Russian locomotive class O

The Russian locomotive class O (from Russian: Основной) was an early type of Russian steam locomotives. 9,129 locomotives were built between 1890 and 1928; hence it was the second most numerous class of locomotive in Russia, after E class,^[1] which was a unique number even on the international level.

Basic variants were early O^d and O^D (Russian: О^д, O^Д) with Joy valve gear and most numerous later O^V (O^В) with Walschaerts valve gear. Some locomotives were built as two cylinder simple expansion and others as two cylinder compounds.^[2]

During 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 due to rugged construction and low silhouette. Relatively lightweight, these locomotives could carry more armor without overloading the track.

• A model of a Soviet Armoured train in the Museum of the Moscow Railway at Paveletsky Rail Terminal in Moscow. It composes one Armoured Russian Locomotive Class O.
  A model of a Soviet Armoured train in the Museum of the Moscow Railway at Paveletsky Rail Terminal in Moscow. It composes one Armoured Russian Locomotive Class O.
• 0-8-0 Armoured locomotive Ov 5067 at the Central Armed Forces Museum, Moscow
  0-8-0 Armoured locomotive Ov 5067 at the Central Armed Forces Museum, Moscow
• Ov 7024 Moskva-Ryazanskaya, Sortirovochnaya depot, Moscow, an 0-8-0
  Ov 7024 Moskva-Ryazanskaya, Sortirovochnaya depot, Moscow, an 0-8-0
• Locomotive OD class the 100th manufactured at Krasnoye Sormovo in 1899
  Locomotive OD class the 100th manufactured at Krasnoye Sormovo in 1899
• Steam locomotive Ok (Od) on the Estonian Railway circa 1920
  Steam locomotive Ok (Od) on the Estonian Railway circa 1920
• Soviet armoured train No.2 "Yuzhnouralskiy Zheleznodorozhnik" (South-Ural Railroad Man), of 38th Armoured Train Unit, Briansk front, abandoned at Marmyzhi 29 June 1942 (OB-3 type)
  Soviet armoured train No.2 "Yuzhnouralskiy Zheleznodorozhnik" (South-Ural Railroad Man), of 38th Armoured Train Unit, Briansk front, abandoned at Marmyzhi 29 June 1942 (OB-3 type)
• Od-1080 at the Russian Railway Museum, Saint Petersburg
  Od-1080 at the Russian Railway Museum, Saint Petersburg
• Ov 6640 at Varshavsky Rail Terminal, St. Petersburg
  Ov 6640 at Varshavsky Rail Terminal, St. Petersburg
• Od 716 of Chinese Eastern Railway
  Od 716 of Chinese Eastern Railway

• The Museum of the Moscow Railway, at Paveletsky Rail Terminal, Moscow
• Rizhsky Rail Terminal, Moscow, Home of the Moscow Railway Museum
• Russian Railway Museum, Saint Petersburg
• Finland Station, St.Petersburg
• History of rail transport in Russia

• The Moscow Railway Museum at Rizhsky Rail Terminal
• Report on a visit to the Varshavsky Rail Terminal

• Railway locomotives introduced in 1890
• Steam locomotives of the Soviet Union
• 0-8-0 locomotives
• Steam locomotives of the Russian Empire
• 5 ft gauge locomotives

• CS1 maint: location missing publisher
• CS1 Russian-language sources (ru)
• Articles needing additional references from December 2014
• All articles needing additional references
• Articles containing Russian-language text
• Commons category link is on Wikidata