Bristol Mercury radial engine

E362553

air-cooled engine aircraft piston engine radial engine

The Bristol Mercury radial engine is a British air-cooled, nine-cylinder aircraft engine widely used in the 1930s and World War II, known for powering numerous fighters and bombers.

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All labels observed (5)

Label	Occurrences
Bristol Mercury radial engine canonical	3
Bristol Mercury engine	2
Bristol Mercury IX radial engine	1
Bristol Mercury XV engine	1
WM K-14 radial engine	1

How this entity was disambiguated

This entity first appeared as the object of triple T3509328 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Bristol Mercury radial engine
Context triple: [Bristol Blenheim, engineType, Bristol Mercury radial engine]

A. Bristol Hercules radial engine
The Bristol Hercules radial engine was a British air-cooled, sleeve-valve aircraft engine widely used in World War II bombers and other military aircraft for its reliability and high power output.
B. Bristol Pegasus radial engine
The Bristol Pegasus radial engine was a widely used British air-cooled aircraft engine of the interwar and World War II era, powering numerous bombers and transport aircraft.
C. Bristol Centaurus radial engine
The Bristol Centaurus radial engine was a powerful British air-cooled sleeve-valve aircraft engine used in late World War II and early postwar high-performance aircraft.
D. Wright R-1820 radial engine
The Wright R-1820 radial engine is a widely used American air-cooled, nine-cylinder aircraft engine that powered numerous military and civilian aircraft from the 1930s through World War II and beyond.
E. Pratt & Whitney R-1830 Twin Wasp radial engine
The Pratt & Whitney R-1830 Twin Wasp is a widely used American 14-cylinder air-cooled radial aircraft engine of the World War II era, powering numerous fighters, bombers, and transport aircraft.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Bristol Mercury radial engine
Target entity description: The Bristol Mercury radial engine is a British air-cooled, nine-cylinder aircraft engine widely used in the 1930s and World War II, known for powering numerous fighters and bombers.

A. Bristol Hercules radial engine
The Bristol Hercules radial engine was a British air-cooled, sleeve-valve aircraft engine widely used in World War II bombers and other military aircraft for its reliability and high power output.
B. Bristol Pegasus radial engine
The Bristol Pegasus radial engine was a widely used British air-cooled aircraft engine of the interwar and World War II era, powering numerous bombers and transport aircraft.
C. Bristol Centaurus radial engine
The Bristol Centaurus radial engine was a powerful British air-cooled sleeve-valve aircraft engine used in late World War II and early postwar high-performance aircraft.
D. Wright R-1820 radial engine
The Wright R-1820 radial engine is a widely used American air-cooled, nine-cylinder aircraft engine that powered numerous military and civilian aircraft from the 1930s through World War II and beyond.
E. Pratt & Whitney R-1830 Twin Wasp radial engine
The Pratt & Whitney R-1830 Twin Wasp is a widely used American 14-cylinder air-cooled radial aircraft engine of the World War II era, powering numerous fighters, bombers, and transport aircraft.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	air-cooled engine ⓘ aircraft piston engine ⓘ radial engine ⓘ
application	bomber aircraft ⓘ fighter aircraft ⓘ trainer aircraft ⓘ
bore	146 mm ⓘ
compressionRatio	variedByVariant ⓘ
coolingSystem	air-cooled ⓘ
countryOfOrigin	United Kingdom ⓘ
cylinderConfiguration	single-row radial ⓘ
designCompany	Bristol Engine Company ⓘ
designer	Roy Fedden ⓘ
displacement	about 25 litres ⓘ
enteredService	late 1920s ⓘ
era	World War II ⓘ interwar period ⓘ
firstRunDate	1925 ⓘ
fuelType	aviation gasoline ⓘ
manufacturer	Bristol Aeroplane Company ⓘ
notableFeature	compact diameter for its power class ⓘ reliable operation ⓘ wide operational use in Europe ⓘ
numberOfCylinders	9 ⓘ
poweredAircraft	Avro Anson (some variants) ⓘ linked to: Avro Anson Bristol Blenheim ⓘ Bristol Bulldog ⓘ Bristol Type 142 (Blenheim prototype) ⓘ linked to: Bristol Type 142 Fairey Battle (some variants) ⓘ linked to: Fairey Battle Fokker D.XXI ⓘ Gloster Gladiator ⓘ Miles Master (some variants) ⓘ linked to: Miles Master PZL P.11 ⓘ PZL.23 Karaś ⓘ PZL.37 Łoś ⓘ Westland Lysander ⓘ
powerOutput	approximately 500–600 horsepower in early variants ⓘ approximately 800 horsepower maximum in later variants ⓘ
productionPeriodEnd	1940s ⓘ
productionPeriodStart	1920s ⓘ
stroke	165 mm ⓘ
successor	Bristol Hercules ⓘ Bristol Pegasus ⓘ
supercharger	single-stage supercharger ⓘ
usedBy	Finnish Air Force ⓘ Polish Air Force ⓘ Royal Air Force ⓘ Royal Canadian Air Force ⓘ Royal Hellenic Air Force ⓘ linked to: Hellenic Air Force
usedInConflict	Second World War ⓘ linked to: World War II Spanish Civil War ⓘ
valvetrain	overhead poppet valves ⓘ

How these facts were elicited