USRA 2-8-8-2 articulated locomotive
E453381
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USRA 2-8-8-2 articulated locomotive canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4561526 — 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 2-8-8-2 articulated locomotive Context triple: [USRA standard steam locomotive designs, hasPart, USRA 2-8-8-2 articulated locomotive]
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A.
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.
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B.
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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C.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
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D.
GG1 electric locomotive
The GG1 electric locomotive was a streamlined, high-speed electric locomotive class that became an iconic workhorse of American railroading, particularly in the Northeast corridor, during much of the 20th century.
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E.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
- 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 2-8-8-2 articulated locomotive Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
-
D.
GG1 electric locomotive
The GG1 electric locomotive was a streamlined, high-speed electric locomotive class that became an iconic workhorse of American railroading, particularly in the Northeast corridor, during much of the 20th century.
-
E.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
USRA standard locomotive design
ⓘ
articulated locomotive ⓘ freight locomotive ⓘ steam locomotive design ⓘ |
| administration | United States Railroad Administration standardization program NERFINISHED ⓘ |
| administrationPeriod | United States Railroad Administration era 1917–1920 ⓘ |
| articulationType | Mallet-type articulated ⓘ |
| boilerType | fire-tube boiler ⓘ |
| category |
USRA standard locomotives
NERFINISHED
ⓘ
articulated steam locomotives ⓘ freight steam locomotives ⓘ |
| configuration | Whyte notation 2-8-8-2 ⓘ |
| controlAuthority | United States Railroad Administration NERFINISHED ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | compound ⓘ |
| cylinderUse | high-pressure cylinders and low-pressure cylinders ⓘ |
| designedFor |
heavy coal trains
ⓘ
mountain grades ⓘ |
| designer | United States Railroad Administration NERFINISHED ⓘ |
| designType | compound articulated ⓘ |
| developedDuring | World War I NERFINISHED ⓘ |
| fuelType | coal ⓘ |
| gauge | standard gauge ⓘ |
| historicalContext | wartime federal control of U.S. railroads ⓘ |
| introducedBy | United States Railroad Administration NERFINISHED ⓘ |
| introducedInDecade | 1910s ⓘ |
| notableFeature |
articulated engine units for negotiating curves
ⓘ
compound expansion for improved efficiency ⓘ |
| powerType | steam ⓘ |
| primaryUse | slow heavy freight trains ⓘ |
| purpose | heavy freight service ⓘ |
| regionOfOperation | North America NERFINISHED ⓘ |
| roleInProgram | standard heavy articulated freight design ⓘ |
| serviceType | road freight ⓘ |
| tractionCharacteristic | high tractive effort ⓘ |
| usedBy |
Baltimore and Ohio Railroad
NERFINISHED
ⓘ
Chesapeake and Ohio Railway NERFINISHED ⓘ Norfolk and Western Railway NERFINISHED ⓘ Virginian Railway NERFINISHED ⓘ other American railroads ⓘ |
| wheelArrangement | 2-8-8-2 ⓘ |
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 2-8-8-2 articulated locomotive Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.