USRA Light Mikado 2-8-2
E454463
The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USRA Light Mikado 2-8-2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4561517 — 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: USRA Light Mikado 2-8-2 Context triple: [USRA standard steam locomotive designs, hasPart, USRA Light Mikado 2-8-2]
-
A.
USRA Light Pacific 4-6-2
The USRA Light Pacific 4-6-2 was a widely used American passenger steam locomotive type developed under the United States Railroad Administration during World War I, known for its balanced performance and standardized design.
-
B.
USRA Heavy Pacific 4-6-2
The USRA Heavy Pacific 4-6-2 was a standardized heavy passenger steam locomotive design used by multiple American railroads during the United States Railroad Administration era in World War I.
-
C.
USRA 0-8-0 switcher
The USRA 0-8-0 switcher was a standardized heavy steam switching locomotive widely used in North American rail yards during the early 20th century.
-
D.
USRA 0-6-0 switcher
The USRA 0-6-0 switcher was a standardized American steam locomotive type designed for yard and switching duties under the United States Railroad Administration during World War I.
-
E.
USRA 2-6-6-2 articulated locomotive
The USRA 2-6-6-2 articulated locomotive was a standardized World War I–era American steam freight engine featuring a Mallet-type articulated wheel arrangement designed for heavy, slow freight service on steep grades and curving track.
- 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: USRA Light Mikado 2-8-2 Target entity description: The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
-
A.
USRA Light Pacific 4-6-2
The USRA Light Pacific 4-6-2 was a widely used American passenger steam locomotive type developed under the United States Railroad Administration during World War I, known for its balanced performance and standardized design.
-
B.
USRA Heavy Pacific 4-6-2
The USRA Heavy Pacific 4-6-2 was a standardized heavy passenger steam locomotive design used by multiple American railroads during the United States Railroad Administration era in World War I.
-
C.
USRA 0-8-0 switcher
The USRA 0-8-0 switcher was a standardized heavy steam switching locomotive widely used in North American rail yards during the early 20th century.
-
D.
USRA 0-6-0 switcher
The USRA 0-6-0 switcher was a standardized American steam locomotive type designed for yard and switching duties under the United States Railroad Administration during World War I.
-
E.
USRA 2-6-6-2 articulated locomotive
The USRA 2-6-6-2 articulated locomotive was a standardized World War I–era American steam freight engine featuring a Mallet-type articulated wheel arrangement designed for heavy, slow freight service on steep grades and curving track.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
USRA standard locomotive design
ⓘ
freight locomotive ⓘ steam locomotive type ⓘ |
| axleArrangement |
eight driving wheels on four axles
ⓘ
two leading wheels on one axle ⓘ two trailing wheels on one axle ⓘ |
| boilerType | fire-tube boiler ⓘ |
| brakeType | air brakes ⓘ |
| category |
2-8-2 locomotives
ⓘ
standard steam locomotives of the United States ⓘ |
| configurationName | Mikado NERFINISHED ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | simple expansion ⓘ |
| cylinderCount | 2 ⓘ |
| designedBy | USRA Mechanical Engineering staff ⓘ |
| designedFor |
balanced performance
ⓘ
operation on lighter track than heavy Mikado designs ⓘ standardized construction ⓘ use on multiple railroads ⓘ |
| designer | United States Railroad Administration NERFINISHED ⓘ |
| designPhilosophy | standard design adaptable to many railroads ⓘ |
| developedDuring | United States Railroad Administration control of railroads ⓘ |
| era | World War I era ⓘ |
| fuelType | coal ⓘ |
| gauge | 4 ft 8 1⁄2 in ⓘ |
| historicalSignificance | one of the most widely used USRA standard locomotive types ⓘ |
| introduced | 1918 ⓘ |
| nickname | USRA Light Mikado NERFINISHED ⓘ |
| periodOfUse |
1910s
ⓘ
1920s ⓘ 1930s ⓘ 1940s ⓘ 1950s ⓘ |
| powerType | steam ⓘ |
| primaryUse | freight service ⓘ |
| relatedDesign | USRA Heavy Mikado 2-8-2 NERFINISHED ⓘ |
| serviceRole |
general freight
ⓘ
road freight ⓘ |
| standardGauge | yes ⓘ |
| standardizationGoal |
interchangeability of parts
ⓘ
simplified wartime production ⓘ |
| tenderType | coal and water tender ⓘ |
| UICClassification | 1′D1′ h2 ⓘ |
| usedBy | multiple American railroads ⓘ |
| usedIn | United States freight operations ⓘ |
| valveGear | Walschaerts valve gear ⓘ |
| wheelArrangement | 2-8-2 ⓘ |
| WhyteNotation | 2-8-2 ⓘ |
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: USRA Light Mikado 2-8-2 Description of subject: The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.