Bell YOH-4
E687573
The Bell YOH-4 was a light observation helicopter prototype developed for the U.S. Army in the 1960s that served as the basis for the later Bell 206 JetRanger series.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Bell YOH-4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7769783 — 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: Bell YOH-4 Context triple: [Bell 206, developedFrom, Bell YOH-4]
-
A.
OH-6 Cayuse
The OH-6 Cayuse is a light observation and utility helicopter originally developed for the U.S. Army, known for its agility, compact size, and extensive use in reconnaissance and special operations roles.
-
B.
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.
-
C.
Bell 204
The Bell 204 is an early American utility helicopter design by Bell Helicopter that served as the basis for the famous UH-1 "Huey" series.
-
D.
OH-1 reconnaissance helicopter
The OH-1 reconnaissance helicopter is a Japanese twin-engine observation and light attack rotorcraft developed by Kawasaki for the Japan Ground Self-Defense Force, featuring advanced sensors and high maneuverability for battlefield surveillance.
-
E.
HH-60 Pave Hawk
The HH-60 Pave Hawk is a U.S. Air Force combat search-and-rescue helicopter, derived from the UH-60 Black Hawk and equipped for all-weather, long-range missions to recover personnel from hostile environments.
- 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: Bell YOH-4 Target entity description: The Bell YOH-4 was a light observation helicopter prototype developed for the U.S. Army in the 1960s that served as the basis for the later Bell 206 JetRanger series.
-
A.
OH-6 Cayuse
The OH-6 Cayuse is a light observation and utility helicopter originally developed for the U.S. Army, known for its agility, compact size, and extensive use in reconnaissance and special operations roles.
-
B.
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.
-
C.
Bell 204
The Bell 204 is an early American utility helicopter design by Bell Helicopter that served as the basis for the famous UH-1 "Huey" series.
-
D.
OH-1 reconnaissance helicopter
The OH-1 reconnaissance helicopter is a Japanese twin-engine observation and light attack rotorcraft developed by Kawasaki for the Japan Ground Self-Defense Force, featuring advanced sensors and high maneuverability for battlefield surveillance.
-
E.
HH-60 Pave Hawk
The HH-60 Pave Hawk is a U.S. Air Force combat search-and-rescue helicopter, derived from the UH-60 Black Hawk and equipped for all-weather, long-range missions to recover personnel from hostile environments.
- F. None of above. chosen
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf |
light observation helicopter
ⓘ
prototype helicopter ⓘ |
| basedOn | Bell D-250 design study ⓘ |
| basisFor | Bell 206 JetRanger NERFINISHED ⓘ |
| capacity | pilot and observer ⓘ |
| category |
1960s United States military utility aircraft
ⓘ
helicopters of the United States ⓘ |
| competedWith |
Fairchild-Hiller YOH-5
NERFINISHED
ⓘ
Hughes YOH-6 NERFINISHED ⓘ |
| competition | U.S. Army Light Observation Helicopter (LOH) program NERFINISHED ⓘ |
| configuration |
single main rotor
ⓘ
tail rotor ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | 2 ⓘ |
| designation | YOH-4A NERFINISHED ⓘ |
| developedFor | United States Army NERFINISHED ⓘ |
| developedIn | 1960s ⓘ |
| developedInto | Bell 206A JetRanger NERFINISHED ⓘ |
| engineType | turboshaft ⓘ |
| era | 1960s ⓘ |
| fate | not selected for large-scale Army procurement ⓘ |
| firstFlight | 1960s ⓘ |
| lostTo | Hughes OH-6 Cayuse NERFINISHED ⓘ |
| manufacturer | Bell Helicopter NERFINISHED ⓘ |
| NATOReportingName | not applicable ⓘ |
| powerplant | Allison T63 turboshaft NERFINISHED ⓘ |
| primaryUser | United States Army NERFINISHED ⓘ |
| programName | Light Observation Helicopter program ⓘ |
| role |
light observation helicopter
ⓘ
scout helicopter ⓘ |
| status |
not mass-produced
ⓘ
prototype only ⓘ |
| successor | Bell 206 JetRanger NERFINISHED ⓘ |
| tailNumberExample | N73999 (civil-registered prototype) NERFINISHED ⓘ |
| usedFor |
evaluation
ⓘ
flight testing ⓘ |
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: Bell YOH-4 Description of subject: The Bell YOH-4 was a light observation helicopter prototype developed for the U.S. Army in the 1960s that served as the basis for the later Bell 206 JetRanger series.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.