Prussian G 8

Prussian G 8
DRG Class 55.16–22
ÖBB Class 755
PKP Tp 3
FS Class 422
SNCB Type 80
Prussian G 8, "Mainz "
Type and origin
Builder
Build date1902–1913
Total produced1,054
Specifications
 • GermanG 44.14
Gauge1,435 mm (4 ft 8+12 in) standard gauge
Driver dia.1,350 mm (53.15 in)
Length:
 • Over beams16,938 mm (55 ft 6.9 in) (3 T 12) / 17,968 mm (58 ft 11.4 in) (3 T 16.5)
Axle load14.7 t (14.5 long tons; 16.2 short tons)
Adhesive weight58.5 t (57.6 long tons; 64.5 short tons)
Service weight58.5 t (57.6 long tons; 64.5 short tons)
Water cap.12.0 m3 (2,600 imp gal; 3,200 US gal) / 15.0 m3 (3,300 imp gal; 4,000 US gal) / 16.0 m3 (3,500 imp gal; 4,200 US gal) / 16.5 m3 (3,600 imp gal; 4,400 US gal)
Boiler pressure12 bar (1,200 kPa; 170 psi)
Heating surface:
 • Firebox2.25 m2 (24.2 sq ft) / 2.35 m2 (25.3 sq ft)
 • Evaporative135.2 m2 (1,455 sq ft) / 140.0 m2 (1,507 sq ft)
Superheater:
 • Heating area31.7 m2 (341 sq ft) / 41.2 m2 (443 sq ft)
Cylinder size575 mm (22.64 in) / 590 mm (23.23 in) / 600 mm (23.62 in)
Piston stroke660 mm (25.98 in)
Performance figures
Maximum speed55 km/h (34 mph)
Indicated power809 kW (1,085 hp)
Career
NumbersDRG 55 1601–2268
Retired1969

The Prussian Class G 8 locomotives were eight-coupled, superheated, freight locomotives operated by the Prussian state railways. There were two variants: the G 8 built from 1902 with a 14 tonne axle load and the "reinforced G 8" (verstärkte G 8) built from 1913 (later designated the G 8.1) with a 17-tonne (17-long-ton; 19-short-ton) axle load. The latter was the most numerous German state railway (Länderbahn) locomotive, over 5,000 examples being built.