The reference for locomotives and railcars


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Imperial Russian Railways series Р
Russia | 1899 | 477 produced
archive CMZhT

In order to speed up freight trains, the series Р (R) was developed with a 2-8-0 wheel arrangement to replace the existing 0-8-0 locomotives. The special feature was the tandem compound engine, in which the high and low pressure cylinders were located one behind the other on both sides. This saved the need for a cranked axle, but the special arrangement of the cylinders meant that there was a lot of maintenance work. Since the speed was soon no longer sufficient on flat land lines and more powerful locomotives were available on mountain lines, the locomotives were only used on industrial railways from around 1940.

Built1899-1903, 1905-1911
ManufacturerBrjansk, Putilow, Grafenstaden, Sormowo, Kolomna
Axle config2-8-0 (Consolidation) 
Gauge4 ft 11 13/16 in (Russian broad gauge)
Dimensions and Weights
Length loco34 ft 3 7/16 in
Empty weight122,356 lbs
Service weight134,482 lbs
Adhesive weight119,049 lbs
Axle load29,211 lbs
Water capacity3,963 us gal
Fuel capacity11,023 lbs (coal)
Power sourcesteam
Estimated power872 hp (650 kW)
Optimal speed22 mph
Top speed31 mph
Starting effort24,774 lbf
with start valve29,729 lbf
Power Plant
Driver diameter48.4 in
Boiler pressure174 psi
Expansion typecompound
Cylindersfour, HP: 15 3/4 x 23 5/8 in
and LP: 23 5/8 x 23 5/8 in
Grate area27.3 sq ft
Evaporative heating area1,674.9 sq ft
Total heating area1,674.9 sq ft
Calculated Values
steam locomotive
tandem compound
last changed: 03/2023

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