T-70 Light Tank
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The T-70 is a
light tank A light tank is a Tank classification, tank variant initially designed for rapid movements in and out of combat, to outmaneuver heavier tanks. It is smaller with thinner vehicle armour, armor and a less powerful tank gun, main gun, tailored for ...
used by the
Red Army The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People ...
during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, replacing both the
T-60 The T-60 scout tank was a light tank produced by the Soviet Union from 1941 to 1942. During this period, 6,292 units were built. The tank was designed to replace the obsolete T-38 amphibious scout tank and saw action during World War II. The K ...
scout
tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; ...
for
reconnaissance In military operations, military reconnaissance () or scouting is the exploration of an area by military forces to obtain information about enemy forces, the terrain, and civil activities in the area of operations. In military jargon, reconnai ...
and the T-50 light infantry tank for
infantry Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadl ...
support. The T-80 light tank was a more advanced version of the T-70 with a two-man turret—it was produced only in very small numbers when light tank production was abandoned. The T-90 self-propelled anti-aircraft gun was a prototype vehicle with twin machine guns, based on the T-70 chassis. The T-70 was armed with a 45-mm L/46 gun Model 38 with forty-five rounds carried, and a
coaxial In geometry, coaxial means that several three-dimensional linear or planar forms share a common axis. The two-dimensional analog is ''concentric''. Common examples: A coaxial cable has a wire conductor in the centre (D), a circumferential ou ...
7.62-mm DT machine gun. The tank was operated by a driver and a commander who loaded and fired the gun. Armour thickness on the turret front was 60 mm, turret sides and rear: 35 mm, hull front and sides: 45 mm, roof and bottom: 10 mm.


Production history

By 1942,
light tank A light tank is a Tank classification, tank variant initially designed for rapid movements in and out of combat, to outmaneuver heavier tanks. It is smaller with thinner vehicle armour, armor and a less powerful tank gun, main gun, tailored for ...
s were considered inadequate by the Red Army, unable to keep up with the
T-34 The T-34 is a Soviet medium tank from World War II. When introduced, its 76.2 mm (3 in) tank gun was more powerful than many of its contemporaries, and its 60-degree sloped armour provided good protection against Anti-tank warfare, ...
medium tank and unable to penetrate the armour of most German tanks, but they could be produced by small factories that were unable to handle the large components of medium and heavy tanks. The T-70 was an attempt to remedy some of the shortcomings of the T-60 scout tank, which had very poor cross-country mobility, thin armour, and an inadequate 20-mm gun. It also replaced the very short production run of the T-50 light infantry tank, which was more sophisticated, but also much more complicated and expensive to produce. The T-70 was designed by Nicholas Astrov's design team at Factory No. 38 in Kirov. The first batch of T-70s were built with a GAZ-202 automotive engine on each side of the hull, one driving each track. This arrangement was seen to be a serious problem, even before the first tanks were issued. It was quickly redesigned as the T-70M (although it continued to be referred to as just ''T-70''), with the engines in-line on the right side of the tank and a normal transmission and differential. The conical turret was replaced by one more easily welded out of plate armour, and moved to the left side of the hull. Curiously, even after the T-70's production line was redesigned,
SU-76 The SU-76 ('' Samokhodnaya Ustanovka 76'') was a Soviet light self-propelled gun used during and after World War II. The SU-76 was based on a lengthened version of the T-70 light tank chassis and armed with the ZIS-3 mod. 1942 76-mm divisional ...
self-propelled guns started to be built with the same unsatisfactory unsynchronized two-engine layout, and all of them were later recalled for factory rebuilding as SU-76Ms. T-70s were put into production in March 1942 at Zavod No. 37, and along with T-60 production at
GAZ Gaz may refer to: Geography *Gaz, Kyrgyzstan Iran * Gaz, Darmian, village in South Khorasan province * Gaz, Golestan, a village in Bandar-e Gaz County * Gaz, Hormozgan, a village in Minab County * Gaz, Kerman, a village * Gaz, North Khorasan, a ...
and Zavod No. 38. They completely replaced T-60 production in September 1942, although that tank remained in use until the end of the war. Production ended in October 1943, with 8,226 vehicles completed. In April 1942, the conical turrets on early-production machines were replaced with new welded turrets. The end of the T-70's production run was built with two 85-hp GAZ-203 engines, a
Mark 4 Mark 4 is the fourth chapter of the Gospel of Mark in the New Testament of the Christian Bible. It tells the parable of the Sower, with its explanation, and the parable of the Mustard Seed. Both of these parables are paralleled in Matthew and ...
commander's
periscope A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with ...
replacing a vision slit, and other improvements. The T-70 remained in service until 1948.


Decline of light tanks

The one-man turret of the Soviet light tanks made co-ordinating a tank platoon nearly impossible, because the commanders were kept busy acquiring targets, loading and firing the main gun and machine gun, and commanding their drivers. The
infantry tank The infantry tank was a tank concept developed by the United Kingdom and France in the years leading up to World War II. Infantry tanks were designed to support infantrymen in an attack. To achieve this, the vehicles were generally heavily arm ...
role was already considered obsolete. The SU-76 self-propelled gun was better suited for infantry support, its 76.2-mm gun capable of firing a larger high explosive
shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses Science Biology * Seashell, a hard outer layer of a marine ani ...
. Industrial resources could be redirected from light tanks to building SU-76s. In an attempt to compensate, the T-80 light tank was designed, a more robust version of the T-70 with a two-man
turret Turret may refer to: * Turret (architecture), a small tower that projects above the wall of a building * Gun turret, a mechanism of a projectile-firing weapon * Optical microscope#Objective turret (revolver or revolving nose piece), Objective turre ...
. But there was enough
lend-lease Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (),3,000 Hurricanes and >4,000 other aircraft) * 28 naval vessels: ** 1 Battleship. (HMS Royal Sovereign (05), HMS Royal Sovereign) * ...
equipment available to fulfill the reconnaissance role of the light tanks, and armoured cars were better suited for light scouting and liaison. All light tank production was cancelled in October 1943, after only about 120 T-80s were built. No further light tanks would be built during the war. In November 1943 Red Army tank
units Unit may refer to: General measurement * Unit of measurement, a definite magnitude of a physical quantity, defined and adopted by convention or by law **International System of Units (SI), modern form of the metric system **English units, histo ...
were reorganized: light tanks were replaced by the T-34 and the new T-34-85 variant, which started production the following month. Light tanks continued to be used in self-propelled artillery and some other units. The Soviets did start development work on an amphibious light tank in 1945, resulting in the post-war
PT-76 The PT-76 is a Soviet Union, Soviet amphibious vehicle, amphibious light tank that was introduced in the early 1950s and soon became the standard reconnaissance tank of the Soviet Army and the other Warsaw Pact armed forces. It was widely exporte ...
, introduced in 1954.


Variants

*
SU-76 The SU-76 ('' Samokhodnaya Ustanovka 76'') was a Soviet light self-propelled gun used during and after World War II. The SU-76 was based on a lengthened version of the T-70 light tank chassis and armed with the ZIS-3 mod. 1942 76-mm divisional ...
self-propelled gun:
tank destroyer A tank destroyer, tank hunter or tank killer is a type of armoured fighting vehicle, predominantly intended for anti-tank duties. They are typically armed with a direct fire anti-tank gun, artillery gun, also known as a self-propelled anti-ta ...
with a 76mm
ZiS-3 The 76-mm divisional gun M1942 (ZiS-3) () (GRAU index: 52-P-354U) was a Soviet 76.2 mm divisional field gun used during World War II. ''ZiS'' was a factory designation and stood for ''Zavod imeni Stalina'' ("factory named after Stalin"), t ...
cannon mounted on a modified T-70 chassis. *T-90 self-propelled anti-aircraft gun: the Soviet Union lacked tracked, armoured self-propelled anti-aircraft guns at the beginning of World War II. The first serious design of a real air-defence vehicle was in 1942, when a twin 12.7 mm DShK machine gun turret with optical sights was built for mounting on the T-60 scout tank. The T-70 became available in the meantime, and was adopted as the basis for the T-90 self-propelled anti-aircraft gun. The program was cancelled in 1943, in favour of the
ZSU-37 ZSU-37 was a Soviet-made, light, self-propelled anti-aircraft gun (SPAAG), developed by the end of 1943 and produced at Works No. 40 in Mytishchi. It was the first Soviet series-produced tracked SPAAG. ZSU stands for Zenitnaya Samokhodnaya Usta ...
37 mm self-propelled anti-aircraft gun, built on an SU-76 chassis.Zaloga & Grandsen 1984:119 The ZSU-37 used the cannon developed for the M1939 towed carriage. * ZUT-37: prototype anti-aircraft tank armed with a Sh-37 cannon. The tank passed field tests but was not accepted into production.


See also

*
List of Soviet tanks Below is a list of tanks and other armoured fighting vehicles of the Russian empire, Soviet Union, the Russian Federation, and Ukraine. Imperial Russia, World War I Armored tractors *Gulkevich's armored tractor *F. Blinov armored tractor *Wa ...
- covers all periods


References

;Notes ;Bibliography *


External links


Full panorama of external and internal T-70

T-70 Light Tanks
at WWIIVehicles.com
Specifications at WWIITanks.co.uk

Photo gallery at svsm.org


T-70 tanks in museum and monuments {{WWIISovietAFVs Light tanks of the Soviet Union World War II tanks of the Soviet Union GAZ Group military vehicles Reconnaissance vehicles World War II light tanks Light tanks of the Cold War Military vehicles introduced from 1940 to 1944