DR Class 65.10

DR Class 65.10
65 1049 of Deutsche Reichsbahn
Number(s)	DR 65 1001–1088
Quantity	88 DR
Manufacturer	LEW (Prototypes) LKM (Production)
Year(s) of manufacture	1954–1957
Retired	1977
Wheel arrangement	2-8-4
Axle arrangement	1'D2'
Type	Pt 47.18
Track gauge	1,435 mm (4 ft 8 1⁄2 in)
Length over buffers	17,500 mm
Service weight	113.0 t
Adhesive weight	71.0 t
Axle load	17.5 t
Top speed	fwds + bwds 90 km/h
Indicated Power	1,103
Driving wheel diameter	1,600 mm
Leading wheel diameter	1,000 mm
Trailing wheel diameter	1,000 mm
Cylinder bore	660 mm
Piston stroke	600 mm
Boiler Overpressure	16 bar
Grate area	2.04 m2
Superheater area	47.39 m2
Evaporative heating area	147.44 m2

The DR Class 65.10 was a four-coupled passenger train tank engine operated by the East German Deutsche Reichsbahn (DR) for heavy suburban and commuter services.

Like the DB Class 65 built for the Deutsche Bundesbahn in West Germany, the DR Class 65.10 was intended by the Deutsche Reichsbahn (DR) in East Germany for commuter traffic on suburban railways. The DR procured a total of 88 examples of this class, and 7 more went to the Leuna chemical works.

The Class 65.10 was developed after the Second World War as a powerful tank locomotive that would replace engines of classes 74, 75, 78, 86, 93 and 94.

Numbers 1001 and 1002 were built at VEB Lokomotivbau Elektrotechnische Werke (LEW), formerly Borsig Lokomotiv Werke (AEG), Hennigsdorf, and the production models at VEB Lokomotivbau Karl Marx, (LKM, formerly Orenstein & Koppel) Babelsberg.

The vehicles had a welded locomotive frame, a welded boiler and mixer-preheater and large tanks in order to carry additional fuel (primarily brown coal bricketts). On the Class 65.10 the two axles of the rear bogie were housed in an outer frame unlike those of their DB Class 65 counterparts.