Russian locomotive class O

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O class steam locomotive
Ov 841 muzey.jpg
Preserved steam locomotive Ov-841 at the Moscow Railway museum, Rizhsky Rail Terminal
Type and origin
Power type Steam
Build date 1890–1915, 1925–1928
 • Whyte 0-8-0
Gauge 1,524 mm (5 ft)
Driver dia. 1,200 mm (47.24 in)
Length 9.672 m (31 ft 8 34 in), w/o tender
Loco weight Engine only: 52 to 55 long tons (53 to 56 t; 58 to 62 short tons)
Fuel type Coal
 • Firegrate area
1.85 m2 (19.9 sq ft)
Boiler pressure Various,
from: 11 kgf/cm2 (1.08 MPa; 156 psi)
to: 15 kgf/cm2 (1.47 MPa; 213 psi)
Cylinders Two, outside
Cylinder size Simple:
500 mm × 650 mm (19.69 in × 25.59 in)
hp: 500 mm × 650 mm (19.69 in × 25.59 in)
lp: 730 mm × 650 mm (28.74 in × 25.59 in)
Class О

The Russian steam locomotive class O (from Russian: Основной) was an early type of Russian steam locomotives. Between 1890 and 1928, 9129 locomotives were built; hence it was second most numerous locomotive class in Russia, after E class,[1] what was unique number also in the world's scale.


Basic variants were early Od and OD (Russian: Од, OД) with Joy valve gear and most numerous later OV (OВ) with Walschaerts valve gear. Some locomotives were built as two cylinder simple expansion and others as two cylinder compounds.[2]

Armoured locomotives[edit]

In World War I, the Russian civil war and the Eastern Front of World War II O-class locomotives were widely used as standard armoured locomotives in armoured trains.


The Class O locomotive was also included in the Rails of War Mod for Minecraft. It only comes with no armor, and a black paint-scheme(you can change it with dye), and is the biggest and fastest loco in the mod, with chuffing sounds, and a 5-chime steam whistle, and it goes well with the other engines: B-2023, an 0-6-0, and the Cherepanov loco.


See also[edit]


  1. ^ Rakov, V.A. (1995). Lokomotivy otechestvennyh zheleznyh dorog 1845-1955 (in Russian). Moscow. pp. 152 and 190. ISBN 5-277-00821-7. 
  2. ^ Le Fleming, H.M.; Price, J.H. (1960). Russian Steam Locomotives. London: John Marshbank Ltd. pp. 34–35. 

External links[edit]