Wright R-3350 Duplex-Cyclone radial engine
E100022
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Wright R-3350 Duplex-Cyclone | 3 |
| Wright R-3350 Duplex-Cyclone radial engine canonical | 2 |
| Wright Cyclone engine family | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T830677 — 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: Wright R-3350 Duplex-Cyclone radial engine Context triple: [B-29 Superfortress, engineType, Wright R-3350 Duplex-Cyclone 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 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.
-
C.
Nakajima Sakae radial engine
The Nakajima Sakae radial engine was a widely used Japanese air-cooled aircraft engine of World War II, best known for powering frontline Imperial Japanese Navy and Army fighters and bombers such as the Mitsubishi A6M Zero.
-
D.
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.
-
E.
Rolls-Royce Pegasus turbofan
The Rolls-Royce Pegasus turbofan is a unique vectored-thrust jet engine that enables vertical and short takeoff and landing (V/STOL) capability in aircraft such as the Harrier family.
- 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: Wright R-3350 Duplex-Cyclone radial engine Target entity description: 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.
-
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 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.
-
C.
Nakajima Sakae radial engine
The Nakajima Sakae radial engine was a widely used Japanese air-cooled aircraft engine of World War II, best known for powering frontline Imperial Japanese Navy and Army fighters and bombers such as the Mitsubishi A6M Zero.
-
D.
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.
-
E.
Rolls-Royce Pegasus turbofan
The Rolls-Royce Pegasus turbofan is a unique vectored-thrust jet engine that enables vertical and short takeoff and landing (V/STOL) capability in aircraft such as the Harrier family.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
aircraft engine
ⓘ
piston engine ⓘ radial engine ⓘ |
| bore | 6.125 inches ⓘ |
| configuration | 18-cylinder radial ⓘ |
| coolingSystem | air-cooled ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| cylinderCount | 18 ⓘ |
| cylinderRows | two rows ⓘ |
| designFeature |
forged aluminum alloy pistons
ⓘ
pressure carburetion on early models ⓘ two-row 9-cylinder banks ⓘ |
| displacement |
3350 cubic inches
ⓘ
about 54.9 liters ⓘ |
| driveType | direct-drive ⓘ |
| enteredService | early 1940s ⓘ |
| era |
World War II
ⓘ
early Cold War ⓘ |
| family |
Wright Cyclone engine family
ⓘ
linked to:
Wright R-3350 Duplex-Cyclone radial engine
|
| firstRun | 1940 ⓘ |
| fuelType | aviation gasoline ⓘ |
| ignitionSystem | dual ignition ⓘ |
| laterVariantFeature | turbo-compound power-recovery turbines ⓘ |
| laterVariantRole | long-range transoceanic airliner engine ⓘ |
| manufacturer |
Wright Aeronautical
ⓘ
linked to:
Wright Aeronautical Corporation
|
| notableApplication |
Boeing B-29 Superfortress
ⓘ
linked to:
B-29 Superfortress
Boeing B-50 Superfortress ⓘ
linked to:
B-50 Superfortress
Canadair CP-107 Argus ⓘ Douglas A-1 Skyraider ⓘ Douglas DC-7 ⓘ Fairchild C-119 Flying Boxcar ⓘ Lockheed Constellation ⓘ
linked to:
Lockheed C‑69 Constellation
Lockheed L-1049 Super Constellation ⓘ
linked to:
Lockheed C‑69 Constellation
Lockheed L-1649 Starliner ⓘ Lockheed Super Constellation ⓘ
linked to:
Lockheed C‑69 Constellation
|
| notableIssue | early overheating problems in B-29 service ⓘ |
| powerOutput | roughly 2,200 to over 3,700 horsepower depending on variant ⓘ |
| primaryRole | bomber powerplant ⓘ |
| productionPeriod |
1940s
ⓘ
1950s ⓘ early 1960s ⓘ |
| secondaryRole | airliner powerplant ⓘ |
| stroke | 6.3125 inches ⓘ |
| successorUsage | superseded by early turbojet and turboprop engines in mainline service ⓘ |
| supercharging |
single-stage supercharger
ⓘ
turbo-supercharger on some variants ⓘ |
| usedInConflict |
Korean War
ⓘ
World War II ⓘ |
| valveType | conventional poppet valves ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Wright R-3350 Duplex-Cyclone radial engine Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Wright R-3350 Duplex-Cyclone radial engine
subject linked to:
Wright R-3350 Duplex-Cyclone radial engine
linked to: Wright R-3350 Duplex-Cyclone radial engine
subject linked to:
Lockheed C‑69 Constellation
linked to: Wright R-3350 Duplex-Cyclone radial engine
linked to: Wright R-3350 Duplex-Cyclone radial engine