Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

EMD SD40

The EMD SD40 is a model of 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972. 1,268 locomotives were built between 1966 and 1972. In 1972, an improved version with new electronics was developed and marketed as a new locomotive, the SD40-2.

Products, Preservation & Design

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around EMD SD40. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Alternator
main : AR-10 auxiliary : D14
Aspiration
turbocharged
Build date
January 1966 – August 1972
Builder
GM Electro-Motive Division (EMD) General Motors Diesel (GMD)
Career
CareerLocaleNorth America South America Africa
Configuration:
​

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Design

Original owners

Derivatives and Experimental

SD40 rebuilds

Preservation

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

EMD SD40

Nodes73
Edges72
Triples55
Avg. degree1.97
Density0.027397
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

EMD SD40

Top relations

related to References · 22
EMD SD40 → December, Department, Electro-Motive Division, General Motors Corporation, Guide, IL, ISBN, Jerry, Kalmbach Publishing, La Grange, Milwaukee, Pinkepank, Retrieved, Robert, Sarberenyi, SD40, SD40A, SDP40 Operator's Manual, SDP40 Original Owners, The Modern Locomotive Handbook
Alternator · 1
EMD SD40 → main : AR-10 auxiliary : D14
Aspiration · 1
EMD SD40 → turbocharged
Build date · 1
EMD SD40 → January 1966 – August 1972
Builder · 1
EMD SD40 → GM Electro-Motive Division (EMD) General Motors Diesel (GMD)
Career · 1
EMD SD40 → CareerLocaleNorth America South America Africa
Configuration: · 1
EMD SD40 → ​
Coolant cap. · 1
EMD SD40 → 295 US gal (1,120 L; 246 imp gal)
Cylinders · 1
EMD SD40 → 16
Driver dia. · 1
EMD SD40 → 40 in (1,016 mm) diameter

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

sd40 emd museum locomotive southern built preserved 1966 railroad motors sd40-2 1972 donated ft 000 canadian traction us gal imp

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
EMD SD40Alternatormain : AR-10 auxiliary : D141.00infobox
EMD SD40Aspirationturbocharged1.00infobox
EMD SD40Build dateJanuary 1966 – August 19721.00infobox
EMD SD40BuilderGM Electro-Motive Division (EMD) General Motors Diesel (GMD)1.00infobox
EMD SD40CareerCareerLocaleNorth America South America Africa1.00infobox
EMD SD40Configuration:​1.00infobox
EMD SD40Coolant cap.295 US gal (1,120 L; 246 imp gal)1.00infobox
EMD SD40Cylinders161.00infobox
EMD SD40Driver dia.40 in (1,016 mm) diameter1.00infobox
EMD SD40Engine typeV16 diesel1.00infobox
EMD SD40Fuel capacity3,200 US gal (12,000 L; 2,700 imp gal)1.00infobox
EMD SD40Gauge.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .de…1.00infobox
EMD SD40Height15 ft 5+1⁄4 in (4.71 m)1.00infobox
EMD SD40Length65 ft 8 in (20.02 m) over the coupler pulling faces; 65 feet 9+1⁄2 inches (20.053 m) on some units starting early 1968.1.00infobox
EMD SD40LocaleNorth America South America Africa1.00infobox
EMD SD40Loco brakeIndependent air optional: dynamic brakes1.00infobox
EMD SD40Loco weight360,000 lb (160 t)1.00infobox
EMD SD40Lubricant cap.243 US gal (920 L; 202 imp gal)1.00infobox
EMD SD40Maximum speed83 mph (134 km/h)1.00infobox
EMD SD40ModelSD401.00infobox
EMD SD40Performance figuresPerformance figuresMaximum speed83 mph (134 km/h)Power output3,000 hp (2,240 kW)1.00infobox
EMD SD40Power output3,000 hp (2,240 kW)1.00infobox
EMD SD40Power typeDiesel-electric1.00infobox
EMD SD40Prime moverEMD 16-645E31.00infobox
EMD SD40Sandbox cap.56 cu ft (1.6 m3)1.00infobox
EMD SD40SpecificationsSpecificationsConfiguration: ​ • AARC-CGauge.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vert…1.00infobox
EMD SD40Total produced1,2681.00infobox
EMD SD40Traction motorsD-771.00infobox
EMD SD40Train brakesAir, schedule 26-L1.00infobox
EMD SD40Type and originType and originPower typeDiesel-electricBuilderGM Electro-Motive Division (EMD) General Motors Diesel (GMD)ModelSD40Build dateJanuary 1966 – August 1972Total produced1,2681.00infobox

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.