EMD SD40-2 locomotive
E507704
The EMD SD40-2 locomotive is a highly successful and widely used North American diesel-electric freight locomotive introduced in the 1970s, known for its reliability, modular design, and long service life.
All labels observed (2)
| Label | Occurrences |
|---|---|
| EMD SD40-2 | 1 |
| EMD SD40-2 locomotive canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5178066 — 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: EMD SD40-2 locomotive Context triple: [Electro-Motive Division, notableProduct, EMD SD40-2 locomotive]
-
A.
EMD GP7 locomotive
The EMD GP7 locomotive is a widely used four-axle diesel-electric road switcher introduced in the late 1940s that helped usher in the transition from steam to diesel power on North American railroads.
-
B.
EMD GP9 locomotive
The EMD GP9 locomotive is a widely used four-axle diesel-electric road switcher built in the 1950s that became one of North America's most successful and versatile freight and passenger locomotives.
-
C.
EMD FT locomotive
The EMD FT locomotive is a pioneering diesel-electric freight locomotive introduced in the late 1930s that helped establish Electro-Motive Division as a leader in replacing steam power on American railroads.
-
D.
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.
-
E.
EMD F40PH
The EMD F40PH is a widely used four-axle diesel-electric passenger locomotive built by Electro-Motive Division, best known for its long service on North American commuter and intercity 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: EMD SD40-2 locomotive Target entity description: The EMD SD40-2 locomotive is a highly successful and widely used North American diesel-electric freight locomotive introduced in the 1970s, known for its reliability, modular design, and long service life.
-
A.
EMD GP7 locomotive
The EMD GP7 locomotive is a widely used four-axle diesel-electric road switcher introduced in the late 1940s that helped usher in the transition from steam to diesel power on North American railroads.
-
B.
EMD GP9 locomotive
The EMD GP9 locomotive is a widely used four-axle diesel-electric road switcher built in the 1950s that became one of North America's most successful and versatile freight and passenger locomotives.
-
C.
EMD FT locomotive
The EMD FT locomotive is a pioneering diesel-electric freight locomotive introduced in the late 1930s that helped establish Electro-Motive Division as a leader in replacing steam power on American railroads.
-
D.
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.
-
E.
EMD F40PH
The EMD F40PH is a widely used four-axle diesel-electric passenger locomotive built by Electro-Motive Division, best known for its long service on North American commuter and intercity railroads.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf | diesel-electric locomotive ⓘ |
| AARWheelArrangement | C-C ⓘ |
| alsoUsedIn |
Brazil
NERFINISHED
ⓘ
Mexico NERFINISHED ⓘ New Zealand NERFINISHED ⓘ South Korea NERFINISHED ⓘ |
| aspiration | turbocharged ⓘ |
| brakeType | air ⓘ |
| buildEndDate | 1989 ⓘ |
| buildStartDate | 1972 ⓘ |
| controlStand | EMD standard control stand ⓘ |
| controlSystem | EMD Dash-2 modular electronics NERFINISHED ⓘ |
| cylinderCount | 16 ⓘ |
| dynamicBrakes | yes ⓘ |
| engineType | two-stroke diesel ⓘ |
| frameType | HT-C truck-equipped frame ⓘ |
| fuelType | diesel fuel ⓘ |
| gauge | standard gauge ⓘ |
| introducedForMarket | North American freight railroads ⓘ |
| introducedInDecade | 1970s ⓘ |
| lengthOverCouplers |
20.98 m
ⓘ
68 ft 10 in ⓘ |
| manufacturer |
Electro-Motive Division
NERFINISHED
ⓘ
General Motors Electro-Motive Division NERFINISHED ⓘ |
| marketReputation | one of the most successful North American road freight locomotives ⓘ |
| modelFamily | EMD SD40 series NERFINISHED ⓘ |
| notableFeature |
extended frame with front and rear porches
ⓘ
high reliability ⓘ long service life ⓘ modular electronic systems ⓘ |
| notableRebuildProgram | SD40-3 rebuilds ⓘ |
| operator |
BNSF Railway
NERFINISHED
ⓘ
Burlington Northern Railroad NERFINISHED ⓘ CSX Transportation NERFINISHED ⓘ Canadian National Railway NERFINISHED ⓘ Canadian Pacific Railway NERFINISHED ⓘ Conrail NERFINISHED ⓘ Norfolk & Western Railway NERFINISHED ⓘ Union Pacific Railroad NERFINISHED ⓘ |
| powerOutput |
2200 kW
ⓘ
3000 hp ⓘ |
| powerType | diesel-electric ⓘ |
| predecessorModel | EMD SD40 NERFINISHED ⓘ |
| primaryUse | freight service ⓘ |
| primeMover | EMD 16-645E3 NERFINISHED ⓘ |
| regionOfUse | North America NERFINISHED ⓘ |
| successorModel | EMD SD50 NERFINISHED ⓘ |
| totalProduced | over 3900 units ⓘ |
| trackGauge | 1435 mm ⓘ |
| transmission | electric ⓘ |
| truckType | EMD HT-C NERFINISHED ⓘ |
| UICClassification | Co′Co′ ⓘ |
| wheelDiameter | 40 in ⓘ |
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: EMD SD40-2 locomotive Description of subject: The EMD SD40-2 locomotive is a highly successful and widely used North American diesel-electric freight locomotive introduced in the 1970s, known for its reliability, modular design, and long service life.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
EMD SD40-2