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German Reichsbahn class 710
Germany | 1934 | 6 produced
71 001 built by Schwartzkopff
71 001 built by Schwartzkopff
Die Lokomotive, June 1935

Under the class 71, the Reichsbahn combined a number of tank locomotives of the Länderbahnen with the wheel arrangement 2-4-2T for light and fast passenger trains. To replace these locomotives, the 710 was redeveloped as a standard locomotive in the 1930s. Instead of series production, however, there were a total of six pre-production models from Schwarzkopff, Borsig and Krupp.

The most striking feature was the symmetrical chassis, which allowed running at top speed in both directions and had a long wheelbase between the two driven axles. Since it was partly planned to replace railcars with this locomotive, it was designed for one-man operation. In return, it received a stoker for automatic grate loading, which made the heater superfluous. As with other standard locomotives, a boiler pressure of 20 bars was initially used, but this was later reduced to 16 bars due to fatigue in the steel alloy St 47 K.

All six locomotives survived the war and then came to the Bundesbahn. However, it was a small class by number which, despite the standard design, was difficult to maintain and could not be planned into operation on a large scale. So they were retired in 1956 and none are left today.

Variant71 001-004 as built71 001-004 reduced boiler pressure71 005-006 as built71 005-006 reduced boiler pressure
General
Built19341936
ManufacturerBMAGBorsig, Krupp
Axle config2-4-2T (Columbia) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length39 ft 0 1/2 in38 ft 8 9/16 in
Wheelbase27 ft 6 11/16 in
Fixed wheelbase9 ft 10 1/8 in
Service weight129,191 lbs
Adhesive weight66,139 lbs
Axle load33,069 lbs
Water capacity1,849 us gal
Fuel capacity6,614 lbs (coal)
Power
Power sourcesteam
Indicated power562 hp (419 kW)562 hp (419 kW)
Estimated power671 hp (500 kW)671 hp (500 kW)
Optimal speed26 mph28 mph25 mph26 mph
Top speed56 mph62 mph
Starting effort16,162 lbf12,931 lbf17,169 lbf13,736 lbf
Power Plant
Driver diameter59.1 in63 in
Boiler pressure290 psi232 psi290 psi232 psi
Expansion typesimple
Cylinderstwo, 12 3/16 x 26 intwo, 13 x 26 in
Boiler
Grate area14.7 sq ft14.9 sq ft
Firebox area59.2 sq ft
Tube heating area725.8 sq ft729.3 sq ft
Evaporative heating area785 sq ft788.5 sq ft
Superheater area307.8 sq ft
Total heating area1,092.9 sq ft1,096.3 sq ft
Calculated Values
steam locomotive
tank locomotive
passenger
last changed: 01/2022
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