DRG Class 87

DRG Class 87
87 008
Type and origin Power type Steam Builder Orenstein & Koppel Serial number 11231–11238, 11411–11415, 11551–11553 Build date 1927–1928 Total produced 16
Specifications Configuration: ​  • Whyte 0-10-0T  • UIC E h2t  • German Gt 55.17 Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,100 mm (3 ft 7+1⁄4 in) Wheelbase: ​  • Axle spacing (Asymmetrical) 1,400 mm (4 ft 7+1⁄8 in) + 1,800 mm (5 ft 10+7⁄8 in) + 1,600 mm (5 ft 3 in) + 1,400 mm (4 ft 7+1⁄8 in) =  • Engine 6,200 mm (20 ft 4+1⁄8 in) Length: ​  • Over headstocks 12,000 mm (39 ft 4+1⁄2 in)  • Over buffers 13,300 mm (43 ft 7+5⁄8 in) Height 4,165 mm (13 ft 8 in) Axle load 17.1 t (16.8 long tons; 18.8 short tons) Adhesive weight 85.6 t (84.2 long tons; 94.4 short tons) Empty weight 68.0 t (66.9 long tons; 75.0 short tons) Service weight 85.6 t (84.2 long tons; 94.4 short tons) Fuel type Coal Fuel capacity 3.0 t (3.0 long tons; 3.3 short tons) Water cap. 9 m3 (1,980 imp gal; 2,380 US gal) Firebox: ​  • Grate area 2.34 m2 (25.2 sq ft) Boiler: ​  • Pitch 2,700 mm (8 ft 10+1⁄4 in)  • Tube plates 4,500 mm (14 ft 9+1⁄8 in)  • Small tubes 44.5 mm (1+3⁄4 in), 110 off  • Large tubes 133 mm (5+1⁄4 in), 26 off Boiler pressure 14 bar (14.3 kgf/cm2; 203 psi) Heating surface: ​  • Firebox 10.0 m2 (108 sq ft)  • Tubes 61.4 m2 (661 sq ft)  • Flues 45.9 m2 (494 sq ft)  • Total surface 117.3 m2 (1,263 sq ft) Superheater: ​  • Heating area 47.0 m2 (506 sq ft) Cylinders Two, outside Cylinder size 600 mm × 550 mm (23+5⁄8 in × 21+5⁄8 in)
Performance figures Maximum speed 45 km/h (28 mph) Indicated power 940 PS (691 kW; 927 hp)
Career Operators Deutsche Reichsbahn → Deutsche Bundesbahn Numbers 87 001 – 87 016 Retired 1951–1956

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.

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From 1951 they were superseded by DB Class 82 locomotives.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

• List of DRG locomotives and railbuses

References

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