Pratt & Whitney R-4360 Wasp Major
E502756
The Pratt & Whitney R-4360 Wasp Major is a massive 28-cylinder, four-row air-cooled radial piston aircraft engine that powered some of the largest and last-generation propeller-driven military aircraft of the mid-20th century.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pratt & Whitney R-4360 Wasp Major canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T5217865 — 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: Pratt & Whitney R-4360 Wasp Major Context triple: [B-50 Superfortress, engineType, Pratt & Whitney R-4360 Wasp Major]
-
A.
Pratt & Whitney R-2800 Double Wasp
The Pratt & Whitney R-2800 Double Wasp is a powerful American 18-cylinder air-cooled radial aircraft engine widely used in World War II fighters and bombers.
-
B.
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.
-
C.
Pratt & Whitney R-2000 Twin Wasp
The Pratt & Whitney R-2000 Twin Wasp is a 14-cylinder, air-cooled radial aircraft engine developed in the 1940s and widely used in medium and large transport aircraft of the era.
-
D.
Pratt & Whitney R-985 Wasp Junior
The Pratt & Whitney R-985 Wasp Junior is a nine-cylinder, air-cooled radial aircraft engine widely used in the 1930s–1950s to power light transports, trainers, and utility aircraft.
-
E.
Wright R-2600 Twin Cyclone
The Wright R-2600 Twin Cyclone is a World War II–era American 14-cylinder, air-cooled radial aircraft engine widely used in medium bombers and naval 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: Pratt & Whitney R-4360 Wasp Major Target entity description: The Pratt & Whitney R-4360 Wasp Major is a massive 28-cylinder, four-row air-cooled radial piston aircraft engine that powered some of the largest and last-generation propeller-driven military aircraft of the mid-20th century.
-
A.
Pratt & Whitney R-2800 Double Wasp
The Pratt & Whitney R-2800 Double Wasp is a powerful American 18-cylinder air-cooled radial aircraft engine widely used in World War II fighters and bombers.
-
B.
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.
-
C.
Pratt & Whitney R-2000 Twin Wasp
The Pratt & Whitney R-2000 Twin Wasp is a 14-cylinder, air-cooled radial aircraft engine developed in the 1940s and widely used in medium and large transport aircraft of the era.
-
D.
Pratt & Whitney R-985 Wasp Junior
The Pratt & Whitney R-985 Wasp Junior is a nine-cylinder, air-cooled radial aircraft engine widely used in the 1930s–1950s to power light transports, trainers, and utility aircraft.
-
E.
Wright R-2600 Twin Cyclone
The Wright R-2600 Twin Cyclone is a World War II–era American 14-cylinder, air-cooled radial aircraft engine widely used in medium bombers and naval aircraft.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | aircraft piston engine ⓘ |
| application |
large airliners
ⓘ
large long-range bombers ⓘ military transports ⓘ |
| bore | 5.75 inches ⓘ |
| compressionRatio | approximately 6.7:1 in typical variants ⓘ |
| configuration | radial ⓘ |
| coolingSystem | air-cooled ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | four-row ⓘ |
| designGoal | high power for large, long-range aircraft ⓘ |
| displacement |
4,362 cubic inches
ⓘ
approximately 71.5 liters ⓘ |
| driveType | geared propeller drive ⓘ |
| era | World War II and early Cold War ⓘ |
| eraRole | powerplant for last-generation large propeller-driven military aircraft ⓘ |
| family | Pratt & Whitney Wasp series NERFINISHED ⓘ |
| firstRun | 1944 ⓘ |
| fuelType | avgas ⓘ |
| ignitionSystem | dual ignition ⓘ |
| manufacturer | Pratt & Whitney NERFINISHED ⓘ |
| NATOReportingName | Wasp Major NERFINISHED ⓘ |
| notableCharacteristic |
among the last large piston engines before widespread adoption of turbojets
ⓘ
one of the most powerful piston aircraft engines mass-produced ⓘ |
| numberOfCylinders | 28 ⓘ |
| powerOutput |
approximately 3,000 horsepower in early versions
ⓘ
up to about 3,800 horsepower in later versions ⓘ |
| productionPeriod | mid-1940s to early 1950s ⓘ |
| service |
United States Air Force
NERFINISHED
ⓘ
United States Navy NERFINISHED ⓘ |
| stroke | 6.0 inches ⓘ |
| supercharging | geared centrifugal supercharger ⓘ |
| typicalPropeller | four-bladed constant-speed propeller ⓘ |
| usedInAircraft |
Boeing 377 Stratocruiser
NERFINISHED
ⓘ
Boeing B-50 Superfortress NERFINISHED ⓘ Boeing C-97 Stratofreighter NERFINISHED ⓘ Boeing KC-97 Stratofreighter NERFINISHED ⓘ Convair B-36 Peacemaker NERFINISHED ⓘ Douglas C-124 Globemaster II NERFINISHED ⓘ Fairchild C-119 Flying Boxcar NERFINISHED ⓘ Martin JRM Mars NERFINISHED ⓘ Northrop XB-35 NERFINISHED ⓘ Northrop YB-49 NERFINISHED ⓘ Republic XF-12 Rainbow NERFINISHED ⓘ |
| valvetrain | overhead poppet valves ⓘ |
| weightClass | very large radial engine ⓘ |
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: Pratt & Whitney R-4360 Wasp Major Description of subject: The Pratt & Whitney R-4360 Wasp Major is a massive 28-cylinder, four-row air-cooled radial piston aircraft engine that powered some of the largest and last-generation propeller-driven military aircraft of the mid-20th century.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Boeing C-97 Stratofreighter