BT tank

BT tank

Infobox Weapon
name= BT tank


caption= BT-5 command tank, with horseshoe antenna around the turret top
origin= Soviet Union
type= Light cavalry tank
is_artillery=
is_vehicle= yes
is_UK= yes
service= 1932–45
used_by=
wars= Spanish Civil War, Soviet–Japanese Border Wars, World War II
designer= J. Walter Christie, Morozov
design_date= 1930–31
manufacturer= KhPZ
unit_cost=
production_date= 1932–41
number= ~7,000
variants=
spec_label= BT-5
weight= 11.5 tonnes
length= 5.58 m
width= 2.23 m
height= 2.25 m
crew= 3
elevation=
traverse=
armour= 6–13 mm
primary_armament= 45-mm Model 32 tank gun
secondary_armament= 7.62-mm DT machine gun
engine= Model M-5
engine_power= 400 hp (298 kW)
pw_ratio= 35 hp/tonne
transmission=
suspension= Christie
clearance=
fuel_capacity= 360 l
vehicle_range= 200 km
speed= 72 km/h

The Fast Tank ( _ru. Быстроходный танк, "Bystrokhodny tank", abbr. БТ, "BT"), was a series of Soviet 'cruiser tanks' which were produced in large numbers between 1932 and 1941. They were lightly armoured, but reasonably well-armed for their time, and had much better mobility than other contemporary tank designs. The BT tanks were known by the nickname "Betka" from the acronym, or its diminutive "Betushka". [Zaloga 1984, p 74.]

Overview

The BT tanks were 'convertible tanks'. This was a feature designed by J. Walter Christie to reduce wear of the unreliable tank tracks of the 1930s. In about thirty minutes the crew could remove the tracks and engage a chain drive to the rearmost road wheel on each side, allowing the tank to travel at very high speeds on roads. In wheeled mode the tank was steered by pivoting the front road wheels. However, Soviet tank forces soon found the convertible option of little practical use in a country with few paved roads, and it consumed space and added needless complexity and weight. The feature was dropped from later Soviet designs.

BT tanks saw service in the Spanish Civil War, in the Far East, in the Winter War in Finland, the Polish campaign, and in the early part of World War II. The BT tank design served as a platform for experimentation with artillery support tanks and advanced armour layout, and further development led directly to the famous T-34 tank.

Production history

In 1930, Soviet agents at Amtorg, ostensibly a Soviet trade organization, used their New York political contacts to persuade U.S. military and civilian officials to provide plans and specifications on the Christie tank design to the Soviet Union. At least two of Christie's M1931 tanks (without turrets) were later purchased in the United States and sent to the Soviet Union under false documentation in which they were described as 'agricultural tractors'. Both tanks were successfully delivered to the Kharkov Komintern Locomotive Plant (KhPZ). The original Christie tanks were designated "fast tanks" by the Soviets, abbreviated BT. Based on the Christie prototypes and previously obtained plans, three unarmed BT-2 prototypes were completed in October 1931 and mass production began in 1932. Most BT-2s were equipped with 37 mm gun and one machine gun, but shortages of 37 mm guns led to some early examples being fitted with three machine guns. The BT-3 and later models were equipped with a 45 mm gun. The sloping front armor design of the Christie M1931 prototype was retained in later Soviet tank hull designs, later adopted for side armor as well.

In 1937, a new design team was formed at the KhPZ under Chief designer Mikhail I. Koshkin, to create the next generation of BT tanks. The team built a BT prototype called the A-20, but also built a more heavily armed and armoured derivative, the A-32, a "universal tank" to replace both the T-26 infantry tank and BT line of cruiser tanks. The design was controversial, but concerns about tank performance under the threat of German Blitzkrieg led to the approval for production of a still more heavily-armoured version, the T-34 medium tank.

Production:
* BT-2: 620
* BT-5: 2,108 [ [http://www.morozov.com.ua/eng/body/tanks/bt-5.php?menu=history5.php KMDB - BT-5 Light Wheeled/ Tracked Tank ] ]
* BT-7: 4,965 [ [http://www.morozov.com.ua/eng/body/tanks/bt-7.php?menu=history5.php KMDB - BT-7 Light Wheeled/ Tracked Tank ] ]
* BT-7M: 790 [ [http://www.morozov.com.ua/eng/body/tanks/bt-7m.php?menu=history5.php KMDB - BT-7M Light Wheeled/ Tracked Tank ] ]

Variants

* BT-1: Christie prototype.
* BT-2 Model 1932: 37 mm gun, M-5 engine (copy of U.S. Liberty engine).
* BT-5: larger cylindrical turret, 45 mm gun, ball-mount MG.
** BT-5 Model 1933: new turret with twin hatches, larger bustle and coaxial MG.
** BT-5PKh: snorkelling variant (prototypes only).
** BT-5A: artillery support version with 76.2 mm howitzer (few made).
** BT-5 flamethrower tank: (prototypes only).
** PT-1A: amphibious variant with new hull (few made).
* BT-7 Model 1935: welded hull, redesigned hull front, new Mikulin M-17T engine (copy of BMW), enclosed muffler.
** BT-7 Model 1937: new turret with sloping armour.
** BT-7TU: command version, with whip antenna instead of earlier horseshoe antenna.
** BT-7A: artillery support version with 76.2 mm howitzer.
** OP-7: flame-thrower version with external fuel panniers.
* BT-7M [ [http://www.morozov.com.ua/eng/body/tanks/bt-7m.php?menu=history5.php KMDB - BT-7M Light Wheeled/ Tracked Tank ] ] (1938, prototypes designated A-8; sometimes referred to as BT-8): new V-2 diesel engine replacing earlier gasoline engines, three DT machine guns: coaxial, in P-40 AA mount on roof and in a ball-mount on turret rear.
* BT-42: Finnish assault gun, captured BT-7s were equipped with British 114 mm howitzers.
* BT-IS: Prototype/proof-of-concept platform with heavily sloped armor; forerunner of the armor design on the T-34.
* BT-SW-2 "Cherepakha" ("turtle"): Another prototype, which took the armour sloping to an extreme.
* A-20: Prototype for a new BT tank, with 20 mm armour, 45mm gun, model V-2 diesel engine, and 8×6-wheel convertible drive. Lost out in trials to the A-32, which was further improved and produced as the T-34 medium tank.

* TTBT-5, TTBT-7: teletanks, remote-controlled tanks.

Specifications

Combat History

BT tanks were used in combat on several occasions prior to World War II. A battalion of BT-5s saw action on the Republican side in the Spanish Civil War, where their 45 mm guns could easily destroy the opposing German and Italian light tanks. In the border skirmishes against Japan in 1939 (including the battle of Khalkhin Gol), both BT-5s and BT-7s were used. Again the BT generally outclassed the lightweight enemy tanks. Against Finland during the Winter War (mainly BT-2 and BT-5 models) the BT was less successful. The Finnish forces were well-led, highly motivated and defending very constricted terrain. The thinly-armored BTs were very vulnerable to dug-in Finnish anti-tank guns.

In the Second World War, BT-5s and BT-7s took part in the Soviet occupation of eastern Poland in 1939, and in large numbers in the battles of 1941. Most of these tanks were abandoned or destroyed in the disastrous 1941 campaign. A few continued in use in 1942, but they became quite rare after that time.

The Red Army planned to replace the BT series with the T-34 and had just begun doing so when the German invasion (Operation Barbarossa) took place.

In the Far East, a significant number of BT-7 tanks took part in Operation August Storm against Japan in Manchuria, during August 1945. This was the last combat action of BT-series vehicles.

Technical Legacy

The BT series was numerous, forming the 'cavalry tank' arm of the pre-war Red Army, and had much better mobility than other contemporary tank designs. For these reasons, there were many experiments and derivatives of the design, mostly conducted at the KhPZ factory in Kharkov, Soviet Ukraine.

The most important legacy of the BT was the T-34 design, derived in part from the BT. The T-34 had many innovations well beyond the BT, but the lineage is obvious. Along the way, an important technical development was the BT-IS and BT-SW-2 series of testbed vehicles, which demonstrated the construction of vehicles with very heavily-sloped armor. This proof-of-concept led directly to the armor layout of the T-34.

BTs were also used as chassis for engineer support vehicles and mobility testbeds. A bridgelayers variant had a T-38 turret and launched a bridge across small gaps. Standard tanks were fitted as fascine carriers. The RBT-5 hosted a pair of large artillery rocket launchers, one on each side of the turret. Several designs for extremely wide tracks, including, oddly, wooden 'snowshoes' were tried on BTs.

The KBT-7 was a thoroughly modern armored command vehicle that was in the prototype stage when WW2 broke out. The design was not pursued during the war.

In the Kiev maneuvers of 1936, foreign military observers were shown hundreds of BTs rolling by a reviewing stand. In the audience were British Army representatives, who returned home to advocate for use of Christie suspension on British cruiser tanks. The British A-13, Crusader, and Cromwell tanks all used suspension designs derived from the Christie via the BT. Interestingly, the pointed shape of the hull front armor on the BT also influenced the design of the British Matilda tank.

References

*

External links

* [http://www.battlefield.ru/index.php?option=com_content&task=category&sectionid=5&id=26&Itemid=50&lang=en Tank development index] at the Russian Battlefield
* [http://henk.fox3000.com/BT.htm BT tanks and their variants] at Henk of Holland
* [http://www.nortfort.ru/np/foto_tbt1_e.html Salvage of BT-7 tank from Neva river]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Tank Girl — is a British comic character created by Damon Albarn and written by Alan Martin and originally drawn by Jamie Hewlett, and is currently drawn by Rufus Dayglo, Ashley Wood, and Mike McMahon.As the name suggests, Tank Girl drives a tank, which is… …   Wikipedia

  • Tank Man — stops the advance of a column of tanks on June 5, 1989, in Beijing. This photograph, taken by Jeff Widener of the Associated Press, became one of the most famous images of the 20th century, and an international symbol at the end of the Cold War… …   Wikipedia

  • Tank Girl — Personnage de fiction apparaissant dans Tank Girl Alias Rebecca Buck Pouvoirs tireuse d’élite …   Wikipédia en Français

  • Tank research and development — continues in many industrial countries despite the end of the Cold war. The funds involved are lower than when the United States and the Soviet Union were engaged in a massive arms race. Most of the tank design bureaus or arsenals now function… …   Wikipedia

  • tank — [ tɑ̃k ] n. m. • 1857; mot angl. « réservoir »; tanque « citerne pour se baigner, aux Indes » 1617; mot port. 1 ♦ Citerne d un navire pétrolier. Cylindre métallique de grandes dimensions utilisé comme réservoir dans certaines industries. Tank à… …   Encyclopédie Universelle

  • Tank desant — ( ru. танковый десант, tankovyy desant ) is a military combined arms tactic, where infantry soldiers ride into an attack on tanks, then dismount to fight on foot in the final phase of the assault. Desant (from fr. descente to disembark) is a… …   Wikipedia

  • Tank formations during the Cold War — Tank formations and number of tanks of the most important countries in Europe during the Cold War.List of units: West Germany German Army as of 1981/82: * 6 Tank Divisions (Panzerdivisionen) * 4 Armored Infantry Divisions… …   Wikipedia

  • Tank Girl (film, 1995) — Tank Girl Tank Girl Alias Rebecca Buck Pouvoir aucun, endurance, agilités, tireur d élite, possède un tank, bazooka, fusil, batte de base ball Créé par …   Wikipédia en Français

  • Tank blanketing — Tank blanketing, also referred to as tank padding, is the process of applying a gas to the empty space in a storage container. The term storage container here refers to any container that is used to store products, regardless of its size. Though… …   Wikipedia

  • Tank — Tank  игровой автомат, работающий при опускании жетонов. Представляет собой простую аркадную игру для двух игроков. Выпущен 5 ноября 1974 года компанией Kee Games, дочерним предприятием Особенности Tank  первый игровой автомат, использовавший для …   Википедия

  • Tank (аркадная игра) — Tank  игровой автомат, работающий при опускании жетонов. Представляет собой простую аркадную игру для двух игроков. Выпущен 5 ноября 1974 года компанией Kee Games, дочерним предприятием Atari. Особенности Tank  первый игровой автомат,… …   Википедия

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”