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Electro-Motive Division SD7, SD9, SD18 and SD24

Four Santa Fe SD18s in 1971 with a freight train

After the launch of the GP7, customers expressed the desire for a six-axle variant with a lower axle load . The GP7 was equipped with two three-axle bogies while maintaining the same engine power and the frame was len...

Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Variant
SD7
Built 1951-1963
Manufacturers Electro-Motive Division
Wheel arrangement CoCo
Gauge 1435 mm
Length 18663 mm
Service mass 140160 kg
Top speed 105 km/h
Power
Engine EMD 16-567B

General

Property Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Built 1951-1963
Manufacturers Electro-Motive Division
Wheel arrangement C-C
Gauge 1,435 mm

Dimensions and weights

Property Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Length 18.66 m
Wheelbase 14.81 m
Service mass 140.2 t
Adhesion mass 140.2 t
Rigid wheelbase 4.14 m
Axle load 23.4 t

Power plant

Property Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Engine EMD 16-567B
Engine type V16 diesel

Power

Property Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Power source diesel-electric
Indicated power 1,119 kW (1,521 PS)
Top speed 105 km/h
Starting effort 403.9 kN

Calculated values

Property Electro-Motive Division SD7, SD9, SD18 and SD24Remove
Factor of adhesion 1 : 3.40
Power-to-weight ratio 8.0 kW/t
Adhesive weight/Total 1 : 1.00
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