Bavarian D VI
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|Bavarian D VI
DRG Class 98.75
"Berg" on 5 October 1985 in Bochum-Dahlhausen
|Number(s)||DRG 98 7501–7526|
|Year(s) of manufacture||1880–1894|
|Axle arrangement||B n2t|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in)|
|Length over buffers||6,860/6,910 mm|
|Service weight||18.5/19.6 t|
|Adhesive weight||18.5/19.6 t|
|Axle load||9.3/9.8 t|
|Top speed||45 km/h|
|Driving wheel diameter||1,006 mm|
|No. of cylinders||2|
|Cylinder bore||266 mm|
|Piston stroke||508 mm|
|Boiler Overpressure||12 bar|
|Grate area||0.75 m2|
|Evaporative heating area||25.71/28.50 m2|
|Water capacity||1.8/2.3 m3|
|Fuel||0.5/0.8 t coal|
|Locomotive brakes||Hardy vacuum brakes, some with compressed-air brakes|
The Bavarian Class D VI were German, 0-4-0, steam locomotives of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn). They were light, twin-coupled, saturated steam, tank engines. Maffei supplied the first 30 locomotives from 1880 to 1883, and Krauss delivered a further 23 up to 1894.
The Class D VI locomotives were procured for branch lines in flat terrain and had a maximum permitted axle load of 12 tons.
The first 44 locomotives had no side tanks. Water was stored in a well tank, and coal in the driver's cab. The last nine locomotives, on the other hand, had short tanks on either side, in front of the driver's cab. That increased water capacity from 1.8 to 2.3 m2 and coal capacity from 0.5 to 0.8 t.
In 1925 the Deutsche Reichsbahn-Gesellschaft took over 26 vehicles as DRG Class 98.75 (Baureihe 98.75), five of which had side tanks. They were retired by the end of the 1920s and some were sold on as industrial locomotives.
The final duties of former locomotive number 83, Berg (98 7508), delivered by Krauss in 1883, were in a peat factory in Raubling, where it was not taken out of service until 1964. This locomotive is the only surviving example of its class and is in the care of the German Railway History Company (Deutsche Gesellschaft für Eisenbahngeschichte e. V. or DGEG).
The Class D VI was manufactured with a rivetted plate frame that also acted as the water tank.
For the first time on Bavarian locomotives, running plates and Hardy vacuum brakes were installed on these saturated-steam engines. Several examples had gangways as well. An unusual feature was the location of the sandbox under the running plate between the coupled axles. They had slide valves on top and outside Stephenson link motion.