DR Class 83.10

DR Class 83.10
Number(s) DR 83 1001 – 82 1027
Quantity 27
Manufacturer Lokomotivbau Karl Marx Babelsberg
Year(s) of manufacture 1955–1956
Retired 1972
Wheel arrangement 2-8-4T
Axle arrangement 1′D2′ h2t
Type Gt 55.18
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 15,000 mm (49 ft 2 1⁄2 in)
Height 4,250 mm (13 ft 11 5⁄16 in)
Wheelbase 4,500 mm (14 ft 9 1⁄4 in)
Overall wheelbase 11,000 mm (36 ft 1 in)
Empty weight 70.9 tonnes (69.8 long tons; 78.2 short tons)
Service weight 99.75 tonnes (98.17 long tons; 109.96 short tons)
Adhesive weight 59.5 tonnes (58.6 long tons; 65.6 short tons)
Axle load 15.0 tonnes (14.8 long tons; 16.5 short tons)
Top speed 60 km/h (37 mph) both directions
Indicated Power 794 kW (1,080 PS; 1,065 hp)
Driving wheel diameter 1,250 mm (4 ft 1 1⁄4 in)
Leading wheel diameter 850 mm (2 ft 9 1⁄2 in)
Trailing wheel diameter 850 mm (2 ft 9 1⁄2 in)
No. of cylinders Two
Cylinder bore 500 mm (19 11⁄16 in)
Piston stroke 660 mm (26 in)
Boiler Overpressure 14 bar (1.4 MPa; 200 psi)
No. of heating tubes 124
No. of smoke tubes 24
Heating tube length 3,800 mm (12 ft 5 1⁄2 in)
Grate area 2.50 m2 (26.9 sq ft)
Radiative heating area 12.16 m2 (130.9 sq ft)
Tube heating area 94.02 m2 (1,012.0 sq ft)
Superheater area 39.25 m2 (422.5 sq ft)
Evaporative heating area 106.16 m2 (1,142.7 sq ft)
Water capacity 14 m3 (490 cu ft) or 14,000 litres (3,100 imp gal; 3,700 US gal)
Fuel Coal: 8 tonnes (7.9 long tons; 8.8 short tons)

The DR Class 83.10 was a newly designed (Neubaulok) steam locomotive built for the Deutsche Reichsbahn in East Germany after the Second World War and was introduced into service in 1955 and 1956.

The 83.10 was intended for duties on branch lines where a top speed of 60 km/h and a driving wheel diameter of 1,250 mm was sufficient. The carrying wheels and first coupled wheels worked together in a Krauss-Helmholtz bogie. The design of the Class 83.10 was based on the DR Class 65.10. The engines were fitted with superheated steam regulators, mixer-preheaters, distributed sandboxes and plate frames. They could haul a train load of up to 1,000 tonnes at 60 km/h on the level.

After the delivery of the first locomotive in 1955 the engine was fully tested at the VES-M Halle trials depot. The various tests showed numerous shortcomings, that could not all be resolved on the production models. Several problems were able to be rectified in the course of subsequent modifications. The locomotive was never really convincing and, in the light of the looming changeover to diesel operations, only 27 examples were eventually built. It remains therefore relatively unknown. One area of operations was the Arnstadt–Saalfeld line.

In 1972 the last two machines, numbers 83 1025 and 83 1027 were retired. No examples of this class have been preserved.

See also

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