Bristol Bulldog

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Bristol Bulldog (Type 105)

The Bristol Bulldog was a British single‑seat fighter built in the 1920s by the Bristol Aeroplane Company, designed by Frank Barnwell. About 443 Bulldogs were made for the Royal Air Force and other countries.

First flight was on 17 May 1927, and it entered RAF service in 1929. It was retired in 1937.

What it looked like and how it worked: It was a biplane with an all‑metal frame and fabric covering. It was powered by a supercharged Bristol Jupiter VII engine and armed with two Vickers machine guns. The pilot had a good view thanks to a large cut‑out in the upper wing. The top wing carried Frise ailerons.

Development notes: Early plans for a Mercury‑powered fighter led to the Type 105 idea. Mock‑ups were built in 1927. A longer‑fuselage version, the Type 105A or Bulldog Mk II, flew in 1928. The first production Bulldog was the Mk I (delivered from 1929). A stronger Mk IIA followed with better wings and fuselage. One trainer version had swept wings and a larger tail fin to help spin recovery.

RAF service and export: The Bulldog impressed RAF pilots for maneuverability and strength, but had some spin issues fixed by the bigger tail. It did not see combat with the RAF. Some were sent to the Middle East during the Abyssinia Crisis (1935–36). It was withdrawn from Fighter Command in July 1937 and mainly used for training.

The Bulldog was exported to several countries, including Australia, Denmark, Estonia, Finland, Japan, Latvia, Siam (Thailand) and Sweden. Latvia sold 11 Bulldogs to Basque forces in the Spanish Civil War. Ten Bulldogs fought in the Finnish Winter War starting in 1939, scoring two kills. They also served in the Continuation War.

Replica: A working replica was built in Oregon, USA, between 2000 and 2022. It uses a Pratt & Whitney R‑1340 engine because the original Bristol Jupiter engine is hard to find.