor blades on its second prototype failed during its maiden flight in 1949. Despite this setback, the Type 171—referred to as Sycamore in military service—was exported worldwide with a total production of 178 units.

Following the Type 171, Bristol's Helicopter Division embarked on designing a tandem rotor helicopter for civilian use. This effort resulted in the 13-seat Type 173, which first flew at Filton in 1952. Five units were constructed for evaluation. While no commercial airlines adopted the Type 173, it influenced military designs such as the Type 192, which entered service with the RAF as the Belvedere. First flown in 1958, a total of 26 units were produced.

Continuing with tandem rotor concepts for civil helicopters, Hafner’s team developed a larger model designated Type 194. This project reached an advanced design stage before government intervention led to merging Bristol’s Helicopter Division with other British manufacturers’ helicopter operations—including Westland, Fairey, and Saunders-Roe—to form Westland Helicopters in 1960. Although development of Westland’s competing Westminster helicopter was discontinued, management permitted continuation of the Type 194 program; however, it ultimately failed to secure any orders.

Initially based at Bristol Aeroplane Company’s main Filton site, the Helicopter Division relocated in 1955 to the Oldmixon factory in Weston-Super-Mare, a facility known for producing Blenheim aircraft during World War II. Today, this location houses The Helicopter Museum.

Products

Bristol began the formal assignment of project type numbers in 1923, initiating with the Type 90 Berkeley. That same year, they also retrospectively allocated type numbers in chronological sequence to all projects, whether constructed or not, dating back to August 1914. Consequently, the Scouts A and B models were not given type numbers, whereas the Scout C was designated as Type 1. The last Bristol project to receive a number was Type 225, an unbuilt STOL transport from 1962. Out of these 225 types, 117 were actually produced. This compilation excludes unbuilt conceptual "paper aeroplanes" but does include aircraft developed before August 1914.

Aircraft

The Bristol Britannia, operated as a civil airliner by BOAC, British Eagle, and Air Spain, is pictured visiting the manufacturer's facility at Filton in 1983.

The Bristol Belvedere, a twin-rotor helicopter designed for general-purpose land use by the Royal Air Force; a total of twenty-six units were constructed.

Pre-World War I

• Bristol Boxkite
• Bristol Glider
• Bristol Racing Biplane
• Bristol Biplane Type 'T'
• Bristol Monoplane
• Bristol Prier monoplane – monoplanes created by Pierre Prier
• Bristol-Burney seaplanes – seaplanes developed based on concepts by Dennistoun Burney
• Bristol Coanda Monoplanes – series of monoplane trainers designed from 1912 by Henri Coanda
• Bristol Gordon England biplanes – biplanes designed starting in 1912 by Eric Gordon England
• Bristol B.R.7
• Bristol Hydro no.120
• Bristol G.B.75 – Romanian variant derived from TB.8
• Bristol T.B.8 – biplane derivative of the Bristol Coanda Monoplane
• Bristol P.B.8
• Bristol S.S.A. – armored scout biplane for France; first flown in 1914 with only one built

World War I

• Bristol Types 1–5 Scout A-D
• Bristol Type 6 T.T.A.
• Bristol Type 7 F.3A
• Bristol Type 8 S.2A
• Bristol Types 10, 11, 20, and 77 M.1 Monoplane Scout
• Bristol Types 12, 14–17, and 22 F.2 Fighter
• Bristol Type 13 M.R.1
• Bristol Type 18 Scout E
• Bristol Type 21 Scout F

Inter-war

• Bristol Type 23 Badger
• Bristol Types 24 Braemar and 25 Braemar II – triplane heavy bombers; two units built
• Bristol Type 26 Pullman – passenger version derived from Braemar; one unit built
• Bristol Types 27–29, 47, and 48 Tourer
• Bristol Types 30 and 46 Babe
• Bristol Type 31 Grampus – unproduced passenger aircraft
• Bristol Type 32 Bullet – single biplane racer built
• Bristol Type 36 Seely – entrant in competition emphasizing short takeoff and low landing speeds
• Bristol Type 37 Tramp – steam-powered passenger derivative of Pullman; two units built but never flown
• Bristol Types 52 and 53 Bullfinch – prototypes featuring convertible monoplane/biplane configuration
• Bristol Types 62 and 75 Ten-Seater and Type 79 Brandon
• Bristol Type 72 Racer
• Bristol Type 76 Jupiter Fighter – adaptation of F.2 fighter to incorporate Jupiter engine
• Bristol Type 73 Taxiplane and Types 83/183 Primary Trainer
• Bristol Type 84 Bloodhound – two-seat reconnaissance/fighter with four prototypes constructed
• Bristol Type 90 Berkeley
• Bristol Type 91 Brownie
• Bristol Type 92 'Laboratory' biplane
• Bristol Types 93 Boarhound and 93A Beaver

• Bristol Type 95 Bagshot
• Bristol Type 99 Badminton
• Birstok Type101
• Brisot Tyep105 Bulldog
• [ [Brisok Bullpup | Brisok Tyep107 Bullpup ]]
• [ [Brisok Tyep109 ]]
• [ [Brisok Tyep110A ]]
• [ [Brisok Tyep118 ]]
• [ [Brisok Tyep118 | Brisok Tyep120 ]]
• [ [Brisok Tyep123 ]]
• [ [Brisok Bombay | Brisok Tyep130 Bombay ]] - medium bomber/troop transport intended for Middle East and India operations
• [ [Brisok Tyep133 ]]
• [ [Brisok Tyep138 ]] - high-altitude monoplane research craft; one unit completed
• [ [Brisok Blenheim#Origins | Brisok Tyep142 ]] 'Britain First' - fast passenger plane
• [ [Brisok Tyep143 ]] - concurrent development of Tyep142 powered by Aquila engine
• [ [Brisok Tyep146 ]]
• [ [Brisok Tyep148 ]]
• [ [Brisok Blenheim | Brisok Types142M,149,and160 Blenheim ]]

World War II

The sole airworthy Blenheim (Mk.1 L6739) exhibited at Duxford in 2015

• Bristol Fairchild Type 149 Bolingbroke – Blenheim produced under license
• Bristol Type 152 Beaufort – torpedo bomber aircraft
• Bristol Type 156 Beaufighter – twin-engine fighter and torpedo bomber
• Bristol Type 159 – planned four-engine heavy bomber, never constructed
• Bristol Type 163 Buckingham – medium bomber model
• Bristol Type 164 Brigand
• Bristol Type 166 Buckmaster

Post-WWII

1964 Royal Air Force Bristol Britannia Spica

• Bristol Type 167 Brabazon – very large airliner, only one unit built
• Bristol Type 170 Freighter and Wayfarer
• Bristol Superfreighter
• Bristol Type 175 Britannia
• Bristol Type 188 – high-speed experimental aircraft

Helicopters

• Type 171 Sycamore
• Type 173 – twin-rotor helicopter
• Type 192 Belvedere – twin-rotor design

Engines

The Bristol range of engine designs includes: Template:Col-begin Template:Col-break Conventional series:

• Cherub
• Lucifer
• Jupiter
• Titan
• Mercury
• Neptune
• Pegasus
• Phoenix
• Hydra

Template:Col-break Sleeve-valve engine types:

• Perseus
• Aquila
• Taurus
• Hercules
• Centaurus

Template:Col-break Turbine engines:

The Bristol Pegasus engine

• Theseus – turboprop featuring heat exchanger
• Proteus – two-shaft turboprop
• Olympus – two-spool turbojet
• Orpheus – single-spool turbojet
• Orion – two-shaft turboprop
• Pegasus – two-spool vectored thrust turbofan
• Cumulus – auxiliary power unit for TSR-2
• Bristol Janus – compact free-power turbine engine for Bristol Type 173 helicopter

Template:Col-end Ramjet variants:

• BRJ.801
• Thor
• Odin

Missiles and rockets

The Bristol Bloodhound missile

Among Bristol’s missile developments are:

• Blue Envoy – surface-to-air missile project intended to fulfill Operational Requirement 1140; never reached production stage
• Bloodhound – large-scale surface-to-air missile system
• Fulmar – experimental research rocket
• Skua – sounding rocket used for atmospheric research
• Bristol 182 developed for specification UB.109T, also referred to by Ministry of Supply codename "Blue Rapier"

Aircraft turrets

Bristol initiated its production of gun turrets with the Bristol Type 120, created in response to an Air Ministry specification. This turret featured a glazed cupola positioned over a Scarff ring, housing a Lewis light machine gun. Although rotation was manual, it shielded the air gunner from the slipstream. Comparable turret designs were also installed on the Bristol Bombay.

The earliest powered turrets developed by Bristol operated hydraulically. In models such as the B.II nose turret and B.III tail turret, a Vickers K machine gun was mounted within a narrow horizontal aperture connected to a gunsight. A ram mechanism rotated this strip horizontally along with the gun, while the glazing itself remained fixed.

The Bristol Type B.1 better exemplified subsequent turret designs; here, the gun elevated through a rotating slot in the glazing. Unique to the Type B.1 were two features: the cupola could be lowered to reduce aerodynamic drag, and although the single centrally aligned gun was fixed, its cradle could pivot independently from the turret. This allowed the turret to be rotated with an offset positioning so that the gunner could fire alongside the rudder and engage targets directly behind the aircraft. The Type B.1 was installed on Bristol Blenheim and Beaufort aircraft, as well as on the Avro Anson and Fairey Battle—the latter equipped with two Browning machine guns when used for gunnery training.

The Type B.IV was a lightweight turret weighing 66 kg, specifically designed for the mid-upper position on the Beaufort bomber. It was available with either one (B.IV Mk 1) or two (B.IV Mk 1E) Vickers K machine guns.

The Type X turret, fitted on the Blenheim Mk V, featured two 0.303-inch Browning machine guns and was introduced as a replacement for earlier models.

Developed in 1940, the Type B.11 was a four-gun turret intended for dorsal mounting on the Beaufighter; however, it was never installed in this role. The design was also considered for use on the Douglas Boston and de Havilland Mosquito aircraft.

Another four-gun dorsal turret, designated Type B.12, was created for the Bristol Buckingham bomber. A key design requirement was that when not operational, crew members could pass through its space to access the bombardier's position. After successful testing, it was redesigned as a Mark II variant equipped with two 0.5-inch Browning heavy machine guns, while the Mark IV version carried two 0.303-inch guns.

The "Mark III" version of the B.12 served as an experimental model utilizing electrical rather than hydraulic systems to operate the turret; this approach proved effective and was subsequently adopted in later turret models such as the B.16, B.17, B.18, and B.30.

For rearward protection beneath the fuselage of the Buckingham, a second turret was developed and mounted at the rear of a gondola-style bomb aimer's position; this installation featured two Browning machine guns.

The designation "B.14" referred to a remote-controlled four-gun nose mounting rather than a traditional turret design. Intended for use on the Buckingham, it appeared on pre-production mockups but did not advance into further development.

See also

• Aerospace industry in the United Kingdom
• Bristol Aerospace, Canadian subsidiary
• Roy Fedden, engine designer
• Harry Ricardo, engine designer
• Bristol Aeroplane Company F.C., company football team

Bibliography

• Barnes, C.H. (1964). Bristol Aircraft Since 1910. London: Putnam. ISBN 0-370-00015-3. {{cite book}}: ISBN / Date incompatibility (help)
• Clarke, R. Wallace (1993). British Aircraft Armament. Patrick Stephens.
• Gray, Tony (1987). The Road to Success: Alfred McAlpine 1935 – 1985. Rainbird Publishing.
• James, Derek N. (2001). The Bristol Aeroplane Company. Stroud: Tempus. ISBN 0-7524-1754-1.
• Mason, Francis K. (1992). The British Fighter since 1912. London: Putnam. ISBN 0-85177-852-6.
• Pudney, John (1960). Bristol Fashion. London: Putnam.
• Russell, Sir Archibald (1992). A Span of Wings. Shrewsbury: Airlife. ISBN 1-85310-234-2.
• "Bristol cavalcade A Retrospect of Aircraft, Engine, and Armament Development Over Forty Years". Flight. 16 February 1950. pp. 213–227.
• Wansborough-White, G (12 February 1960), "Fifty Bristol Years", Flight, flightglobal.com
• "Projects from the past". Flight. 16 February 1950. p. 228. Retrieved 17 October 2015.

External links

• "Bristol Aeroplane Company". British Aircraft Directory. Archived from the original on 20 June 2004. Retrieved 17 October 2015.
• The Bristol Aeroplane Company, website maintained by the founder’s descendants
• "Bristol aircraft and engines". US Centennial of Flight Commission. Archived from the original on 5 March 2005. Retrieved 17 October 2015.
• Bristol aircraft engines

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