DB class 78.10

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DB class 78.10
Numbering: DB 78 1001-1002
Number: 2
Manufacturer: Krauss Maffei
Year of construction (s): 1951
Retirement: 1961
Axis formula : 2'C2 '
Gauge : 1435 mm ( standard gauge )
Length over buffers: 17,237 mm
Height: 4,550 mm
Total wheelbase: 14,070 mm
Empty mass: 81 t
Service mass: 110.0 t
Friction mass: 51.1 t
Wheel set mass : 17.3 t
Top speed: 100 km / h
Indexed performance : 868 kW
Driving wheel diameter: 1,750 mm
Impeller diameter front: 1,000 mm
Rear wheel diameter: 1,000 mm
Control type : Heusinger
Cylinder diameter: 575 mm
Piston stroke: 630 mm
Boiler overpressure: 12 bar
Number of heating pipes: 123
Number of smoke tubes: 26th
Heating pipe length: 4,700 mm
Grate area: 2.58 m²
Superheater area : 58.90 m²
Evaporation heating surface: 143.28 m²
Water supply: 17 m³
Fuel supply: 5 t
Brake: Air brake

The two vehicles of the class 78.10 of the Deutsche Bundesbahn were steam locomotives developed by the Krauss-Maffei company and the Minden repair shop based on the Prussian P 8 . The aim was to improve the acceleration values ​​of the vehicles, especially for use on suburban and light rail vehicles .

Features and history

The running gear and engine as well as the boiler of the two vehicles with the original road numbers 38 2919 and 38 2990 remained almost unchanged. The driver's cab was redesigned. There was also a short tender, which was coupled to the locomotive via a drawbar and which improved the running characteristics when reversing. As tank locomotives , they were given the road numbers 78 1001 and 1002. They first ran in the Munich area , later in the Augsburg area and finally on Lake Constance .

Further P8 locomotives were not converted, because when the war locomotives were retired from the DB by 1954, a large number of tub tenders that could be coupled with the P8 were released. This made it possible to convert to locomotives capable of pushing trains with a reverse speed of 85 km / h and a much greater range, even with simpler means.

Thus the two locomotives 78 1001 and 78 1002 remained the only ones of their kind and were retired in 1961 and then scrapped.

literature

  • Manfred Weisbrod, Hans Müller, Wolfgang Petznick: Steam locomotives of German railways. Series 60–96 , Düsseldorf 1982, ISBN 3-87094-083-2 .