Prussian T 20

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Prussian T 20 DRG Class 95 DR Class 95.0/1
Type and origin Builder Borsig (18) Hanomag (27) Build date 1922–1924 Total produced 45
Specifications  • German Gt 57.19 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 850 mm (2 ft 9+1⁄2 in) Driver dia. 1,400 mm (4 ft 7+1⁄8 in) Trailing dia. 850 mm (2 ft 9+1⁄2 in) Wheelbase: ​  • Overall 11,900 mm (39 ft 1⁄2 in) Length: ​  • Over beams 15,100 mm (49 ft 6+1⁄2 in) Height 4,550 mm (14 ft 11+1⁄8 in) Axle load 19.1 t (18.8 long tons; 21.1 short tons) Adhesive weight 95.3 t (93.8 long tons; 105.1 short tons) Empty weight 103.7 t (102.1 long tons; 114.3 short tons) Service weight 127.4 t (125.4 long tons; 140.4 short tons) Fuel capacity 4 t (3.9 long tons; 4.4 short tons) coal Water cap. 12.0 m3 (2,600 imp gal; 3,200 US gal) Boiler pressure 14 kgf/cm2 (1,370 kPa; 199 psi) Heating surface: ​  • Firebox 4.36 m2 (46.9 sq ft)  • Evaporative 200.00 m2 (2,152.8 sq ft) Superheater: ​  • Heating area 62.50 m2 (672.7 sq ft) Cylinders Two, outside Cylinder size 700 mm (27+9⁄16 in) Piston stroke 660 mm (26 in) Loco brake Knorr compressed-air brake Riggenbach counter-pressure brake
Performance figures Maximum speed 70 km/h (43 mph) Indicated power 1,620 PS (1,190 kW; 1,600 hp)
Career Numbers DRG 95 001 – 95 045 Retired 1978

The German DRG Class 95 are ten-coupled tank locomotives with a 2-10-2 wheel arrangement, which were procured by the Deutsche Reichsbahn (also referred to later as the Deutsche Reichsbahn-Gesellschaft or DRG) in 1922 for hauling heavy goods trains on steep main lines. Because the development of this class was started by the Prussian state railways, it was designated as the Prussian Class T 20.