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The reference for locomotives and railcars

German Reichsbahn class 87

Germany 1927 16 produced
87 008 in 1928 in Hamburg-Wilhelmsburg Werner Hubert PD

Since the port of Hamburg was significantly lower than the Reichsbahn facilities, Orenstein & Koppel were ordered to build a powerful tank locomotive in 1927. With a maximum axle load of 17.5 tonnes, five coupled axles were required for the required traction, while curves with a radius of 100 meters had to be negotiated. A total of 16 were met into service as class 87.

With the locomotive developed in this way, only the inner three axles were connected with coupling rods. The first and last axles were designed as Luttermöller axles, i.e. they could be moved sideways and were driven by gears. When the Luttermöller drives failed, the locomotives continued to be used with the wheel arrangement 2-8-0T, 0-8-2T or 2-6-2T.

The locomotives could pull 1,510 tonnes at 45 km/h and 2,250 tonnes at 35 km/h on the level. At one percent, it was still 1,120 tonnes at 15 km/h. The area of operation remained in Hamburg over their entire service life. They were replaced from 1951 by the class 82, which also was ten-coupled but was simpler in design. The last example was scrapped in 1961.

Technical data

General

Built
1927-1928
Manufacturers
O&K
Wheel arrangement
0-10-0T (Ten-coupled)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
13.30 m
Wheelbase
6.20 m
Empty mass
68 t
Service mass
85.6 t
Adhesion mass
85.6 t
Rigid wheelbase
3.40 m
Axle load
17.4 t
Water capacity
9,000 l
Fuel capacity
3 t (coal)

Boiler

Grate area
2.39 m²
Firebox surface
10 m²
Tube heating surface
107.37 m²
Evaporative heating surface
117.37 m²
Superheater surface
47 m²
Total heating surface
164.4 m²

Power plant

Driver diameter
1,100 mm
Boiler pressure
14 bar
Expansion type
simple expansion
Cylinders
two, 600 x 550 mm

Power

Power source
steam
Indicated power
691 kW (939 PS)
Top speed
45 km/h
Starting effort
214.2 kN

Calculated values

Factor of adhesion
1 : 3.92
Optimal speed
19 km/h
Power-to-weight ratio
8.1 kW/t
Heating Surface Equivalent
261.4 m²
Cylinder volume/HSE
1 : 1,189.95
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 27.22
Grate area/Heating surface
1 : 68.77
Firebox/Tube surface
1 : 10.74
Total/Superheater
1 : 2.50
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