DB Class 78.10

DB Class 78.10
DB Class 78.10
Number(s): DB 78 1001–1002
Quantity: 2
Manufacturer: Krauss-Maffei
Year(s) of manufacture: 1951
Retired: 1961
Wheel arrangement: 4-6-4T
Axle arrangement: 2'C2'
Gauge: 1,435 mm
Length over buffers: 17,237 mm
Height: 4,550 mm
Overall wheelbase: 14,070 mm
Empty weight: 81 t
Service weight: 110.0 t
Adhesive weight: 51.1 t
Axle load: 17.3 t
Top speed: 100 km/h
Indicated Power: 868 kW
Driving wheel diameter: 1,750 mm
Leading wheel diameter: 1,000 mm
Trailing wheel diameter: 1,000 mm
Valve gear: Walschaerts (Heusinger)
Cylinder bore: 575 mm
Piston stroke: 630 mm
Boiler Overpressure: 12 bar
No. of heating tubes: 123
No. of smoke tubes: 26
Heating tube length: 4,700 mm
Grate area: 2.58 m²
Superheater area: 58.90 m²
Evaporative heating area: 143.28 m²
Water capacity: 17 m³
Fuel: 5 t
Brakes: Compressed-air brake

The two German steam locomotives of DB Class 78.10, operated by the Deutsche Bundesbahn, were rebuilds based on two Prussian P 8 engines which were converted by the firm of Krauss-Maffei and the Minden repair shop. The aim was to improve the acceleration performance of the vehicles, especially for duties on suburban lines and city (Stadtbahn) lines.

The running gear, drive and boilers of both locomotives, which originally had the running numbers 38 2919 and 38 2990, remained virtually unchanged. The driver's cab was redesigned. A short tender was added which was coupled to the engine with a shaft and improved the riding qualities when running in reverse. The locomotives were classed as tank engines and initially worked in the Munich area, later in Augsburg and finally by Lake Constance. They remained the only ones of their type and were retired as early as 1961.

Neither of the two DB Class 78.10 locomotives has been preserved.

External links

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Deutsche Bundesbahn (DB) Neubaulok classes
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Deutsche Bundesbahn (DB) Umbaulok (rebuild) classes
78.10
Deutsche Reichsbahn (DR) Neubaulok classes
23.10  · 25.10  · 50.40  · 65.10  · 83.10  · 99.23-24  · 99.77-79
Deutsche Reichsbahn (DR) Rekolok classes
01.5  · 03.10 Reko  · 22  · 41 Reko  · 50.35-37  · 52.80  · 58.30
Deutsche Reichsbahn-Gesellschaft (DRG) classes

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