The reference for locomotives and railcars
German Federal Railway class 66
Germany | 1955 | 3 produced
66 002 in September 1982 in Bochum-Dahlhausen
66 002 in September 1982 in Bochum-Dahlhausen

The class 66 tank locomotive was developed as one of the last new-build steam locomotives on the Bundesbahn, of which only two were built in 1955. In its basic design, it corresponded to the class 65, but was smaller and had one less coupled axle. In addition, it had a lower axle load for use on secondary lines and at the same time a larger coupling wheel diameter in order to still be able to reach 100 km/h. On the one hand, it was intended to replace old passenger locomotives such as the Prussian P 8 and T 18, but also freight locomotives such as the T 14. With a combustion chamber boiler, roller bearings and a direct-contact feed water heater, they corresponded to the current state of development. In addition, welding technology was consistently used in their production and the comfort of the crew was also taken into account when setting up the driver's cab.

Since the first mainline diesel locomotives suitable for operation on branch lines were ready for use at this time, no further units of the class 66 were built. The two existing engines were soon equipped with push-pull train controls and were mainly used for passenger transport. A third, almost identical locomotive was delivered to the Mülheim Ruhr Valley Railway in 1959. The Bundesbahn later took it over as road number 66 6006. The two examples originally built for the Bundesbahn were retired in 1967 and 1968 and today road number 66 002 can be viewed in the Bochum-Dahlhausen Railway Museum. In a contribution by Ulrich Budde in the forum “Drehscheibe Online” it is credibly described that the latter is actually 66 6006, which was subsequently given the other number.

Axle config2-6-4T (Adriatic) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length48 ft 4 11/16 in
Wheelbase36 ft 3 1/16 in
Fixed wheelbase12 ft 1 11/16 in
Empty weight153,882 lbs
Service weight207,014 lbs
Adhesive weight103,838 lbs
Axle load34,833 lbs
Water capacity3,698 us gal
Fuel capacity11,023 lbs (coal)
Power sourcesteam
Indicated power1,155 hp (861 kW)
Optimal speed26 mph
Top speed62 mph
Starting effort27,864 lbf
Power Plant
Driver diameter63 in
Boiler pressure232 psi
Expansion typesimple
Cylinderstwo, 18 1/2 x 26 in
Grate area21.1 sq ft
Firebox area122.7 sq ft
Tube heating area818.8 sq ft
Evaporative heating area941.5 sq ft
Superheater area485.8 sq ft
Total heating area1,427.3 sq ft
Calculated Values
steam locomotive
tank locomotive
last changed: 01/2022

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