Steam loco, steam locomotive, 9P 0-6-0 T

Notes: Affectionately known as the Petushok (cockerel), the 9P bears a passing resemblance (albeit with smaller wheels) to the later US Army Transport Corps 0-6-OT produced during the Second World War. Equipped with Walschaerts valve gear, the 9P was built in four basic batches, interrupted by the war: 55 from Kolomna in 1936; 153 from the same factory in 1939-41; a small number from Novocherkassk in 1941; and the remainder from Murom after the war. An interesting change to the number series occurred from 1950 with the inclusion of the last digit of the year of construction: for example, nos 8133 and 14362 were engines 833 of 1951 and 1462 of 1953. A new number series was then used for the 9Pm (modernizirovannyi - modernised), which had a larger bunker and higher rate of steam production, and which was the last steam design in mass production within the USSR. Most of the 9P and 9Pm were supplied for industrial use, especially in the post-war period, though some of these were taken into MPS stock in the 1960's and 1970's. Thus, whereas the 1967 stock was 36 (30 active), the total rose to 62 (49 active) by 1974. However, only 2 were normally working in the winter of 1991 -92. (Technical data is for post-1939 9P engines).