Bavarian D IX
|This article does not cite any sources. (December 2016) (Learn how and when to remove this template message)|
|Bavarian D IX
DRG Class 70.71
|Number(s)||DRG 70 7101–7154|
|Year(s) of manufacture||1888–1899|
|Axle arrangement||1B n2|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in)|
|Length over buffers||8,440 mm|
|Service weight||35.8 t|
|Adhesive weight||24.8 t|
|Axle load||12.4 t|
|Top speed||65 km/h|
|Driving wheel diameter||1,340 mm|
|Leading wheel diameter||1,040 mm|
|Cylinder bore||330 mm|
|Piston stroke||500 mm|
|Boiler Overpressure||12 bar|
|Grate area||1.20 m2|
|Evaporative heating area||60.20 m2|
The D IX steam locomotive was manufactured by the firm of Maffei between 1888 and 1899 for the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn). They were used on the route from Reichenhall via Freilassing to Salzburg. After one engine had been successfully employed on the route to Berchtesgaden, the vehicles were also deployed on the suburban lines of Augsburg, Munich and Nuremberg.
There were scarcely any differences between the various build series. Not until 1896 were minor changes made to the heating areas, the weights and the coal and water capacities. The rigid mounting of the driving and carrying wheels and the location of the cylinder just in front of the carrying wheel did not prove a success. The D IX locomotives could haul 170 t on the flat at a speed of 65 km/h, on routes with a 2% incline they could manage 95 tons at 20 km/h.
Unfortunately no examples of the Bavarian D IX have been preserved.