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BR 03

The first plans of the DRG for standard design locomotives foresaw only the steam engines BR 01 and BR 02. Both locomotives were meant for mainlines designed for trains with an axle load of 20 ton. But the rebuilding of these lines which were not suitable for trains with an axle load of 20 ton took more time than calculated. So especially the North German railway directors encouraged the building of steam engines with an axle load of 17,5 ton. These locomotives must replace the old BR 17.0-1 and BR 17.2 (both from the Prussian S10 family).

These new steam engines, planned as BR 03, were originally four cylinder steam engines, but the DRG chose finally for the favorable two cylinder version. Borsig delivered the first three prototype locomotives on 8 July 1930. These locomotives had a boiler pressure of 14 bar and a cylinder diameter of 600 mm. The mass production locomotives had a boiler pressure of 16 bar and a cylinder diameter of 570 mm. From 1930 until 1938 298 steam engines of the series 03 were built and deliverd by the manufacturers Borsig, Henschel, Krupp and Schwartzkopff.

From locomotive 03 123 there were a few modifications of the series. The brass firebox became iron and the airpump was placed elsewhere. From 03 163 the carrying wheels got a diameter of 1000 mm and the driving wheels were equiped with shoe brakes. Besides these modifications, there are a couple of locomotives who had modifications by experiments. Locomotive 03 154 became partly streamlined and got a parabolic smoke box door. The 03 193 was streamlined like the BR 05 and the 03 204 was only streamlined at the driving wheels.

Axle layout: 2'C1'h2
In service: 1930-1938
Diameter driving wheels: 2000 mm
Length (with tender 2'2'T32): 23,90 m
Top speed: 130 km/h
Power: 1.980 pk/hp
Boiler pressure: 16 bar
Vaporize surface: 201,96 m2
Cylinder diameter: 570 mm
Weight (without tender): 99,6 t, 100,3 t (from 03 123)


Das große typenbuch Deutscher Lokomotiven
Transpress, Berlin, 1992