G 8.1 (Prussia, Mecklenburg, Alsace-Lorraine)
DRG Class 55.25–56, 55.58
DB Class 055
PKP Tp4
SNCB Type 81
SJ Class G |
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| Type and origin |
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| Builder | |
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| Build date | 1913–1921 |
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| Total produced | 5,155 |
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| Specifications |
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| Gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
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| Driver dia. | 1,350 mm (53.15 in) |
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Length:
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| • Over beams | 18,290 mm (60 ft 1⁄8 in) |
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| Axle load | 17.6 t (17.3 long tons; 19.4 short tons) |
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| Adhesive weight | 69.9 t (68.8 long tons; 77.1 short tons) |
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| Service weight | 69.9 t (68.8 long tons; 77.1 short tons) |
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| Water cap. | 16.5 m3 (580 cu ft)/20.0 m3 (710 cu ft)/21.5 m3 (760 cu ft) |
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| Boiler pressure | 14 bar (1,400 kPa; 200 psi) |
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| Heating surface: | |
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| • Firebox | 2.58 m2 (27.8 sq ft) |
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| • Evaporative | 143.28 m2 (1,542.3 sq ft) |
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| Cylinders | 2 |
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| Cylinder size | 600 mm (23.62 in) |
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| Piston stroke | 660 mm (25.98 in) |
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| Performance figures |
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| Maximum speed | 55 km/h (34 mph) |
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| Indicated power | 927 kW (1,243 hp) |
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| Career |
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| Numbers | DRG 55 2501–3366, 3368–5665, 5801–5810, 5851–5852
DR 55 5898, 7251–7260, 8170 |
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| Retired | 1973 |
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The Prussian G 8.1 was steam locomotive operated by the Prussian state railways. It was a heavier, stronger development of the G 8 and was initially referred to as a 'strengthened standard class' (Verstärkte Normalbauart).
