Russian locomotive class IS

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Soviet locomotive class ИС
Steam locomotive IS20-317.jpg
Locomotive ИС20-317, c. 1935
Type and origin
Power type Steam
Total produced 649
Configuration 2-8-4
Gauge 1,524 mm (5 ft)
Leading dia. 1,050 mm (41.34 in)
Driver dia. 1,850 mm (72.83 in)
Trailing dia. 1,050 mm (41.34 in)
Adhesive weight 88 tonnes (87 long tons; 97 short tons)
Loco weight 133 tonnes (131 long tons; 147 short tons)
 • Firegrate area
7.04 m2 (75.8 sq ft)
Boiler pressure 15 kgf/cm2 (1.47 MPa; 213 psi)
Heating surface 295.2 m2 (3,178 sq ft)
 • Heating area 148.4 m2 (1,597 sq ft)
Cylinders Two, outside
Cylinder size 670 mm × 770 mm (26.38 in × 30.31 in)
Performance figures
Maximum speed 115 km/h (71 mph)
Tractive effort 233.5 kN (52,490 lbf)
Steam locomotive of series IS with streamline casing Woroshilovograds factory, the Soviet steam locomotive-champion with maximum speed of 180 km/h (110 mph)

The Soviet locomotive class IS (Russian: ИС) was a Soviet passenger steam locomotive type. The contract design was prepared in 1929 at the Kolomna factory. The ИС were manufactured between 1932 and 1942. They were named after Joseph Stalin (Russian: Иосиф Сталин).


The steam locomotive was a 2-8-4. The locomotive used the same cylinders and boilers as the ФД (FD) series locomotives. However the ИС steam locomotive had a different wheel arrangement.


The first steam locomotive was released from the Kolomna factory on October 4, 1932. In April–December a steam locomotive was tested on the October-, Southern- and Ekaterinenskaya railways.

In 1936 production began at the Voroshilovograd factory. In total, 649 steam locomotives were constructed. Later it was renamed FDP (steam locomotive FD, passenger modification).


These locomotives were used until 1972.


See also[edit]


  • Главное управление локомотивного хозяйства МПС (1956). Справочник по локомотивам железных дорог СССР (in Russian). Трансжелдориздат. 
  • Сыромятникова, С.П., ed. (1937). Курс паровозов. Устройство и работа паровозов и техника их ремонта (in Russian). Трансжелдориздат (State Publishing House). 


External links[edit]