Bristol Pegasus radial engine

E167956

aircraft engine air‑cooled engine 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.

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All labels observed (6)

Label	Occurrences
Bristol Pegasus radial engine canonical	7
Bristol Pegasus engine	3
Bristol Pegasus XVIII radial engine	1
Bristol Pegasus XXII radial engine	1
Bristol Pegasus engines	1
PZL Bristol Pegasus radial engine	1

How this entity was disambiguated

This entity first appeared as the object of triple T1432157 — 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 Pegasus radial engine
Context triple: [Vickers Wellington, powerplant, Bristol Pegasus radial engine]

A. Mitsubishi Kinsei radial engine
The Mitsubishi Kinsei was a Japanese air-cooled radial aircraft engine widely used in World War II combat aircraft.
B. Rolls-Royce Avon engine
The Rolls-Royce Avon engine is a pioneering British axial-flow turbojet developed in the late 1940s that powered numerous military and civilian aircraft, including early jet airliners and fighters.
C. Rolls-Royce Merlin
The Rolls-Royce Merlin is a British liquid-cooled V12 piston aero engine renowned for powering iconic World War II aircraft such as the Spitfire, Hurricane, and Lancaster.
D. Rolls-Royce Griffon
The Rolls-Royce Griffon is a powerful British liquid-cooled V12 aero engine developed during World War II, best known for powering later, high-performance variants of the Supermarine Spitfire and other Royal Air Force aircraft.
E. Wright R-3350 Duplex-Cyclone radial engine
The Wright R-3350 Duplex-Cyclone is a powerful American 18-cylinder air-cooled radial aircraft engine widely used in World War II and early postwar bombers and airliners.
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 Pegasus radial engine
Target entity description: 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.

A. Mitsubishi Kinsei radial engine
The Mitsubishi Kinsei was a Japanese air-cooled radial aircraft engine widely used in World War II combat aircraft.
B. Rolls-Royce Avon engine
The Rolls-Royce Avon engine is a pioneering British axial-flow turbojet developed in the late 1940s that powered numerous military and civilian aircraft, including early jet airliners and fighters.
C. Rolls-Royce Merlin
The Rolls-Royce Merlin is a British liquid-cooled V12 piston aero engine renowned for powering iconic World War II aircraft such as the Spitfire, Hurricane, and Lancaster.
D. Rolls-Royce Griffon
The Rolls-Royce Griffon is a powerful British liquid-cooled V12 aero engine developed during World War II, best known for powering later, high-performance variants of the Supermarine Spitfire and other Royal Air Force aircraft.
E. Wright R-3350 Duplex-Cyclone radial engine
The Wright R-3350 Duplex-Cyclone is a powerful American 18-cylinder air-cooled radial aircraft engine widely used in World War II and early postwar bombers and airliners.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	aircraft engine ⓘ air‑cooled engine ⓘ radial engine ⓘ
bore	146 mm ⓘ
configuration	single‑row radial ⓘ
coolingSystem	air‑cooled ⓘ
countryOfOrigin	United Kingdom ⓘ
designer	Roy Fedden ⓘ
developedFrom	Bristol Jupiter ⓘ
displacement	28.7 L ⓘ
era	World War II ⓘ interwar period ⓘ
firstRunDate	1930s ⓘ
fuelType	aviation gasoline ⓘ
manufacturer	Bristol Aeroplane Company ⓘ
notableFeature	reliable operation on long‑range flights ⓘ widespread export use ⓘ
notableUse	long‑range record flights in the 1930s ⓘ
numberOfCylinders	9 ⓘ
powerOutputRange	500–1,000 hp class ⓘ
productionStatus	out of production ⓘ
stroke	190 mm ⓘ
successor	Bristol Hercules ⓘ
supercharger	single‑stage supercharger ⓘ
usedBy	Polish Air Force ⓘ Royal Air Force ⓘ various export customers ⓘ
usedFor	airliners ⓘ bombers ⓘ flying boats ⓘ transport aircraft ⓘ
usedInAircraft	Bristol Bombay ⓘ Fairey Swordfish (Pegasus‑powered variants) ⓘ linked to: Fairey Swordfish Fokker T.VIII (some variants) ⓘ linked to: Fokker T.VIII Handley Page Hampden (early variants and trials) ⓘ linked to: Handley Page Hampden PZL.23 Karaś ⓘ PZL.24 ⓘ PZL.37 Łoś ⓘ PZL.43 ⓘ linked to: PZL.23 Karaś PZL.49 Miś (projected) ⓘ Savoia‑Marchetti SM.95 (Pegasus‑powered versions) ⓘ Short Empire flying boats (some variants) ⓘ linked to: Short Empire flying boat Short Sunderland (early prototypes and variants) ⓘ linked to: Short Sunderland Mk I Vickers Valentia (re‑engined variants) ⓘ Vickers Wellesley (some variants) ⓘ linked to: Vickers Wellesley bomber Vickers Wellington ⓘ
usedInConflict	Spanish Civil War (via export aircraft) ⓘ linked to: Spanish Civil War World War II ⓘ
valvetrain	sleeve‑valve precursor poppet‑valve design ⓘ

How these facts were elicited

Referenced by (14)

Full triples — surface form annotated when it differs from this entity's canonical label.

Vickers Wellington → powerplant → Bristol Pegasus radial engine ⓘ

Supermarine Walrus → powerplant → Bristol Pegasus radial engine ⓘ

Roy Fedden → workedOn → Bristol Pegasus engine ⓘ