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Hejaz Railway Krauss, Jung 2-8-0

Ottoman Empire 1903 45 produced
Jung variant of 1907 flickr/Historical Railway Images PD

After the opening of the first section of the Hedjaz Railway, there was the need for powerful freight locomotives. Like most Hedjaz locomotives, they were built by German manufacturers. In this case, Krauss of Munich built 14 2-8-0 between 1903 and 1905. The completion of new sections meant that Krauss delivered 19 more in the following years.

They had the typical look of many German locomotives, but due to their gauge of only 1,050 mm, there was a partial frame outside of the driving wheels. The cylinders were placed in front of the leading axle. The tender was relatively large for a narrow gauge locomotive and held 12.000 liters of water.

When the complete line between Damascus and Medina had been opened and different secondary lines were being planned, twelve additional locomotives were ordered from Jung. These differed somewhat from the Krauss machines, for example in the exact placement of the axles. Nevertheless, many parts were interchangeable, as stated in the requirements.

Technical data

General

Built
1903-1911
Manufacturers
Krauss, Jung
Wheel arrangement
2-8-0 (Consolidation)
Gauge
1,050 mm

Dimensions and weights

Wheelbase
4.27 m
Service mass
45.7 t
Adhesion mass
40.4 t
Total mass
75.7 t
Rigid wheelbase
2.20 m
Axle load
10.1 t
Water capacity
12,000 l

Boiler

Grate area
1.67 m²
Firebox surface
7.12 m²
Tube heating surface
117.69 m²
Evaporative heating surface
124.81 m²
Total heating surface
124.8 m²

Power plant

Driver diameter
1,090 mm
Boiler pressure
12 bar
Expansion type
simple expansion
Cylinders
two, 410 x 500 mm

Power

Power source
steam
Estimated power
425 kW (578 PS)
Starting effort
78.7 kN

Calculated values

Factor of adhesion
1 : 5.04
Optimal speed
34 km/h
Power-to-weight ratio
9.3 kW/t
Heating Surface Equivalent
160.4 m²
Cylinder volume/HSE
1 : 823.05
Adhesive weight/Total
1 : 1.13
Tractive force/Heating surface
1 : 13.16
Grate area/Heating surface
1 : 74.74
Firebox/Tube surface
1 : 16.53
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