4-8-2 Mountain steam locomotives
E1045817
4-8-2 Mountain steam locomotives are steam engines with a wheel arrangement of four leading wheels, eight driving wheels, and two trailing wheels, designed primarily for hauling heavy passenger and freight trains over steep gradients.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 4-8-2 Mountain steam locomotives canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13506007 — 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: 4-8-2 Mountain steam locomotives Context triple: [Romney, Hythe and Dymchurch Railway, hasLocomotiveType, 4-8-2 Mountain steam locomotives]
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A.
USRA Heavy Mountain 4-8-2
The USRA Heavy Mountain 4-8-2 was a standardized World War I–era American steam locomotive design built for heavy passenger and fast freight service, featuring a 4-8-2 wheel arrangement and robust construction for demanding mainline duties.
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B.
Heisler locomotive
A Heisler locomotive is a type of geared steam locomotive, recognizable by its V‑twin cylinder arrangement and used primarily on logging and industrial railroads for hauling heavy loads over steep, rough track.
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C.
Atchison Topeka and Santa Fe 4-8-4 locomotive
The Atchison, Topeka and Santa Fe 4-8-4 locomotive is a powerful steam engine from the famed Santa Fe Railway, known for hauling high-speed passenger and heavy freight trains across the American West in the mid-20th century.
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D.
USRA Light Mountain 4-8-2
The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
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E.
USRA 2-8-8-2 articulated locomotive
The USRA 2-8-8-2 articulated locomotive was a heavy freight steam engine design developed under the United States Railroad Administration during World War I, known for its powerful compound articulated configuration used by multiple American railroads.
- 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: 4-8-2 Mountain steam locomotives Target entity description: 4-8-2 Mountain steam locomotives are steam engines with a wheel arrangement of four leading wheels, eight driving wheels, and two trailing wheels, designed primarily for hauling heavy passenger and freight trains over steep gradients.
-
A.
USRA Heavy Mountain 4-8-2
The USRA Heavy Mountain 4-8-2 was a standardized World War I–era American steam locomotive design built for heavy passenger and fast freight service, featuring a 4-8-2 wheel arrangement and robust construction for demanding mainline duties.
-
B.
Heisler locomotive
A Heisler locomotive is a type of geared steam locomotive, recognizable by its V‑twin cylinder arrangement and used primarily on logging and industrial railroads for hauling heavy loads over steep, rough track.
-
C.
Atchison Topeka and Santa Fe 4-8-4 locomotive
The Atchison, Topeka and Santa Fe 4-8-4 locomotive is a powerful steam engine from the famed Santa Fe Railway, known for hauling high-speed passenger and heavy freight trains across the American West in the mid-20th century.
-
D.
USRA Light Mountain 4-8-2
The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
-
E.
USRA 2-8-8-2 articulated locomotive
The USRA 2-8-8-2 articulated locomotive was a heavy freight steam engine design developed under the United States Railroad Administration during World War I, known for its powerful compound articulated configuration used by multiple American railroads.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
steam locomotive type
ⓘ
steam locomotive wheel arrangement ⓘ |
| designedFor |
hauling heavy freight trains
ⓘ
hauling heavy passenger trains ⓘ operation over steep gradients ⓘ |
| developedFrom | earlier 4-6-2 Pacific types ⓘ |
| hasAlternativeName |
4-8-2 Mountain type
NERFINISHED
ⓘ
Mountain locomotives ⓘ |
| hasConfigurationFeature |
leading truck for stability at speed
GENERATED
ⓘ
multiple coupled driving axles for tractive effort GENERATED ⓘ trailing truck to support large firebox GENERATED ⓘ |
| hasDesignGoal |
balance between speed and power
ⓘ
greater steaming capacity than 4-6-2 types ⓘ improved adhesion on steep grades ⓘ |
| hasDrivingWheels | 8 ⓘ |
| hasEraOfUse |
early 20th century
ⓘ
mid 20th century ⓘ |
| hasLeadingTruck | two-axle leading truck ⓘ |
| hasLeadingWheels | 4 ⓘ |
| hasName | Mountain type ⓘ |
| hasNumberOfCoupledAxles | 4 ⓘ |
| hasNumberOfLeadingAxles | 2 ⓘ |
| hasNumberOfTrailingAxles | 1 ⓘ |
| hasPowerType | steam ⓘ |
| hasTrailingTruck | one-axle trailing truck ⓘ |
| hasTrailingWheels | 2 ⓘ |
| hasTypicalFeature |
good high-speed stability
ⓘ
high tractive effort ⓘ large firebox for sustained steaming ⓘ |
| hasTypicalUseCase |
heavy mixed-traffic trains
ⓘ
long-distance express trains ⓘ mountainous routes ⓘ |
| hasUICClassification | 2D1 ⓘ |
| hasWhyteNotation | 4-8-2 ⓘ |
| isNonArticulated | true ⓘ |
| operatedInCountry |
Argentina
NERFINISHED
ⓘ
Australia NERFINISHED ⓘ Brazil NERFINISHED ⓘ Canada NERFINISHED ⓘ China NERFINISHED ⓘ France NERFINISHED ⓘ New Zealand NERFINISHED ⓘ South Africa NERFINISHED ⓘ Spain NERFINISHED ⓘ United States NERFINISHED ⓘ |
| supportsFireboxType | wide firebox GENERATED ⓘ |
| usedInServiceType |
fast freight service
ⓘ
mainline passenger service ⓘ mixed traffic service ⓘ |
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: 4-8-2 Mountain steam locomotives Description of subject: 4-8-2 Mountain steam locomotives are steam engines with a wheel arrangement of four leading wheels, eight driving wheels, and two trailing wheels, designed primarily for hauling heavy passenger and freight trains over steep gradients.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.