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Bristol Bulldog


Single-Seat, Single-Engine Biplane Fighter Aircraft


Aviation / Aerospace

The Bristol Bulldog eventually made up about seventy percent of Britain's entire air defense force.



Authored By: Staff Writer | Last Edited: 4/26/2019 | Content ©www.MilitaryFactory.com
In 1926, the British Air Ministry put forth a specification for a radial-piston engine fighter design that could operate in daytime and nighttime with armed with twin Vickers-type machine guns and capable of engaging the top enemy bombers of the day. Bristol responded with the Bulldog I (Mk.I or Mark I) which was used as a developmental model to ultimately become the Bulldog II. The type would become one of Britain's most recognized aircraft creations in the years between both world wars serving with the host nation for some seven years as a frontline fighter. Some 443 examples were produced. The aircraft would serve in the Royal Air Force, Spanish Air Force, Finnish Air Force and the Royal Australian Air Force among others.

In configuration, the Bulldog II sported an all-metal fuselage with a fabric skin covering. The wings were arranged in a typical biplane fashion, equal spanning units with single bays and a single pair of parallel support struts. Power was supplied through the Bristol Jupiter VII series radial piston engine of 440 horsepower. Armament consisted of 2 x 7.7mm Vickers machine guns synchronized to fire through the spinning propeller via an interrupter gear. The undercarriage was fixed with a tail skid and both were designed with grass strip runways in mind. The pilot sat behind and underneath the upper wing assembly in an open air cockpit. The pilot was provided an oxygen supply for operations in high altitudes and even a short-wave two-way radio for communications. In many ways, these two additions were a glimpse into the future of military aviation and were noted collectively as quite the innovation. Optional armament included were 4 x 20lb bombs held under the wings.

The Bulldog II entered service in June of 1929 and effectively replaced the aging Gloster Gamecock and Armstrong Whitworth Siskin fighters then in frontline use. Bulldog II's would never see combat under the British banner but foreign users of the type fared well, particularly Finnish pilots using Bulldogs against their Soviet invaders in World War 2. Other foreign operators included Estonia, Siam (Thailand) and Denmark.

The Bristol Bulldog was inevitably replaced in RAF service by the Gloster Gauntlet. Designed of the Bulldog was headed up by Frank Barnwell, chief designer at Bristol. Other variants existed but were produced in limited numbers, the most notable among them were the two seat Bulldog TM trainer. Nakajima of Japan produced two examples of the Bulldog as the J.S.S.F.


Specifications



Year:
1929
Status
Retired, Out-of-Service
Crew
1
[ 443 Units ] :
Bristol Aeroplane Company - UK
National flag of Australia National flag of Denmark National flag of Estonia National flag of Finland National flag of Japan National flag of Latvia National flag of Spain National flag of Sweden National flag of Thailand National flag of United Kingdom Australia; Denmark; Estonia; Finland; Japan; Latvia; Siam (Thailand); Spain; Sweden; United Kingdom.
- Fighter
Length:
25.00 ft (7.62 m)
Width:
33.92 ft (10.34 m)
Height:
9.84 ft (3 m)
(Showcased structural dimension values pertain to the Bristol Bulldog II production model)
Empty Weight:
2,200 lb (998 kg)
MTOW:
3,490 lb (1,583 kg)
(Diff: +1,290lb)
(Showcased weight values pertain to the Bristol Bulldog II production model)
1 x Bristol Jupiter VII Radial Piston Engine developing 440 horsepower driving a two-bladed propeller unit at the nose.
(Showcased powerplant information pertains to the Bristol Bulldog II production model)
Max Speed:
174 mph (280 kph; 151 kts)
Service Ceiling:
27,001 feet (8,230 m; 5.11 miles)
Max Range:
275 miles (443 km; 239 nm)
Rate-of-Climb:
1,379 ft/min (420 m/min)
(Showcased performance values pertain to the Bristol Bulldog II production model; Compare this aircraft entry against any other in our database)
STANDARD, FIXED:
2 x 7.7mm Vickers Machine Guns in fixed, forward-firing mountings over the nose synchronized to fire through the spinning propeller blades.

OPTIONAL:
4 x 20lb conventional drop bombs.
(Showcased armament details pertain to the Bristol Bulldog II production model)
Bulldog I (MK.I) - Developmental Prototype Designation; 2 examples produced.
Bulldog II (Mk.II) - Main Production Model Designation; fitted with Bristol Jupiter VII engine of 440 horsepower; 92 examples produced.
Bulldog IIA (Mk.IIA) - Fitted with Bristol Jupiter VIIF engine of 490 horsepower; 268 examples produced.
Bulldog IIIA - (Mk.IIIA) Two examples produced.
Bulldog IVA - (Mk.IVA) Fitted with Bristol Mercury engine of 640 horsepower; 18 examples produced.
Bulldog TM (Type 124) - Two-Seat Trainer Model; 59 examples produced.
J.S.S.F - Nakajima license-production models; only 2 examples.
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