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Electro-Motive Division GP7, GP9, GP18 and GP20

Pennsylvania Railroad GP7 No. 8548 probably in August 1955 in Baltimore, Maryland. Next to her is Reading Co. Class T-1 No. 2117.

After ALCO, Baldwin and Fairbanks-Morse already had successful road switchers on offer, EMD did not offer the first model in this category until 1949 with the GP7. The “GP” stood for “General Purpose”, which was inten...

	Electro-Motive Division GP7, GP9, GP18 and GP20 Remove
Variant	GP7 GP7 GP9 GP18 GP20
Built	1949-1963
Manufacturers	Electro-Motive Division;General Motors Diesel
Wheel arrangement	BoBo
Gauge	1435 mm
Length	17043 mm
Service mass	111584 kg
Top speed	105 km/h
Power
Engine	EMD 16-567B

General

Property	Electro-Motive Division GP7, GP9, GP18 and GP20 GP7 GP7 GP9 GP18 GP20 Remove
Built	1949-1963
Manufacturers	Electro-Motive Division, General Motors Diesel
Wheel arrangement	B-B
Gauge	1,435 mm

Dimensions and weights

Property	Electro-Motive Division GP7, GP9, GP18 and GP20 GP7 GP7 GP9 GP18 GP20 Remove
Length	17.04 m
Wheelbase	12.19 m
Service mass	111.6 t
Adhesion mass	111.6 t
Rigid wheelbase	2.74 m
Axle load	27.9 t

Power plant

Property	Electro-Motive Division GP7, GP9, GP18 and GP20 GP7 GP7 GP9 GP18 GP20 Remove
Engine	EMD 16-567B
Engine type	V16 diesel

Power

Property	Electro-Motive Division GP7, GP9, GP18 and GP20 GP7 GP7 GP9 GP18 GP20 Remove
Power source	diesel-electric
Indicated power	1,119 kW (1,521 PS)
Top speed	105 km/h
Starting effort	289.1 kN

Calculated values

Property	Electro-Motive Division GP7, GP9, GP18 and GP20 GP7 GP7 GP9 GP18 GP20 Remove
Factor of adhesion	1 : 3.79
Power-to-weight ratio	10.0 kW/t
Adhesive weight/Total	1 : 1.00

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