DB class 78.10
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 .