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T-26 variants
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T-26 variants
More than 50 different modifications and experimental vehicles based on the T-26 light infantry tank chassis were developed in the USSR in the 1930s, with 23 modifications going into series production. The majority were armoured combat vehicles: flame tanks, artillery tractors, radio-controlled tanks (teletanks), military engineering vehicles, self-propelled guns and armoured personnel carriers. They were developed at the Leningrad Factory of Experimental Mechanical Engineering (from 1935 known as the Factory No. 185 named after S.M. Kirov) by talented Soviet engineers P.N. Syachentov, S.A. Ginzburg, L.S. Troyanov, N.V. Tseits, B.A. Andryhevich, M.P. Zigel and others. Many Soviet tank engineers were declared "enemies of the nation" and repressed during Stalin's Great Purge from the middle of the 1930s. As a result, work on self-propelled guns and armoured carriers ceased in the USSR during that time. T-26 light tanks were also modified into armoured combat vehicles in the field during wartime.
Flame-throwing tanks formed around 12 per cent of the series production of T-26 light tanks. It should be mentioned that the abbreviation "OT" (Ognemetniy Tank which stands for Flame-throwing Tank) appeared only in post-war literature; these tanks were originally called "KhT" (Khimicheskiy Tank which stands for Chemical Tank), or BKhM (Boevaya Khimicheskaya Mashina; Fighting Chemical Vehicle) in the documents of the 1930s. All chemical (flame-throwing) tanks based on the T-26 chassis (KhT-26, KhT-130, KhT-133) were designated BKhM-3. The vehicles were intended for area chemical contamination, smoke screens and for flame-throwing.
The TKhP-3 chemical equipment for smoke screens and chemical contamination was developed in 1932. This equipment could be easily installed on any T-26 light tank and was produced by the "Compressor" Factory, (introduced for smoke screening as the TDP-3 from summer 1934; 1,503 such sets were produced to the end of 1936).
Additional variants of the ST-26 (with a sliding system of bridge laying and with a tipping system of bridge laying) were also tested from 1932. The first had a massive guide frame and a special boom (the bridge could be laid in 3 min 20 sec, the raise operation took 6-7 min), while the second was equipped with a special swinging-boom with a rack-and-pinion drive. All three variants of the ST-26 participated in military maneuvers of the Leningrad Military District in the summer of 1933; subsequently series production of the ST-26 with a cable system of bridge laying was begun as it proved to be more reliable and less complicated to maintain. The Defence Committee of the USSR ordered the production of 100 ST-26 to the end of 1933, but only 44 vehicles were assembled by the Factory No. 174 by 1934, and 20 in 1935. The delay was attributed to the manufacture of the metal bridges, carried out by the Gipstalmost Factory and several workshops using semi-handicraft techniques.
Specifications: weight - 9.5–10 tonnes (10.5–11.0 short tons); crew - 2 men (commander and driver); speed - 28 km/h (17 mph); range - 120 km (75 mi).
The Armoured Engineering Section of the Red Army's Research Institute of Engineer Equipment (NIIIT RKKA) in co-operation with the Gipstalmost Factory developed an improved engineer tank at the end of 1936, with a lever hydraulic system of bridge laying (similar to the UST-26, see below) and a small turret of new design. The bridge could be laid in 45 sec and the raise operation took 1.5 min (both processes did not require crew exit). The vehicle was assembled by the Podolsk Machine Factory named after S. Ordzhonikidze in July 1937, and was successfully tested at the NIIIT Proving Ground (85 bridge layings were performed and 70 light tanks passed over the bridge). This ST-26 prototype was also tested at the Kubinka Tank Proving Ground, and participated in military exercises of the Leningrad Military District in 1938. A decision was made in 1939 to produce a batch of engineer tanks with the lever hydraulic system, but the Podolsk Machine Factory could assemble only one. The Stalingrad Tractor Factory probably also produced two such vehicles the same year.
An experimental multispan bridge was developed in 1934 which allowed for the coupling together of three or more ST-26 bridges, using special automatic grips in the end of each bridge section. The multispan bridge employed 250 kg metal columns 2.5 m (8.2 ft) high and was intended for crossings by T-26 and BT light tanks of water obstacles up to 20–50 m (66–164 ft) wide and 3 m (9.8 ft) deep. The launching of each bridge section took 20-30 min. The bridge had no development after testing.
Engineer Alexandrov from the Research and Technology Division of the Red Army's Engineer Directorate (NTO UNI RKKA) developed a wooden tracked bridge 6.5 m (21 ft) long. The bridge was mounted on standard T-26 light tanks as well as on ST-26 engineer tanks and could be laid in 30-60 sec without crew exit. Trials carried out in July–August 1934 were successful and 20 such bridges were issued to the armed forces.
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T-26 variants
More than 50 different modifications and experimental vehicles based on the T-26 light infantry tank chassis were developed in the USSR in the 1930s, with 23 modifications going into series production. The majority were armoured combat vehicles: flame tanks, artillery tractors, radio-controlled tanks (teletanks), military engineering vehicles, self-propelled guns and armoured personnel carriers. They were developed at the Leningrad Factory of Experimental Mechanical Engineering (from 1935 known as the Factory No. 185 named after S.M. Kirov) by talented Soviet engineers P.N. Syachentov, S.A. Ginzburg, L.S. Troyanov, N.V. Tseits, B.A. Andryhevich, M.P. Zigel and others. Many Soviet tank engineers were declared "enemies of the nation" and repressed during Stalin's Great Purge from the middle of the 1930s. As a result, work on self-propelled guns and armoured carriers ceased in the USSR during that time. T-26 light tanks were also modified into armoured combat vehicles in the field during wartime.
Flame-throwing tanks formed around 12 per cent of the series production of T-26 light tanks. It should be mentioned that the abbreviation "OT" (Ognemetniy Tank which stands for Flame-throwing Tank) appeared only in post-war literature; these tanks were originally called "KhT" (Khimicheskiy Tank which stands for Chemical Tank), or BKhM (Boevaya Khimicheskaya Mashina; Fighting Chemical Vehicle) in the documents of the 1930s. All chemical (flame-throwing) tanks based on the T-26 chassis (KhT-26, KhT-130, KhT-133) were designated BKhM-3. The vehicles were intended for area chemical contamination, smoke screens and for flame-throwing.
The TKhP-3 chemical equipment for smoke screens and chemical contamination was developed in 1932. This equipment could be easily installed on any T-26 light tank and was produced by the "Compressor" Factory, (introduced for smoke screening as the TDP-3 from summer 1934; 1,503 such sets were produced to the end of 1936).
Additional variants of the ST-26 (with a sliding system of bridge laying and with a tipping system of bridge laying) were also tested from 1932. The first had a massive guide frame and a special boom (the bridge could be laid in 3 min 20 sec, the raise operation took 6-7 min), while the second was equipped with a special swinging-boom with a rack-and-pinion drive. All three variants of the ST-26 participated in military maneuvers of the Leningrad Military District in the summer of 1933; subsequently series production of the ST-26 with a cable system of bridge laying was begun as it proved to be more reliable and less complicated to maintain. The Defence Committee of the USSR ordered the production of 100 ST-26 to the end of 1933, but only 44 vehicles were assembled by the Factory No. 174 by 1934, and 20 in 1935. The delay was attributed to the manufacture of the metal bridges, carried out by the Gipstalmost Factory and several workshops using semi-handicraft techniques.
Specifications: weight - 9.5–10 tonnes (10.5–11.0 short tons); crew - 2 men (commander and driver); speed - 28 km/h (17 mph); range - 120 km (75 mi).
The Armoured Engineering Section of the Red Army's Research Institute of Engineer Equipment (NIIIT RKKA) in co-operation with the Gipstalmost Factory developed an improved engineer tank at the end of 1936, with a lever hydraulic system of bridge laying (similar to the UST-26, see below) and a small turret of new design. The bridge could be laid in 45 sec and the raise operation took 1.5 min (both processes did not require crew exit). The vehicle was assembled by the Podolsk Machine Factory named after S. Ordzhonikidze in July 1937, and was successfully tested at the NIIIT Proving Ground (85 bridge layings were performed and 70 light tanks passed over the bridge). This ST-26 prototype was also tested at the Kubinka Tank Proving Ground, and participated in military exercises of the Leningrad Military District in 1938. A decision was made in 1939 to produce a batch of engineer tanks with the lever hydraulic system, but the Podolsk Machine Factory could assemble only one. The Stalingrad Tractor Factory probably also produced two such vehicles the same year.
An experimental multispan bridge was developed in 1934 which allowed for the coupling together of three or more ST-26 bridges, using special automatic grips in the end of each bridge section. The multispan bridge employed 250 kg metal columns 2.5 m (8.2 ft) high and was intended for crossings by T-26 and BT light tanks of water obstacles up to 20–50 m (66–164 ft) wide and 3 m (9.8 ft) deep. The launching of each bridge section took 20-30 min. The bridge had no development after testing.
Engineer Alexandrov from the Research and Technology Division of the Red Army's Engineer Directorate (NTO UNI RKKA) developed a wooden tracked bridge 6.5 m (21 ft) long. The bridge was mounted on standard T-26 light tanks as well as on ST-26 engineer tanks and could be laid in 30-60 sec without crew exit. Trials carried out in July–August 1934 were successful and 20 such bridges were issued to the armed forces.
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