BR 17.2

After the delivering in 1911 of the four cylinder steam locomotives S10 and S10.1 to the Prussian railways, the Prussian railways ordered in 1914 a third version of these 2'C express train locomotives. The new version was of type S10.2 and had like the S10 a single axle transmission. The manufacturers Vulcan, Hannomag and Schwartzkopff made 124 locomotives of type S10.2.

In service at the DRG

The DRG took over 96 steam locomotives of this type in 1925 and put them under the numbers 17 201 up to 17 296 into service. Within the framework of testing with medium pressure locomotives with boiler pressure till 25 bar, the DRG transformed the standard design locomotives 04 001/002, 24 069/070 and 44 011/012 also two S10.2 steam locomotives, the 17 236 and 17 239, to medium pressure locomotives. The locomotives got a new boiler and new inner cylinders. After disappointing experiments with the test of locomotive 17 206 with a high pressure boiler, they tried it with a boiler of 25 bar. Both steam locomotives got in 1933 in Raw Braunschweig new boilers from Schwartzkopff, new fire boxes and new inner cylinders. Testruns, performed by the LVA Grunewald demonstrated that the medium pressure locomotives had the same power as a BR 03, but the medium pressure locomotive was more efficient with coals than a conventional BR 17 locomotive. Both locomotives were gone to Bw Hannover Ost and were put in the regular service with the BR 03. However later the boiler pressure had to be lowered to 16 bar to prevent extensive damage to the boilers. In 1948 the locomotives were put aside through the DB.

The 17 206 had played a special role in mid twenties. The DRG experimented al lot in the mid twenties to increase the efficiency of steam locomotives. One possibility was the raising of boiler pressure, because steam under pressure delivered much more energy. In 1925 locomotive 17 206 was equiped with a new boiler and new inner cylinders. A through the "Schmidtschen Heißdampfgesellschaft" made boiler reached a pressure of 60 bar. With steam of a low pressure boiler (14 bar) the high pressure boiler was heated up to a temperature of 440 °C. The experiments of the LVA Grunewald with this locomotive were not satisfying. The disadvantage was the high coal consumption. The locomotive was rebuilt back to it's original state in 1929 and was set aside in 1936.

After the second world war the DB took over 88 steam engines S10.2.