IS-3 | |
---|---|
Type | Heavy tank |
Place of origin | Soviet Union |
Service history | |
In service | 1945 - present (Sources vary) |
Used by | Soviet Union Egypt Hungary South Ossetia Georgia North Korea |
Wars | World War II Korean War Six-Day War First South Ossetian War War in Donbas |
Production history | |
Designed | 1944 |
Manufacturer | Factory No.100 Kirovskiy Works |
Produced | 1945–47 |
No. built | 2,311 [1] (Total) |
Variants | IS-3M |
Specifications | |
Mass | 46,500 kg (102,500 lb) (Combat) |
Length | 9.85 m (32.3 ft) |
Width | 3.15 m (10.3 ft) |
Height | 2.45 m (8 ft 0 in) |
Crew | 4 (Commander/Radio Operator, Gunner, Loader, Driver) |
Caliber | 122mm |
Armor | 110 mm (4.3 in) (Hull front) |
Main armament | 122mm Gun D-25 (28 rounds) |
Secondary armament | 7.62mm DT MG (coaxial, 1000 rounds) 1 x 12.7mm DShK MG (AA, 945 rounds) |
Engine | Kharkiv model V-2 (V-2K) (diesel) 600hp@2000rpm |
Power/weight | 11.0 hp/tonne |
Transmission | 4 forward, 1 reverse |
Operational range | 150 km (93 mi)/120 km (75 mi) (On/off-road) |
Maximum speed | 37 km/h (23 mph)/19 km/h (12 mph) (On/off-road) |
References | [2] |
The IS-3 (also known as Object 703) is a Soviet heavy tank developed in late 1944. Its semi-hemispherical cast turret (resembling that of an upturned soup bowl), became the hallmark of post-war Soviet tanks. Its pike nose design would also be mirrored by other tanks of the IS tank family such as the IS-7 and T-10. Too late to see combat in World War II, the IS-3 participated in the Berlin Victory Parade of 1945, in the border conflict during the Sino-Soviet split, the Soviet invasion of Hungary, the Prague Spring and on both sides during the Six-Day War.
Object 703 was developed in late 1944 by Factory No.100 Kirovskiy Works or ChTZ (in Chelyabinsk) and left the factory shop in May 1945. [3] This tank had an improved armour layout, and a semi-hemispherical cast turret (resembling that of an upturned soup bowl), which became the hallmark of post-war Soviet tanks. While this low, hemispherical turret improved protection, it also significantly diminished crew headroom, especially for the loader. The low turret also limited the maximum depression of the main gun, since the gun breech had little room inside the turret to elevate, and this limited the extent to which the IS-3 could take advantage of hull-down positions. [4] The IS-3's pointed prow earned it the nickname Shchuka (Pike) by its crews. It weighed slightly less and stood 28 centimetres (11 in) lower than previous versions. Wartime production resulted in many mechanical problems and a hull weldline that had a tendency to crack open. [5] The IS-3M solved some of these problems.
The IS-3 came too late to see action in World War II. The first public demonstration of the IS-3 came on 7 September 1945 during the Allied victory parade on Charlottenburger Straße in Berlin, with the heavily reinforced 71st Guards Heavy Tank Regiment of the 2nd Guards Tank Army. [3] Starting in 1960, the IS-3 was slightly modernized as the IS-3M, in a manner similar to the IS-2M.
The IS-3 was a significant improvement to the IS-1 and IS-2 due to its pike nose frontal armor. Having frontal hull armor that was already pre-angled meant that less armor was needed to maintain the same effective armor thickness on the upper glacis.
Three pre-series vehicles were assigned to an independent Guards Battalion, but they arrived after the surrender documents were signed. There are unconfirmed reports of them fighting Jagdpanthers after the surrender. They also took part in the September 7th, 1945 victory parade in Berlin under the 71st Guards Heavy Tank Regiment of the 2nd Guards Tank Army. [1] Other reports indicate that IS-3s saw limited action against Japan in the very last days of WW2. However, no tank-on-tank engagements happened with IS-3s in those battles.
In response to border disputes between the Soviet Union and China, some Soviet IS-3s were dug in as fixed pillboxes along the Soviet-Chinese border. The IS-3 was used in the 1956 Soviet invasion of Hungary, as well as the Prague Spring in 1968.
During the early 1950s, all IS-3s were modernized as IS-3M models. The Egyptian Army acquired about 100 IS-3M tanks from the Soviet Union. [6] During the Six-Day War, a single regiment of IS-3M tanks was stationed with the Egyptian 7th Infantry Division at Rafah and the 125th Tank Brigade of the 6th Mechanized Division at Kuntilla was also equipped with about 60 IS-3M tanks. [6] Israeli infantry and paratrooper units had considerable difficulty with the IS-3M when it was encountered due to its thick armor, which shrugged off hits from normal infantry anti-tank weapons such as the bazooka. [6] Even the 90 mm AP shell fired by the main gun of the Israeli Defense Force (IDF) M48 Patton tanks could not penetrate the frontal armor of the IS-3s at normal battle ranges. [6] There were a number of engagements between the M48A2 Pattons of the IDF 7th Armored Brigade and IS-3s supporting Egyptian positions at Rafah in which several M48A2s were knocked out in the fighting. [6]
However, in one engagement between a battalion of IS-3s and 90 mm gun-armed M48A3s, seven IS-3s were destroyed. The slow rate of fire, poor engine performance (the engine was not well suited to hot-climate operations as it was originally meant to fight the Germans in Europe, along with its status as a heavy tank rather than an MBT), [1] and rudimentary fire control (Fire-control was still relatively WWII-era) of the IS-3s proved to be a significant handicap, but the main factor was not due to mobility and age of armour, but came down to poor morale and training. [7] [8] About 73 IS-3s were lost in the 1967 war. [6] Most Egyptian IS-3 tanks were withdrawn from service, though at least one regiment was retained in service as late as the 1973 October war. [6] The IDF itself experimented with a few captured IS-3M tanks, but found them ill-suited to fast-moving desert tank warfare; those that were not scrapped were turned into stationary defensive pillbox emplacements in the Jordan River area. [6] M48A2s were superior at shorter range, but the IS-3 proved to be superior at longer ranges. [8]
After the Korean War, China attempted to reverse-engineer the IS-2/IS-3 as the Type 122 medium tank. The project was cancelled in favor of the Type 59, a copy of the Soviet T-54A. In the 1950s, these were slowly replaced by the T-54, T-55, and T-10.
In 2014, an IS-3 was captured by the Armed Forces of Ukraine near the city of Donetsk from pro-Russian rebels. Footage of the tank being reactivated by the rebels circulated online, showing the tank being successfully started and driven off its plinth at a memorial in the city of Kostiantynivka, Donetsk Oblast. [9] [10] Sources from the People's Republic of Donetsk claim it was able to fire at a military outpost, killing and wounding several soldiers, before retreating and being abandoned.
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