Pratt & Whitney R-985 Wasp Junior
E287707
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pratt & Whitney R-985 Wasp Junior canonical | 1 |
| Pratt & Whitney R‑985 Wasp Junior | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2675452 — 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-985 Wasp Junior Context triple: [Beechcraft C-45 Expeditor, engineType, Pratt & Whitney R-985 Wasp Junior]
-
A.
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.
-
B.
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.
-
C.
Pratt & Whitney R-1830 Twin Wasp radial engine
The Pratt & Whitney R-1830 Twin Wasp is a widely used American 14-cylinder air-cooled radial aircraft engine of the World War II era, powering numerous fighters, bombers, and transport aircraft.
-
D.
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.
-
E.
Rolls-Royce Turbomeca RTM322
The Rolls-Royce Turbomeca RTM322 is a turboshaft aircraft engine developed for medium-lift military helicopters, notably powering types such as the NH90 and Apache.
- 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-985 Wasp Junior Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
Pratt & Whitney R-1830 Twin Wasp radial engine
The Pratt & Whitney R-1830 Twin Wasp is a widely used American 14-cylinder air-cooled radial aircraft engine of the World War II era, powering numerous fighters, bombers, and transport aircraft.
-
D.
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.
-
E.
Rolls-Royce Turbomeca RTM322
The Rolls-Royce Turbomeca RTM322 is a turboshaft aircraft engine developed for medium-lift military helicopters, notably powering types such as the NH90 and Apache.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
aircraft engine
ⓘ
piston engine ⓘ radial engine ⓘ |
| application |
light transport aircraft
ⓘ
trainer aircraft ⓘ utility aircraft ⓘ |
| bore | 5.1875 in ⓘ |
| configurationDetail | single-row radial ⓘ |
| coolingMethod | air-cooled ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | radial ⓘ |
| displacement |
16.1 L
ⓘ
985 in³ ⓘ |
| era |
1930s
ⓘ
1940s ⓘ 1950s ⓘ |
| family |
Pratt & Whitney Wasp series
ⓘ
surface form:
Pratt & Whitney Wasp Junior family
|
| firstRun | mid-1930s ⓘ |
| fuelType | avgas ⓘ |
| ignition | dual magnetos ⓘ |
| manufacturer | Pratt & Whitney ⓘ |
| notableCharacteristic |
reliability
ⓘ
widespread postwar civilian use ⓘ |
| notableUse |
bush flying operations
ⓘ
floatplane operations ⓘ |
| numberOfCylinders | 9 ⓘ |
| powerOutput |
approximately 300–450 hp range
ⓘ
approximately 450 hp ⓘ |
| productionPeriod | 1930s–1950s ⓘ |
| stroke | 5.75 in ⓘ |
| supercharging | single-stage supercharger ⓘ |
| usedBy |
civil aviation operators
ⓘ
military air forces (trainers and utility types) ⓘ |
| usedIn |
Air tractors and agricultural conversions (various)
ⓘ
Beechcraft Model 17 Staggerwing (some variants) ⓘ Beechcraft C-45 Expeditor ⓘ
surface form:
Beechcraft Model 18
Canadian Car and Foundry ⓘ
surface form:
Canadian Car & Foundry Harvard (some trainers / variants)
Cessna T-50 Bobcat (some variants) ⓘ Fairchild 24 (some variants) ⓘ Grumman Goose ⓘ
surface form:
Grumman G-21 Goose (some variants)
Howard DGA-15 (some variants) ⓘ Lockheed Model 10 Electra ⓘ
surface form:
Lockheed Model 10 Electra (some variants)
Noorduyn Norseman (some variants) ⓘ Spartan Executive (some variants) ⓘ Vultee BT-13 Valiant ⓘ
surface form:
Vultee BT-13 (some variants / trainers)
Waco cabin biplanes (some variants) ⓘ de Havilland Canada DHC-2 Beaver ⓘ de Havilland Canada DHC-3 Otter ⓘ
surface form:
de Havilland Canada DHC-3 Otter (early versions / some variants)
|
| valvetrain | overhead 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: Pratt & Whitney R-985 Wasp Junior Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Pratt & Whitney Wasp
this entity surface form:
Pratt & Whitney R‑985 Wasp Junior