Pratt & Whitney JT9D
E79017
The Pratt & Whitney JT9D is a high-bypass turbofan jet engine that powered early wide-body airliners and was notably used on the original Boeing 747 series.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Pratt & Whitney JT9D canonical | 7 |
| JT9D | 2 |
| JT9D engine family | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T633226 — 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 JT9D Context triple: [Boeing 747SP, engineModel, Pratt & Whitney JT9D]
-
A.
Pratt & Whitney F117-PW-100
The Pratt & Whitney F117-PW-100 is a high-bypass turbofan jet engine used to power the Boeing C-17 Globemaster III military transport aircraft.
-
B.
Snecma M53
The Snecma M53 is a French afterburning turbofan jet engine developed by Snecma, best known for powering Dassault’s Mirage 2000 fighter aircraft.
-
C.
Eurojet EJ200
The Eurojet EJ200 is a modern afterburning turbofan jet engine developed for high-performance fighter aircraft, most notably powering the Eurofighter Typhoon.
-
D.
Pratt & Whitney
Pratt & Whitney is a major American aerospace manufacturer best known for designing and producing aircraft engines for commercial, military, and general aviation markets.
-
E.
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.
- 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 JT9D Target entity description: The Pratt & Whitney JT9D is a high-bypass turbofan jet engine that powered early wide-body airliners and was notably used on the original Boeing 747 series.
-
A.
Pratt & Whitney F117-PW-100
The Pratt & Whitney F117-PW-100 is a high-bypass turbofan jet engine used to power the Boeing C-17 Globemaster III military transport aircraft.
-
B.
Snecma M53
The Snecma M53 is a French afterburning turbofan jet engine developed by Snecma, best known for powering Dassault’s Mirage 2000 fighter aircraft.
-
C.
Eurojet EJ200
The Eurojet EJ200 is a modern afterburning turbofan jet engine developed for high-performance fighter aircraft, most notably powering the Eurofighter Typhoon.
-
D.
Pratt & Whitney
Pratt & Whitney is a major American aerospace manufacturer best known for designing and producing aircraft engines for commercial, military, and general aviation markets.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
high-bypass turbofan
ⓘ
turbofan engine ⓘ |
| application | wide-body airliners ⓘ |
| bypassRatio | approximately 5:1 ⓘ |
| compressorType | axial-flow ⓘ |
| configuration | twin-spool ⓘ |
| coolingTechnology | air-cooled turbine blades ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| enteredService | 1970 ⓘ |
| era | first generation high-bypass turbofan ⓘ |
| family |
JT9D engine family
ⓘ
linked to:
Pratt & Whitney JT9D
|
| fanStages | 1 ⓘ |
| firstRun | 1966 ⓘ |
| firstServiceAircraft |
Boeing 747-100
ⓘ
linked to:
Boeing 747
|
| fuelType | Jet A kerosene ⓘ |
| highPressureCompressorStages | 11 ⓘ |
| ICAOEngineCode |
JT9D
ⓘ
linked to:
Pratt & Whitney JT9D
|
| improvement | upgraded variants with increased thrust and reliability ⓘ |
| lowPressureCompressorStages | 3 ⓘ |
| manufacturer | Pratt & Whitney ⓘ |
| marketRole | primary powerplant for early Boeing 747 variants ⓘ |
| mounting | underwing podded installation ⓘ |
| notableFeature |
first high-bypass turbofan used on a wide-body airliner
ⓘ
pioneered high-bypass engines for long-haul jets ⓘ |
| notableIssue | early fan blade and turbine durability problems on 747 ⓘ |
| primaryUse |
cargo transport on wide-body freighters
ⓘ
long-haul passenger transport ⓘ |
| role | civil transport engine ⓘ |
| status | out of production ⓘ |
| successor | Pratt & Whitney PW4000 ⓘ |
| thrustRange | 40,000–53,000 lbf ⓘ |
| turbineStagesHighPressure | 2 ⓘ |
| turbineStagesLowPressure | 4 ⓘ |
| usedBy | commercial airlines worldwide ⓘ |
| usedOnAircraft |
Airbus A300
ⓘ
Airbus A310 ⓘ Boeing 747 ⓘ Boeing 747-100 ⓘ
linked to:
Boeing 747
Boeing 747-200 ⓘ
linked to:
Boeing 747
Boeing 747-300 ⓘ
linked to:
Boeing 747
Boeing 747SP ⓘ Boeing 747SR ⓘ
linked to:
Boeing 747
Boeing 767-200 ⓘ
linked to:
Boeing 767
Boeing 767-300 ⓘ
linked to:
Boeing 767
Ilyushin Il-86 ⓘ Kawasaki C-1 (modified testbed) ⓘ
linked to:
Kawasaki C-1
McDonnell Douglas DC-10 ⓘ |
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 JT9D Description of subject: The Pratt & Whitney JT9D is a high-bypass turbofan jet engine that powered early wide-body airliners and was notably used on the original Boeing 747 series.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Pratt & Whitney JT9D
linked to: Pratt & Whitney JT9D
linked to: Pratt & Whitney JT9D