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New Zealand Railways classes D[h]G[/h] and D[h]H[/h]

D[h]G[/h] 770 in January 2017 on the Weka Pass Railway

The NZR class D[h]G[/h] diesel locomotive was designed in the early fifties by English Electric as a response to a change in the dieselisation strategy. An order for 21 more 1,500-hp class D[h]F[/h] locomotives was tr...

	New Zealand Railways classes D[h]G[/h] and D[h]H[/h]Remove
Variant	D[h]G[/h] D[h]G[/h] D[h]H[/h]
Built	1955-1956
Manufacturers	English Electric;Robert Stephenson & Hawthorns
Wheel arrangement	(A1A)(A1A)
Gauge	1067 mm
Length	13716 mm
Service mass	70107 kg
Top speed	97 km/h
Power
Engine	English Electric 6SRKT Mark 2

General

Property	New Zealand Railways classes D[h]G[/h] and D[h]H[/h] D[h]G[/h] D[h]G[/h] D[h]H[/h] Remove
Built	1955-1956
Manufacturers	English Electric, Robert Stephenson & Hawthorns
Wheel arrangement	A1A-A1A
Gauge	1,067 mm

Dimensions and weights

Property	New Zealand Railways classes D[h]G[/h] and D[h]H[/h] D[h]G[/h] D[h]G[/h] D[h]H[/h] Remove
Length	13.72 m
Wheelbase	11.28 m
Service mass	70.1 t
Adhesion mass	46.6 t
Rigid wheelbase	3.51 m
Axle load	11.7 t

Power plant

Property	New Zealand Railways classes D[h]G[/h] and D[h]H[/h] D[h]G[/h] D[h]G[/h] D[h]H[/h] Remove
Engine	English Electric 6SRKT Mark 2
Engine type	6-cyl. diesel

Power

Property	New Zealand Railways classes D[h]G[/h] and D[h]H[/h] D[h]G[/h] D[h]G[/h] D[h]H[/h] Remove
Power source	diesel-electric
Indicated power	559 kW (760 PS)
Top speed	97 km/h
Starting effort	115.7 kN

Calculated values

Property	New Zealand Railways classes D[h]G[/h] and D[h]H[/h] D[h]G[/h] D[h]G[/h] D[h]H[/h] Remove
Factor of adhesion	1 : 3.96
Power-to-weight ratio	8.0 kW/t
Adhesive weight/Total	1 : 1.50

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