Nakajima Ha-109 radial engine
E258106
The Nakajima Ha-109 was a Japanese World War II-era air-cooled radial aircraft engine used in high-performance fighter designs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Nakajima Ha-109 radial engine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2359982 — 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: Nakajima Ha-109 radial engine Context triple: [Nakajima Ki-44, powerplant, Nakajima Ha-109 radial engine]
-
A.
Nakajima Ha-25 radial engine
The Nakajima Ha-25 was a Japanese air-cooled radial aircraft engine widely used in World War II fighters, noted for its reliability and compact design.
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B.
Nakajima Ha-1b radial engine
The Nakajima Ha-1b was a Japanese air-cooled radial aircraft engine used in pre–World War II and early-war fighters such as the Nakajima Ki-27.
-
C.
Nakajima Ha-5 radial engine
The Nakajima Ha-5 was a Japanese air-cooled radial aircraft engine of the 1930s, used to power several early World War II Imperial Japanese Army bombers and transports.
-
D.
Mitsubishi Ha-104 radial engine
The Mitsubishi Ha-104 was a Japanese World War II-era twin-row, 18-cylinder air-cooled radial aircraft engine used to power several Imperial Japanese Army bombers and other combat aircraft.
-
E.
Nakajima Sakae radial engine
The Nakajima Sakae radial engine was a widely used Japanese air-cooled aircraft engine of World War II, best known for powering frontline Imperial Japanese Navy and Army fighters and bombers such as the Mitsubishi A6M Zero.
- 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: Nakajima Ha-109 radial engine Target entity description: The Nakajima Ha-109 was a Japanese World War II-era air-cooled radial aircraft engine used in high-performance fighter designs.
-
A.
Nakajima Ha-25 radial engine
The Nakajima Ha-25 was a Japanese air-cooled radial aircraft engine widely used in World War II fighters, noted for its reliability and compact design.
-
B.
Nakajima Ha-1b radial engine
The Nakajima Ha-1b was a Japanese air-cooled radial aircraft engine used in pre–World War II and early-war fighters such as the Nakajima Ki-27.
-
C.
Nakajima Ha-5 radial engine
The Nakajima Ha-5 was a Japanese air-cooled radial aircraft engine of the 1930s, used to power several early World War II Imperial Japanese Army bombers and transports.
-
D.
Mitsubishi Ha-104 radial engine
The Mitsubishi Ha-104 was a Japanese World War II-era twin-row, 18-cylinder air-cooled radial aircraft engine used to power several Imperial Japanese Army bombers and other combat aircraft.
-
E.
Nakajima Sakae radial engine
The Nakajima Sakae radial engine was a widely used Japanese air-cooled aircraft engine of World War II, best known for powering frontline Imperial Japanese Navy and Army fighters and bombers such as the Mitsubishi A6M Zero.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
World War II-era aircraft engine
ⓘ
aircraft engine ⓘ piston engine ⓘ radial engine ⓘ |
| alsoKnownAs | Army Type 2 radial engine ⓘ |
| application | single-seat fighters ⓘ |
| coolingMethod | air-cooled ⓘ |
| countryOfOrigin | Japan ⓘ |
| cylinderArrangement | two-row radial ⓘ |
| designedFor | fighter aircraft ⓘ |
| designGoal |
high power-to-weight ratio
ⓘ
improved high-altitude performance ⓘ |
| engineConfiguration | radial ⓘ |
| engineCycle | four-stroke ⓘ |
| era | 1930s–1940s ⓘ |
| fuelType | aviation gasoline ⓘ |
| historicalPeriod |
Second World War
ⓘ
linked to:
World War II
|
| ignitionSystem | spark-ignition ⓘ |
| manufacturer | Nakajima Aircraft Company ⓘ |
| nationality | Japanese ⓘ |
| numberOfCylinders | 14 ⓘ |
| powerOutputClass | around 1,500 horsepower ⓘ |
| primaryUser | Imperial Japanese Army ⓘ |
| propulsionType | propeller-driven aircraft ⓘ |
| successorTo |
Nakajima Ha-25
ⓘ
linked to:
Nakajima Ha-109
|
| usedBy | Imperial Japanese Army Air Service ⓘ |
| usedInAircraftType |
Nakajima Ki-44 Shoki
ⓘ
linked to:
Nakajima Ki-44
other Japanese fighter prototypes ⓘ |
| usedInConflict | World War II ⓘ |
| usedInRole | high-performance fighter engine ⓘ |
| usedInTheatre | Pacific 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: Nakajima Ha-109 radial engine Description of subject: The Nakajima Ha-109 was a Japanese World War II-era air-cooled radial aircraft engine used in high-performance fighter designs.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.