Allison J33 turbojet
E945331
The Allison J33 turbojet is an early American axial-flow jet engine widely used in the first generation of U.S. jet aircraft during and after World War II.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Allison J33 engine | 1 |
| Allison J33 turbojet canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11750235 — 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: Allison J33 turbojet Context triple: [T-33 Shooting Star, powerplant, Allison J33 turbojet]
-
A.
Allison J35 turbojet
The Allison J35 turbojet was an early American axial-flow jet engine widely used in the late 1940s and 1950s to power several pioneering military aircraft.
-
B.
Pratt & Whitney J42
The Pratt & Whitney J42 was an early American turbojet engine, produced under license from the British Rolls-Royce Nene and used to power several post–World War II U.S. Navy fighter aircraft.
-
C.
Pratt & Whitney J57
The Pratt & Whitney J57 is a pioneering American axial-flow turbojet engine widely used in early Cold War military aircraft and notable as one of the first jet engines to produce over 10,000 pounds of thrust.
-
D.
Pratt & Whitney JT3D
The Pratt & Whitney JT3D is an early low-bypass turbofan jet engine widely used on first-generation jet airliners such as the Boeing 707 and Douglas DC-8.
-
E.
Pratt & Whitney JT3C
The Pratt & Whitney JT3C is an early American turbojet engine that powered first-generation jet airliners and military aircraft in the late 1950s and early 1960s.
- 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: Allison J33 turbojet Target entity description: The Allison J33 turbojet is an early American axial-flow jet engine widely used in the first generation of U.S. jet aircraft during and after World War II.
-
A.
Allison J35 turbojet
The Allison J35 turbojet was an early American axial-flow jet engine widely used in the late 1940s and 1950s to power several pioneering military aircraft.
-
B.
Pratt & Whitney J42
The Pratt & Whitney J42 was an early American turbojet engine, produced under license from the British Rolls-Royce Nene and used to power several post–World War II U.S. Navy fighter aircraft.
-
C.
Pratt & Whitney J57
The Pratt & Whitney J57 is a pioneering American axial-flow turbojet engine widely used in early Cold War military aircraft and notable as one of the first jet engines to produce over 10,000 pounds of thrust.
-
D.
Pratt & Whitney JT3D
The Pratt & Whitney JT3D is an early low-bypass turbofan jet engine widely used on first-generation jet airliners such as the Boeing 707 and Douglas DC-8.
-
E.
Pratt & Whitney JT3C
The Pratt & Whitney JT3C is an early American turbojet engine that powered first-generation jet airliners and military aircraft in the late 1950s and early 1960s.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
axial-flow jet engine
ⓘ
turbojet engine ⓘ |
| application |
fighter aircraft
ⓘ
research aircraft ⓘ trainer aircraft ⓘ |
| basedOn | General Electric I-40 NERFINISHED ⓘ |
| combustorType | can-annular combustors ⓘ |
| companyDesignation | Allison J33-A series NERFINISHED ⓘ |
| compressorStages | 11 ⓘ |
| compressorType | axial-flow compressor ⓘ |
| configuration | single-spool axial-flow ⓘ |
| coolingMethod | air-cooled turbine ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| developedBy | Allison Engine Company NERFINISHED ⓘ |
| developedFrom | General Electric I-40 NERFINISHED ⓘ |
| enteredService | 1944 ⓘ |
| era | first generation jet engine ⓘ |
| firstRunDate | 1942 ⓘ |
| fuelType | aviation kerosene ⓘ |
| historicalSignificance | enabled rapid transition of U.S. fighter forces to jet propulsion ⓘ |
| manufacturer | Allison Engine Company NERFINISHED ⓘ |
| militaryDesignation | J33 ⓘ |
| notableFeature | one of the first widely produced American axial-flow turbojets ⓘ |
| notableVariant |
J33-A-23
ⓘ
J33-A-35 ⓘ J33-A-35A ⓘ J33-A-41 ⓘ |
| role | primary powerplant for first-generation U.S. jet fighters ⓘ |
| status |
out of production
ⓘ
retired from frontline service ⓘ |
| successor |
Allison J35
NERFINISHED
ⓘ
Allison J71 NERFINISHED ⓘ |
| thrustClass |
18–22 kN
ⓘ
4000–5000 lbf ⓘ |
| turbineStages | 2 ⓘ |
| usedBy |
United States Air Force
ⓘ
United States Army Air Forces NERFINISHED ⓘ United States Navy ⓘ multiple foreign air forces via Lend-Lease or surplus ⓘ |
| usedInAircraft |
Bell XP-83 (prototype)
NERFINISHED
ⓘ
Lockheed F-80 Shooting Star NERFINISHED ⓘ Lockheed F-94 Starfire NERFINISHED ⓘ Lockheed P-80 Shooting Star NERFINISHED ⓘ Lockheed T-33 Shooting Star NERFINISHED ⓘ McDonnell F2H Banshee (early prototypes) NERFINISHED ⓘ McDonnell FH Phantom NERFINISHED ⓘ Northrop XP-89 (early prototypes) NERFINISHED ⓘ Republic XF-84E (prototype) NERFINISHED ⓘ experimental and testbed aircraft ⓘ |
| usedInConflict | World War II ⓘ |
| usedInEra | early Cold War ⓘ |
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: Allison J33 turbojet Description of subject: The Allison J33 turbojet is an early American axial-flow jet engine widely used in the first generation of U.S. jet aircraft during and after World War II.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Allison J33 engine