Piasecki H-21 Shawnee (re‑engined variants)
E909195
The Piasecki H-21 Shawnee (re‑engined variants) are upgraded versions of the tandem-rotor utility helicopter that were refitted with more powerful turboshaft engines to improve performance and reliability over the original piston-powered models.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Piasecki H-21 Shawnee | 2 |
| Piasecki H-21 Shawnee (re‑engined variants) canonical | 1 |
| re‑engined Piasecki H-21 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11160322 — 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: Piasecki H-21 Shawnee (re‑engined variants) Context triple: [Lycoming T53, usedIn, Piasecki H-21 Shawnee (re‑engined variants)]
-
A.
Sikorsky S-58
The Sikorsky S-58 is an American multi-purpose, medium-lift helicopter widely used from the 1950s onward for both civilian and military roles, including transport, search and rescue, and anti-submarine warfare.
-
B.
Bell 205
The Bell 205 is a medium utility helicopter, derived from the iconic UH-1 "Huey," widely used around the world for military, transport, and search-and-rescue roles.
-
C.
Sikorsky V
Sikorsky V is a designated satellite crater on the Moon associated with the larger Sikorsky impact crater.
-
D.
Sikorsky X
Sikorsky X is a designated satellite impact crater located on the Moon near the main Sikorsky crater.
-
E.
Bell 429
The Bell 429 is a light twin-engine helicopter widely used for corporate transport, emergency medical services, and law enforcement due to its advanced avionics, spacious cabin, and performance.
- 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: Piasecki H-21 Shawnee (re‑engined variants) Target entity description: The Piasecki H-21 Shawnee (re‑engined variants) are upgraded versions of the tandem-rotor utility helicopter that were refitted with more powerful turboshaft engines to improve performance and reliability over the original piston-powered models.
-
A.
Sikorsky S-58
The Sikorsky S-58 is an American multi-purpose, medium-lift helicopter widely used from the 1950s onward for both civilian and military roles, including transport, search and rescue, and anti-submarine warfare.
-
B.
Bell 205
The Bell 205 is a medium utility helicopter, derived from the iconic UH-1 "Huey," widely used around the world for military, transport, and search-and-rescue roles.
-
C.
Sikorsky V
Sikorsky V is a designated satellite crater on the Moon associated with the larger Sikorsky impact crater.
-
D.
Sikorsky X
Sikorsky X is a designated satellite impact crater located on the Moon near the main Sikorsky crater.
-
E.
Bell 429
The Bell 429 is a light twin-engine helicopter widely used for corporate transport, emergency medical services, and law enforcement due to its advanced avionics, spacious cabin, and performance.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
helicopter variant
ⓘ
military helicopter variant ⓘ utility helicopter variant ⓘ |
| basedOn |
Piasecki H-21 Shawnee
ⓘ
linked to:
Piasecki H-21 Shawnee (re‑engined variants)
|
| designedTo |
improve performance over original H-21 models
ⓘ
improve reliability over original H-21 models ⓘ |
| developedFrom | piston‑engined H-21 variants ⓘ |
| hasAlternativeName |
re‑engined Piasecki H-21
ⓘ
linked to:
Piasecki H-21 Shawnee (re‑engined variants)
|
| hasConfiguration | twin‑rotor helicopter ⓘ |
| hasEngineType | turboshaft engine ⓘ |
| hasImproved |
climb performance compared to original H-21
ⓘ
hot-and-high performance compared to original H-21 ⓘ overall reliability compared to original H-21 ⓘ payload capability compared to original H-21 ⓘ |
| hasManufacturer | Piasecki Helicopter Corporation ⓘ |
| hasPowerplantUpgrade | more powerful turboshaft engines ⓘ |
| hasPrimaryUser | military operators of Piasecki H-21 ⓘ |
| hasPurpose | extend service life of existing H-21 fleet ⓘ |
| hasRole |
cargo transport
ⓘ
troop transport ⓘ utility transport ⓘ |
| hasRotorConfiguration | tandem rotor ⓘ |
| hasUpgradeType | re‑engining program ⓘ |
| replacesEngineType | radial piston engine ⓘ |
| sharesAirframeWith |
Piasecki H-21 Shawnee
ⓘ
linked to:
Piasecki H-21 Shawnee (re‑engined variants)
|
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: Piasecki H-21 Shawnee (re‑engined variants) Description of subject: The Piasecki H-21 Shawnee (re‑engined variants) are upgraded versions of the tandem-rotor utility helicopter that were refitted with more powerful turboshaft engines to improve performance and reliability over the original piston-powered models.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Piasecki H-21 Shawnee (re‑engined variants)
linked to: Piasecki H-21 Shawnee (re‑engined variants)
linked to: Piasecki H-21 Shawnee (re‑engined variants)