DRG Class 87

The German Class 87 was a standard (see Einheitsdampflokomotive) goods train tank locomotive with the Deutsche Reichsbahn-Gesellschaft (DRG). It was specifically designed by the firm of Orenstein & Koppel for use in Hamburg Harbour. The harbour lines had minimal curve radii of only 100 metres (330 ft) and high train loads to be moved. The axle load had to be no more than 17.5 tonnes (17.2 long tons; 19.3 short tons). These requirements resulted in an axle count of five axles. In order to keep wear and tear on the running gear within acceptable limits only the middle three wheelsets were linked by coupling rods, the two Luttermöller outside axles were driven by cogs.

DRG Class 87
Number(s)DRG 87 001 – 87 016
Quantity16
ManufacturerOrenstein & Koppel
Year(s) of manufacture1927–1928
Retired1951–1956
Wheel arrangement0-10-0T
Axle arrangementE h2t
TypeGt 55.17
Track gauge1,435 mm (4 ft 8 12 in)
Length over buffers13,300 mm (43 ft 7 12 in)
Empty weight68 tonnes (67 long tons; 75 short tons)
Service weight85.6 tonnes (84.2 long tons; 94.4 short tons)
Adhesive weight85.6 tonnes (84.2 long tons; 94.4 short tons)
Axle load17.4 tonnes (17.1 long tons; 19.2 short tons)
Top speed45 km/h (28 mph)
Indicated Power691 kW (939 PS; 927 hp)
Driving wheel diameter1,100 mm (3 ft 7 14 in)
No. of cylindersTwo
Cylinder bore600 mm (23 58 in)
Piston stroke550 mm (21 58 in)
Boiler Overpressure14 bar (1.40 MPa; 203 psi)
No. of heating tubes110
No. of smoke tubes26
Heating tube length4,500 mm (14 ft 9 14 in)
Grate area2.39 m2 (25.7 sq ft)
Radiative heating area10 m2 (110 sq ft)
Tube heating area107.27 m2 (1,154.6 sq ft)
Superheater area47.00 m2 (505.9 sq ft)
Evaporative heating area117.37 m2 (1,263.4 sq ft)
Water capacity9 m3 (320 cu ft) pr 9,000 litres (2,000 imp gal; 2,400 US gal)
FuelCoal: 3 tonnes (3.0 long tons; 3.3 short tons)

Due to damage the vehicles were partly also operated as 1′D, D1′ or 1′C1′ engines.

From 1951 they were superseded by DB Class 82 locomotives.

See also

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.