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EMD E9: Measurement & Products

The E9 is a 2,400-horsepower (1,790 kW), A1A-A1A passenger train-hauling diesel locomotive built by General Motors' Electro-Motive Division of La Grange, Illinois, between April 1954 and January 1964. 100 cab-equipped A units were produced and 44 cabless booster B units, all for service in the United States. The E9 was the tenth and last model of EMD…

Language: English [EN]
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EMD E9 topic overview

The analysis highlights Measurement and Products as prominent areas in the source structure around EMD E9.

Related topics
43
Source areas
5
Connected nodes
48
Extracted relationships
31
Concept neighborhoods
25
Bridge connections
48

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Operation · 15 topics
Overview · 13 topics
Surviving examples · 10 topics
Engine and powertrain · 4 topics
Original owners · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

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

Aspiration
Roots-blower
Build date
April 1954 – January 1964
Builder
General Motors Electro-Motive Division (EMD)
Career
CareerLocaleUnited StatesDisposition42 preserved, none in revenue service though some used on special trains, remainder scrapped
Configuration:
​
Cylinders
12

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Engine and powertrain

Operation

Original owners

Surviving examples

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.

How EMD E9 connects Entity context

The extracted context around EMD E9 shows recurring relationship patterns in the source. For example, EMD E9 → Roots-blower Another extracted example is EMD E9 → April 1954 – January 1964. Use these groups to spot repeated connection types before inspecting the individual relationships.

EMD E9

Top relations

Aspiration · 1
EMD E9 → Roots-blower
Build date · 1
EMD E9 → April 1954 – January 1964
Builder · 1
EMD E9 → General Motors Electro-Motive Division (EMD)
Career · 1
EMD E9 → CareerLocaleUnited StatesDisposition42 preserved, none in revenue service though some used on special trains, remainder scrapped
Configuration: · 1
EMD E9 → ​
Cylinders · 1
EMD E9 → 12
Disposition · 1
EMD E9 → 42 preserved, none in revenue service though some used on special trains, remainder scrapped
Engine type · 1
EMD E9 → V12 Two-stroke diesel
Fuel type · 1
EMD E9 → Diesel
Gauge · 1
EMD E9 → .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…

Important terminology

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

Important terminology

isbn e9 diesel units trains locomotives power railroad built emd engine union e9s wisconsin publishing kw pacific passenger illinois two

EMD E9 relationships Subject–Predicate–Object triples

TTTA extracted 31 structured relationships around EMD E9. Examples in this analysis include EMD E9 → Aspiration → Roots-blower and EMD E9 → Build date → April 1954 – January 1964. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
EMD E9AspirationRoots-blower1.00infobox
EMD E9Build dateApril 1954 – January 19641.00infobox
EMD E9BuilderGeneral Motors Electro-Motive Division (EMD)1.00infobox
EMD E9CareerCareerLocaleUnited StatesDisposition42 preserved, none in revenue service though some used on special trains, remainder scrapped1.00infobox
EMD E9Configuration:​1.00infobox
EMD E9Cylinders121.00infobox
EMD E9Disposition42 preserved, none in revenue service though some used on special trains, remainder scrapped1.00infobox
EMD E9Engine typeV12 Two-stroke diesel1.00infobox
EMD E9Fuel typeDiesel1.00infobox
EMD E9Gauge.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 E9Height14 ft 7 in (4.45 m)1.00infobox
EMD E9Length70 ft 3 in (21.41 m)1.00infobox
EMD E9LocaleUnited States1.00infobox
EMD E9Loco weightA unit: 315,000 lb (143,000 kg), B unit: 290,000 lb (130,000 kg)1.00infobox
EMD E9Maximum speed117 mph (188 km/h)1.00infobox
EMD E9Minimum curve27° - 214.18 ft (65.28 m)1.00infobox
EMD E9ModelE91.00infobox
EMD E9Performance figuresPerformance figuresMaximum speed117 mph (188 km/h)Power output2,400 hp (1,790 kW)Tractive effort56,500 lbf (251,000 N) starting, 31,000 lbf (140,000 N) continuous1.00infobox
EMD E9Power output2,400 hp (1,790 kW)1.00infobox
EMD E9Power typeDiesel-electric1.00infobox
EMD E9Prime mover(2) EMD 12-567C1.00infobox
EMD E9RPM:​1.00infobox
EMD E9SpecificationsSpecificationsConfiguration: ​ • AARA1A-A1AGauge.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;…1.00infobox
EMD E9Total produced100 A units, 44 B units1.00infobox
EMD E9Traction motors4 × GM D371.00infobox
EMD E9Tractive effort56,500 lbf (251,000 N) starting, 31,000 lbf (140,000 N) continuous1.00infobox
EMD E9Type and originType and originPower typeDiesel-electricBuilderGeneral Motors Electro-Motive Division (EMD)ModelE9Build dateApril 1954 – January 1964Total produced100 A units, 44 B units1.00infobox
EMD E9Wheel diameter36 in (914 mm)1.00infobox
EMD E9Width10 ft 7+1⁄2 in (3.239 m)1.00infobox
EMD E9• AARA1A-A1A1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around EMD E9 bring nearby vocabulary together. In this analysis, examples include Engines, Hp and Model. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • EMD E9
    • Engines
    • Hp
    • Model
    • Engine
    • A1a-a1a
    • Electro-motive
    • Power
    • Built
    • Emd
    • V12
    • Locomotives
    • Trains
  • emd e9
    • Engines
    • Kw
    • Model
    • Hp
    • Engine
    • V12
    • A1a-a1a
    • Electro-motive
    • January
    • Motors
    • Power
    • Illinois
  • diesel locomotive
    • Locomotive
    • Guide
    • American
    • Electro-motive
    • January
    • Kw
    • Locomotives
    • Built
    • Passenger
    • Power
    • E9
    • Railroad
  • a1a-a1a
    • Electro-motive
    • January
    • Kw
    • Motors
    • Engine
    • Power
    • V12
    • E9
    • Engines
    • Hp
    • Model
    • Service
  • emd e-unit
    • Engines
    • Hp
    • Model
    • Engine
    • Power
    • V12
    • Locomotives
    • Trains
    • January
    • Kw
    • Motors
    • Service
  • emd 645
    • Engines
    • Hp
    • Model
    • Engine
    • Power
    • V12
    • Locomotives
    • Trains
    • January
    • Kw
    • Motors
    • Service
  • electro-motive division
    • January
    • Kw
    • V12
    • Engines
    • Hp
    • Model
    • Motors
    • Service
    • Locomotive
    • Engine
    • Illinois
    • Passenger
  • v12
    • Engines
    • Hp
    • Kw
    • Model
    • Motors
    • Engine
    • Power
    • A1a-a1a
    • Electro-motive
    • January
    • Service
    • E9

Connections between topic areas Semantic bridges

For EMD E9, one of the stronger structural bridges in this analysis connects EMD E9 with Operation. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
EMD E9 — Operation · splits 33 ⟂ 16
EMD E9 — Overview · splits 35 ⟂ 14
EMD E9 — Surviving examples · splits 38 ⟂ 11
EMD E9 — Engine and powertrain · splits 44 ⟂ 5

Map overview Semantic statistics

EMD E9

Nodes49
Edges48
Triples31
Avg. degree1.96
Density0.040816
Components1

Source & methodology

TTTA analyzes the structure around EMD E9 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Measurement & Products, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — EMD E9 · EN edition · Analysis: TopicsToTalkAbout

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