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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From 1951 they were superseded by DB Class 82 locomotives.
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