Hitachi Ha-42 radial engine
E273325
The Hitachi Ha-42 radial engine was a Japanese air-cooled aircraft piston engine used during World War II to power light aircraft such as liaison and observation planes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Hitachi Ha-42 radial engine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2499756 — 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: Hitachi Ha-42 radial engine Context triple: [Kokusai Ki-76, powerplant, Hitachi Ha-42 radial engine]
-
A.
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.
-
B.
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.
-
C.
Nakajima Ha-45 radial engine
The Nakajima Ha-45 was a powerful Japanese air-cooled radial aircraft engine of World War II, used in several late-war fighters and known for its high output and compact design.
-
D.
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.
-
E.
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.
- 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: Hitachi Ha-42 radial engine Target entity description: The Hitachi Ha-42 radial engine was a Japanese air-cooled aircraft piston engine used during World War II to power light aircraft such as liaison and observation planes.
-
A.
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.
-
B.
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.
-
C.
Nakajima Ha-45 radial engine
The Nakajima Ha-45 was a powerful Japanese air-cooled radial aircraft engine of World War II, used in several late-war fighters and known for its high output and compact design.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (19)
| Predicate | Object |
|---|---|
| instanceOf |
aircraft piston engine
ⓘ
radial engine ⓘ |
| application | aircraft propulsion ⓘ |
| category |
World War II Japanese aircraft engines
ⓘ
radial aircraft engines ⓘ |
| coolingMethod | air-cooled ⓘ |
| countryOfOrigin | Japan ⓘ |
| designedIn | Japan ⓘ |
| engineConfiguration | radial ⓘ |
| era | World War II era ⓘ |
| fuelType | aviation gasoline ⓘ |
| manufacturer | Hitachi ⓘ |
| powerType | internal combustion engine ⓘ |
| usedBy |
Imperial Japanese Army Air Service
ⓘ
Imperial Japanese Navy Air Service ⓘ |
| usedFor |
liaison aircraft
ⓘ
light aircraft ⓘ observation aircraft ⓘ |
| usedInConflict | World War II ⓘ |
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: Hitachi Ha-42 radial engine Description of subject: The Hitachi Ha-42 radial engine was a Japanese air-cooled aircraft piston engine used during World War II to power light aircraft such as liaison and observation planes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.