Exhibit description

Freight Steam Locomotive О^к 5294

History of the development

About the locomotive series

In 1892, the term "normal steam locomotive" or "normal steam locomotive" appeared on Russian railways, meaning a standardized locomotive that met certain standards. Early normal steam locomotives, of the 1892, 1893, and 1897 types, had four driving wheel pairs (0-4-0 axle arrangement), a Joye steam distribution mechanism, and a compound engine—a type in which steam first enters the high-pressure (right) cylinder, which has a smaller diameter, and then, after working there, enters the low-pressure (left) cylinder, which has a larger diameter. It was assumed that reducing the temperature difference in the cylinders during the power stroke and, consequently, reducing heat loss during steam condensation would save fuel—this is the principle behind the compound engine. Yet, despite their many advantages, "normal type" steam locomotives with Joy's steam distribution demonstrated poor fuel efficiency, consuming more fuel per unit of work performed than their predecessors, which, despite a similar design, had a simple steam engine (with identical cylinders) and a more archaic steam distribution system with a rocker mechanism inside the frame.

Tests of "normal type 1897" steam locomotives, conducted from 1898 to 1900 on the Kharkov-Mykolaiv Railway, revealed unsatisfactory steam distribution on these locomotives. Therefore, engineer Yu.V. Lomonosov proposed a project to redesign their steam distribution mechanism. However, subsequent tests of the redesigned locomotives demonstrated the inadequacy of this measure.

In 1900, the Kolomna Machine-Building Plant built two steam locomotives (factory type 66) for the Southwestern Railways with a Walschaert steam distribution mechanism, modified by the plant to reduce stone play in the gear linkage. Their design also included other changes, including a smaller heating surface and an increased cylinder diameter, which led to a mismatch between the boiler and the engine. Although the first 0-4-0 locomotives with the Walschaert mechanism were unsuccessful, this did not apply to their steam distribution system.

The following year, in 1901, the 23rd Consultative Congress of Traction Service Engineers developed a list of measures aimed at improving the existing steam locomotive "normal type 1897." These measures included replacing Joy's steam distribution systems with Walschaert mechanisms, replacing Ramsbottom's safety valves with lever-and-spring valves, and using four-axle tenders designed by the Kharkov plant alongside three-axle tenders. That same year, the Putilov plant began producing locomotives in accordance with the congress's decisions. These locomotives became known as the "Normal Type 1901" locomotives.

The "Normal Type 1904" locomotives differed from the "Normal Type 1901" locomotives in several ways, including increasing the boiler steam pressure from 11.5 to 12 kgf/cm2.

From 1903 to 1907, the Kolomensky Plant built steam locomotives (factory type 89) similar to standard locomotives (factory type 88), but with a steam distribution mechanism modified similarly to that of the factory type 66.

The changes made by the Kolomensky Plant to the steam distribution system did not directly affect the Walschaert linkage. The mechanism for driving the linkage rocker was modified. Instead of the previously used drive from the reverser transfer shaft via rods, a method using a sliding clutch was used, which was expected to reduce the rocker's play relative to the linkage during locomotive movement.

Subsequently, a similar mechanism was used only once on domestic steam locomotives, namely on the 9P series industrial tank locomotives, also developed by the Kolomensky Plant, which began mass production in 1936. Increased traffic necessitated, and strengthened tracks allowed, the use of more powerful locomotives than the "normal" 0-4-0 locomotives. Production of the "normal 1905 type" steam locomotives with a 1-4-0 axle arrangement began (in 1912, this series received the designation Щ). After this, orders for 0-4-0 steam locomotives continued, but significantly decreased. Some 0-4-0 steam locomotives from 1907 onward were equipped with superheaters during construction. Furthermore, superheaters began to be installed on previously built "normal" steam locomotives.

In 1912, a unified system for designating locomotive series was established in Russia. According to it, all "normal" locomotives with the 0-4-0 axle arrangement were assigned the O series, from the word "main." Locomotives of the "normal types of 1901 and 1904" with a compound engine and Walschaert's steam distribution mechanism were designated O^B, while locomotives with Walschaert's steam distribution mechanism, modified by the Kolomna Plant, were designated O^K. The indexes indicated the authorship of Walschaert and the Kolomna Plant. For the same reasons, locomotives with Joye's steam distribution mechanism were designated: "normal types of 1892 and 1893" - Od, "normal type of 1897" - Od. — O^D, and those with steam distribution modified at the suggestion of Yu. V. Lomonosov — O^L. 0-4-0 steam locomotives with superheaters received the designation O^P.

When a unified series designation system was introduced, both Type 66 locomotives from the Kolomna plant received the same O^K designation as the "normal" Type 89 locomotives, despite significant differences.

The O^K series steam locomotives not only ensured stable freight transportation throughout the Russian Empire and the early USSR, but also laid the technical foundation for the development of freight and passenger locomotives in the 20th century.

According to the Kolomensky Plant, 334 Type 89 steam locomotives were built. The widely circulated estimate of 265 locomotives does not take into account locomotives built for private roads, nor the fact that some locomotives with Walschaert-type steam distribution mechanisms modified by the Kolomensky Plant were mistakenly recorded by the Railway Administration of the Ministry of Railways as O^B rather than O^K. It is unknown whether locomotives similar to the Kolomensky Plant's Type 89 were built at other plants. As for the O series steam locomotives of all indexes, approximately 8,000 were built. This was the most widely produced series of steam locomotives in the Russian Empire.

Museum specimen

Freight locomotive O^K 5294 with a 4-axle tender of freight locomotive O^P 7583

Steam locomotive with serial number 3735 was built at the Kolomna plant in 1907 as one of 10 locomotives ordered for the Vistula Railways. It was the last batch of Type 89 locomotives.

Steam locomotive O^K 5294 is a valuable monument of domestic steam locomotive construction. To date, no other O^K series steam locomotives remain in our country.

Before the introduction of a unified designation system in 1912, standard steam locomotives with Walschaert steam distribution were designated E on the Vistula Railway. In 1914, the Railway Administration assigned the locomotive the designation O^B 5294. The Administration likely had incomplete information about the technical characteristics of this batch of locomotives. In fact, the locomotive, with its steam distribution modified by the Kolomna Plant, was designated O^K (it is unknown whether this was from 1912 or later), but the number remained within the O^B series.

This locomotive was likely evacuated from the Vistula Railway in 1915, during the so-called Great Retreat. There is no information about its operation between 1915 and 1941. It is known that the locomotive operated at the Polotsk depot of the Western Railway in 1941 and was later captured by advancing German troops. In March 1943, it was captured by the Red Army during the liberation of Rzhev and, on March 31, was registered with the Kalinin Railway as a captured (recaptured) Soviet locomotive. In January 1949, the locomotive was transferred to the Velikiye Luki Locomotive Repair Plant for shunting work, where it remained in use until the second half of the 1960s.

The locomotive is coupled to a tender built by the Kharkov Locomotive Plant. This tender bore the designation O 7583, which belonged to one of the steam locomotives with which it was operated, but it was likely not the first locomotive coupled to this tender after it left the factory. Number 7583 was assigned in 1914 to a locomotive that ran on superheated steam and, accordingly, had the O^P series.

In the 1970s, the locomotive was relocated to the Leningrad-Sortirovochny-Vitebsky depot, where it was used for filming.

The locomotive is owned by the Central Museum of Railway Transport (CMZhT RF), to whose collection it was transferred in 1981 from the Leningrad-Sortirovochny-Vitebsky locomotive depot. At the time of its acquisition, it was located on the premises of the Leningrad-Vitebsky-Sortirovochny locomotive depot TC-9 of the October Railway. From 1982 to 1990, it was kept at the locomotive storage depot at Zelenogorsk station. From 1990 to 2005, it was kept at the Pioneer Park storage depot at Lebyazhye station. After its brief closure in 2005–2008, Steam locomotive O^k 5294 was relocated to the "Steam Locomotive Museum" storage facility of the October Railway Museum at Shushary station, where it remained until mid-2024.

In October and December 2024, the Russian Railway Museum, in collaboration with a contractor, carried out a comprehensive restoration of the locomotive. The locomotive's appearance was restored to that of the early 1930s.