USRA Heavy Mikado 2-8-2
E458224
The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USRA Heavy Mikado 2-8-2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4561518 — 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 Heavy Mikado 2-8-2 Context triple: [USRA standard steam locomotive designs, hasPart, USRA Heavy Mikado 2-8-2]
-
A.
USRA Light Mikado 2-8-2
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.
-
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 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.
-
D.
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.
-
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 Heavy Mikado 2-8-2 Target entity description: The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
-
A.
USRA Light Mikado 2-8-2
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.
-
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 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.
-
D.
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.
-
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 (41)
| Predicate | Object |
|---|---|
| instanceOf |
USRA standard locomotive design
ⓘ
freight locomotive ⓘ steam locomotive design ⓘ |
| administeredBy | United States Railroad Administration NERFINISHED ⓘ |
| boilerPressure | approximately 200 psi ⓘ |
| brakeType | air brakes ⓘ |
| builder |
American Locomotive Company
NERFINISHED
ⓘ
Baldwin Locomotive Works NERFINISHED ⓘ Lima Locomotive Works NERFINISHED ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | simple expansion ⓘ |
| cylinderCount | 2 ⓘ |
| cylinderPosition | outside ⓘ |
| designedDuring | United States federal control of railroads ⓘ |
| designedFor | freight service ⓘ |
| designer | United States Railroad Administration NERFINISHED ⓘ |
| era | World War I era NERFINISHED ⓘ |
| family | USRA Mikado designs NERFINISHED ⓘ |
| frameType | bar frame or cast steel frame depending on builder ⓘ |
| fuelType | coal ⓘ |
| gauge | standard gauge ⓘ |
| heritage | some locomotives or copies preserved in museums or tourist railroads ⓘ |
| influence | served as a pattern for many post-USRA 2-8-2 locomotives ⓘ |
| introduced | 1918 ⓘ |
| notableFeature |
high tractive effort
ⓘ
robust construction ⓘ standardized design ⓘ widespread use across multiple railroads ⓘ |
| powerType | steam ⓘ |
| primaryUse |
heavy freight trains
ⓘ
road freight service ⓘ |
| relatedDesign | USRA Light Mikado 2-8-2 NERFINISHED ⓘ |
| roleInHistory | standard heavy freight locomotive during USRA era ⓘ |
| serviceRegion | North America NERFINISHED ⓘ |
| serviceStatus | steam-era mainline service ended by mid-20th century ⓘ |
| tenderType | coal and water tender ⓘ |
| tractiveEffort | approximately 63,000 lbf ⓘ |
| usedBy | multiple Class I railroads in the United States ⓘ |
| valveGear | typically 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 Heavy Mikado 2-8-2 Description of subject: The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.