Pratt & Whitney J58
E259605
The Pratt & Whitney J58 is a high-performance turbojet/ramjet hybrid engine developed for sustained high-speed, high-altitude flight, most famously powering the SR-71 Blackbird reconnaissance aircraft.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Pratt & Whitney J58 canonical | 6 |
| Pratt & Whitney J58 (on most variants) | 1 |
| Pratt & Whitney J58 turbojet | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1994770 — 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 J58 Context triple: [SR-71 Blackbird, engineType, Pratt & Whitney J58]
-
A.
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.
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B.
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.
-
C.
Pratt & Whitney F100 turbofan
The Pratt & Whitney F100 is an afterburning turbofan jet engine widely used in modern U.S. fighter aircraft, known for its high thrust-to-weight ratio and advanced performance.
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D.
Pratt & Whitney JT9D
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.
-
E.
Pratt & Whitney JT8D
The Pratt & Whitney JT8D is a low-bypass turbofan jet engine widely used on early short- to medium-range airliners and known for powering many classic narrow-body aircraft of the 1960s–1980s.
- 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 J58 Target entity description: The Pratt & Whitney J58 is a high-performance turbojet/ramjet hybrid engine developed for sustained high-speed, high-altitude flight, most famously powering the SR-71 Blackbird reconnaissance aircraft.
-
A.
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.
-
B.
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.
-
C.
Pratt & Whitney F100 turbofan
The Pratt & Whitney F100 is an afterburning turbofan jet engine widely used in modern U.S. fighter aircraft, known for its high thrust-to-weight ratio and advanced performance.
-
D.
Pratt & Whitney JT9D
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.
-
E.
Pratt & Whitney JT8D
The Pratt & Whitney JT8D is a low-bypass turbofan jet engine widely used on early short- to medium-range airliners and known for powering many classic narrow-body aircraft of the 1960s–1980s.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
afterburning turbojet
ⓘ
turbojet engine ⓘ turboramjet ⓘ |
| applicationRole | strategic reconnaissance ⓘ |
| bypassRatio | very low ⓘ |
| compressorType | axial compressor ⓘ |
| controlSystem | hydromechanical ⓘ |
| coolingMethod | fuel-cooled ⓘ |
| coolingUseOfFuel |
airframe heat sink
ⓘ
hydraulic fluid cooling ⓘ lubricant cooling ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designedForAltitude | high altitude ⓘ |
| designedForSpeed | sustained Mach 3+ ⓘ |
| designGoal | continuous operation at extreme skin temperatures ⓘ |
| developedFor |
Lockheed A-12
ⓘ
Lockheed SR-71 Blackbird ⓘ
linked to:
SR-71 Blackbird
Lockheed YF-12 ⓘ |
| engineConfiguration | axial-flow ⓘ |
| exhaustGasTemperature | very high ⓘ |
| exhaustSystem | variable-area nozzle ⓘ |
| firstRunDate | late 1950s ⓘ |
| fuelType | JP-7 ⓘ |
| hasAfterburner | yes ⓘ |
| intakeIntegration | spike-controlled inlet system on SR-71 ⓘ |
| manufacturer | Pratt & Whitney ⓘ |
| NATOReportingName | JT11D-20 ⓘ |
| notableFeature |
acts as a turboramjet at high speed
ⓘ
bleed-bypass system routes air around core at high Mach ⓘ designed for sustained Mach 3+ flight ⓘ extensive use of high-temperature materials ⓘ fixed-geometry inlet compatibility ⓘ |
| notableRecord | enabled SR-71 world speed and altitude records ⓘ |
| numberOfCompressorStages | 9 ⓘ |
| numberOfEnginesPerSR71 | 2 ⓘ |
| numberOfTurbineStages | 2 ⓘ |
| operatingRegime | subsonic to high-supersonic ⓘ |
| primaryUser | United States Air Force ⓘ |
| serviceEntry | early 1960s ⓘ |
| status | retired ⓘ |
| thrustDry | approximately 32,500 lbf ⓘ |
| thrustWithAfterburner |
approximately 145 kN
ⓘ
approximately 34,000 lbf ⓘ |
| turbineType | axial turbine ⓘ |
| usedInAircraft |
Lockheed A-12
ⓘ
Lockheed SR-71 Blackbird ⓘ
linked to:
SR-71 Blackbird
Lockheed YF-12 ⓘ |
| usedOnProgram |
CIA Oxcart program
ⓘ
linked to:
Lockheed A-12 program
USAF SR-71 program ⓘ
linked to:
SR-71 Blackbird
|
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 J58 Description of subject: The Pratt & Whitney J58 is a high-performance turbojet/ramjet hybrid engine developed for sustained high-speed, high-altitude flight, most famously powering the SR-71 Blackbird reconnaissance aircraft.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Pratt & Whitney J58
linked to: Pratt & Whitney J58