An EMD Model 40 at the Travel Town Museum in Los Angeles, California
Type and origin
Power type
Diesel-electric
Designer
Electro-Motive Corporation (EMC)
Builder
General Motors Electro-Motive Division (EMD)
Model
Model 40
Build date
April 1940 – April 1943
Total produced
11
Specifications
Configuration:
• Whyte
4wDE
• AAR
B
• UIC
Bo
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter
45 in (1,143.0 mm)
Wheelbase
13 ft (4.0 m)
Length
26 ft 1 in (7.95 m)
Height
13 ft 2.5 in (4.03 m)
Loco weight
82,000 lb (37,000 kg)
Fuel type
Diesel
Prime mover
(2) Detroit Diesel D71
Engine type
Inline 6-cylinder two-stroke diesel engine
Aspiration
Naturally aspirated
Displacement
426 cu in (6,981 cc) per engine
Generator
EMD D7
Traction motors
(2) EMD DC
Cylinders
(2) 6
Cylinder size
4.25 in (108.0 mm)
Piston stroke
5 in (127.0 mm)
Transmission
Diesel-electric, direct current
Loco brake
Westinghouse 14-EL air brake
Couplers
Janney (AAR)
Performance figures
Maximum speed
30 mph (48.3 km/h)
Power output
Total: 300 hp (223.7 kW) Per engine: 150 hp (111.9 kW)
Career
Nicknames
Critters
Locale
North America
Main reference [1]
The EMD Model 40 was a two-axle diesel-electric switcher locomotive built by Electro-Motive Corporation (EMC), and its corporate successor, General Motors' Electro-Motive Division (EMD) between August 1940 and April 1943. Nicknamed "critters", eleven examples of this locomotive were built. Powered by twin General Motors Detroit Diesel 6-71 diesel engines, which produce a combined 300 horsepower (224 kW), its drivetrain is unusual because the two diesel engines are used to drive the electric DC generator from both sides, one with clockwise rotation and the other with counter-clockwise rotation.
Original buyers for the Model 40 included the Electro-Motive Corporation/Electro-Motive Diesel Plant, 1 unit (used as the #2 plant switcher), Defense Plant Corporation, 4 units, the United States Army, 3 units, the United States Navy, 2 units, and the General Motors Cleveland Diesel Division, 1 unit.
In total EMC/EMD manufactured eleven Model 40s during the period April 1940 - April 1943.
^"EMD Model 40". thedieselshop.us. Retrieved 2024-02-05.
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