Prussian P 8

Specifications
Specifications
Configuration:;
• Whyte	4-6-0
• German	P 35.15
Gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge; 1,524 mm (5 ft) Russian Railways
Leading dia.	1,000 mm (39.37 in)
Driver dia.	1,750 mm (68.90 in)
Length:;
• Over beams	18,585 mm (60 ft 11+3⁄4 in)
Axle load	17.36 t (17.09 long tons; 19.14 short tons)
Adhesive weight	50.60 t (49.80 long tons; 55.78 short tons)
Service weight	69–76.69 t (67.91–75.48 long tons; 76.06–84.54 short tons)
Boiler pressure	12 bar (1,200 kPa; 170 psi)
Heating surface:
• Firebox	2.58 m2 (27.8 sq ft)
• Radiative	14.58 m2 (156.9 sq ft)
• Evaporative	143.28 m2 (1,542.3 sq ft)
Superheater:;
• Heating area	58.90 m2 (634.0 sq ft)
Cylinder size	575 mm (22.64 in)
Piston stroke	630 mm (24.80 in)
Train heating	Steam from locomotive boiler
Loco brake	Knorr automatic, single-chamber compressed-air brakes, working both sides of the coupled wheels, from 1913 bogie wheels also braked

Prussian P 8
DRG Class 38.10–40
Prussian P 8 ; DRG Class 38.10–40
	Prussian P 8 in state railway livery
Build date
Type and origin
Build date	1908 - 1926
Total produced	ca. 3,700
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0
• German	P 35.15
Gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge; 1,524 mm (5 ft) Russian Railways
Leading dia.	1,000 mm (39.37 in)
Driver dia.	1,750 mm (68.90 in)
Length:;
• Over beams	18,585 mm (60 ft 11+3⁄4 in)
Axle load	17.36 t (17.09 long tons; 19.14 short tons)
Adhesive weight	50.60 t (49.80 long tons; 55.78 short tons)
Service weight	69–76.69 t (67.91–75.48 long tons; 76.06–84.54 short tons)
Boiler pressure	12 bar (1,200 kPa; 170 psi)
Heating surface:
• Firebox	2.58 m2 (27.8 sq ft)
• Radiative	14.58 m2 (156.9 sq ft)
• Evaporative	143.28 m2 (1,542.3 sq ft)
Superheater:;
• Heating area	58.90 m2 (634.0 sq ft)
Cylinder size	575 mm (22.64 in)
Piston stroke	630 mm (24.80 in)
Train heating	Steam from locomotive boiler
Loco brake	Knorr automatic, single-chamber compressed-air brakes, working both sides of the coupled wheels, from 1913 bogie wheels also braked
Maximum speed
Performance figures
Maximum speed	110 km/h (68 mph) (forwards); 50 km/h (31 mph) (backwards); 85 km/h (53 mph) (backwards with tub tender)
Indicated power	868 kW (1,164 hp)
Retired
Career
Retired	1974

The Prussian Class P 8 of the Prussian state railways (DRG Class 38.10-40 of the Deutsche Reichsbahn) was a 4-6-0 steam locomotive built from 1906 to 1923 by the Berliner Maschinenbau (previously Schwartzkopff) and twelve other German factories. The design was created by Robert Garbe. It was intended as a successor to the Prussian P 6, which was regarded as unsatisfactory.

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