Bavarian D I

Class D I of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) was a tank locomotive with two coupled axles designed for shunting. As had been specified, these locomotives were simple and robust. They had a double-frame, with water tanks being suspended between the sole bars of the front section. Because the water capacity of 1.74 m3 soon proved too little even for a shunter operating only within the limits of its own station, additional side tanks were added to some engines during the 1880s. The outside Stephenson valve gear moved the valves on top of the horizontal cylinders. The locomotives could be braked using an Exter counterweight brake.

Bavarian D I
Number(s)Names and works nos.
DRG 88 7011–7017 (planned)
Quantity15
ManufacturerMaffei
Year(s) of manufacture1871-75
Retiredby 1923
Wheel arrangement0-4-0
Axle arrangementB n2t
Track gauge1,435 mm (4 ft 8 1⁄2 in) standard gauge
Length over buffers7,100 mm (23 ft 3 1⁄2 in)
Overall wheelbase2,135 mm (7 ft 0 in)
Service weight22.4 and 23.5 t (22.0 and 23.1 long tons; 24.7 and 25.9 short tons)
Adhesive weight22.4 and 23.5 t (22.0 and 23.1 long tons; 24.7 and 25.9 short tons)
Axle load11.2 and 11.8 t (11.0 and 11.6 long tons; 12.3 and 13.0 short tons) (centre)
Top speed45 km/h (28 mph)
Driving wheel diameter996 mm (39.21 in),
later 1,006 mm (39.61 in)
Valve gearStephenson, outside
No. of cylinders2
Cylinder bore280 mm (11.02 in)
Piston stroke508 mm (20.00 in)
Boiler Overpressure10 kp/cm2 (9.8 bar; 980 kPa; 140 psi)
Grate area0.74 m2 (8.0 sq ft)
Evaporative heating area47.0 m2 (506 sq ft)
Water capacity1.74 and 3.0 m3 (61 and 106 cu ft)
Fuel1.2 t (1.2 long tons; 1.3 short tons) coal
Parking brakeExter counterweight brake
Locomotive brakesExter counterweight brake

The D I saw shunting duties on small and medium-sized stations, for example in Schwandorf, Straubing or Neumarkt in der Oberpfalz. 13 locomotives were still in service when the Bavarian State Railway transferred to the Deutsche Reichsbahn in 1920. Seven vehicles were allocated numbers in the DRG renumbering plan for steam locomotives, but none were implemented as they were retired in 1923.

See also

Sources
    • v. Welser, Ludwig (1995). Bayern-Report. Band No. 5. Fürstenfeldbruck: Merker Verlag. ISBN 3-922404-78-2.
    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.