DB Class 78.10

DB Class 78.10
Type and origin Builder Krauss-Maffei Build date 1951 Total produced 2
Specifications Configuration: ​  • Whyte 4-6-4T  • UIC 2'C2' Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1,000 mm Driver dia. 1,750 mm Trailing dia. 1,000 mm Wheelbase: ​  • Overall 14,070 mm Length: ​  • Over buffers 17,237 mm Height 4,550 mm Axle load 17.3 t Adhesive weight 51.1 t Empty weight 81 t Service weight 110.0 t Fuel capacity 5 t Water cap. 17 m³ Firebox: ​  • Grate area 2.58 m² Boiler: ​  • Small tubes 123  • Large tubes 26 Heating tube length 4,700 mm Boiler pressure 12 bar Heating surface 143.28 m² Superheater: ​  • Heating area 58.90 m² Cylinder size 575 mm Piston stroke 630 mm Valve gear Walschaerts (Heusinger) Loco brake Compressed-air brake
Performance figures Maximum speed 100 km/h Indicated power 868 kW
Career Numbers DB 78 1001–1002 Retired 1961

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

• There is a relevant English-language forum at Railways of Germany