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The reference for locomotives and railcars

Dutch Railways series 4700

Netherlands 1945 35 produced
No. 4703 Het Utrechts Archief PD

In World War II, when the Dutch exile government expected a severe shortage of locomotives after the war, they ordered two types of steam locomotives from NoHAB of Sweden. For freight service, 35 0-8-0 locomotives were ordered which were directly based on the TGOJ M3b. They were delivered after the end of the war and numbered in the range from 4701 to 4735. The other type were the 15 4-6-0 locomotives of the series 4000.

Three cylinders were unusual for the Netherlands, but gave them the highest tractive effort of any steam locomotive in the country. The fully enclosed cab was a sign for the Nordic origin of these locomotives. The electric lighting of the running gear, what was also not common in the Netherlands, earned them the nickname “Kerstboom” (“Christmas tree”).

Although they had been designed for freight service, their third cylinder ensured good running characteristics up to 70 km/h. So they were also used in passenger service when needed. As electrification progressed, they were used almost exclusively for coal traffic in Limburg in the fifties. Their withdrawals followed until 1957.

Technical data

General

Built
1945-1946
Manufacturers
NoHAB
Wheel arrangement
0-8-0 (Eight-coupled)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
19.28 m
Wheelbase
4.95 m
Service mass
74.8 t
Adhesion mass
74.8 t
Total mass
121 t
Rigid wheelbase
4.95 m
Axle load
18.7 t
Water capacity
22,500 l
Fuel capacity
7 t (coal)

Boiler

Grate area
3.02 m²
Firebox surface
12.3 m²
Tube heating surface
135.8 m²
Evaporative heating surface
148.1 m²
Superheater surface
48.5 m²
Total heating surface
196.6 m²

Power plant

Driver diameter
1,350 mm
Boiler pressure
13 bar
Expansion type
simple expansion
Cylinders
three, 500 x 660 mm

Power

Power source
steam
Indicated power
1,250 kW (1,700 PS)
Top speed
70 km/h
Starting effort
202.6 kN

Calculated values

Factor of adhesion
1 : 3.62
Optimal speed
37 km/h
Power-to-weight ratio
16.7 kW/t
Heating Surface Equivalent
306.6 m²
Cylinder volume/HSE
1 : 1,268.01
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 21.52
Grate area/Heating surface
1 : 65.10
Firebox/Tube surface
1 : 11.04
Total/Superheater
1 : 3.05
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