Showing posts with label A-20. Show all posts
Showing posts with label A-20. Show all posts

Wednesday, 11 May 2022

Smoke and Mirrors

 "Tactical-technical characteristics for design and production of a removable smoke device for the BT-20 tank

Purpose: the smoke device will be installed on a regular BT-20 tank to create smoke screens from standstill or on the move that cover the tank's movement.

Special requirements:

  1. The volume of the fluid tank(s) must be at least 120 L.
  2. The consumption of fluid must range from 12 to 20 L per minute. The nozzle design must be adjustable to configure the consumption. It is permissible to use two removable nozzles.
  3. The smoke device must be slight and compact. The design must be simple, easy to install and remove. It may take no longer than 2 hours for the tank's crew to install or remove.

Tuesday, 25 August 2020

New Tanks

"Decree of the Committee of Defense of the Council of People's Commissars #198ss
On the RKKA Tank Armament System

August 7th, 1938
Top Secret

Taking into account the experience of combat and study as well as the requirements for tanks on the modern battlefield, the Committee of Defense decrees that the following tank system will be adopted.
  1. Tanks
    1. Breakthrough tank (anti-tank gun destroyer): tracked type produced according to ABTU requirements developed at the tank meeting and approved by the People's Commissar of Defense (attachment #1).
      1. The People's Commissar of Machinebuilding (NKMash) must deliver an experimental breakthrough tank by May 1st, 1939. Produce a wooden model and show it to the commission on September 1st, 1938.
      2. The People's Commissar of Defense Industry (NKOP) must produce and deliver to the People's Commissar of Defense an experimental breakthrough tank for trials by July 1st, 1939. A model of this tank must be approved by the model commission by November 1st, 1938.
      3. The NKO must test all experimental breakthrough tank prototypes and select the one most closely matching requirements for a breakthrough tank to accept into service in the RKKA.
      4. As soon as the tank is put into production, remove the T-28 and T-35 from production.

Monday, 15 June 2020

Video: Did T-34 Prototypes See Battle?

It is often claimed that T-34 tank prototypes were tested in combat in the Winter War, and sometimes even in the Battle of Khalkin Gol. I explore whether or not this was possible and where the tanks were at the time of these conflicts in my latest video.


Wednesday, 8 May 2019

Expert Opinion

"Report on the development of the new A-20 tank at factory #183

The A-20 is began development at factory #183 in December of 1937 by designer Koshkin.

Information obtained by the UNKVD of Kharkov oblast reveals that Koshkin is conducting sabotage in the development of the tank. This was confirmed by the former director of factory #183 Bondarenko (convicted), from whose confession it can be seen that Koshkin was intentionally sabotaging the design of the A-20 tank from the very beginning on the orders of an anti-Soviet right-Trotskyist organization.

Tuesday, 19 March 2019

Heavyweight

"To Chief of the 8th Department, Military Engineer 1st Class comrade Afonin
November 18th, 1939

Summary
  1. A-34 vehicle (as of November 16th, 1939):
    1. Blueprints for 31 groups have been sent to the plant.
    2. Blueprints for 3 groups have not been sent to the plant completely.
    3. Blueprints for 4 groups are not yet ready: the driver's seat, the radio equipment, the turning mechanism, the instruments.
    4. 307 parts have been produced out of 1229.
  2. Parts for convertible drive trials on the A-20 will be ready no sooner than December 1st, 1939. Delays are caused by plant #500 being overloaded with orders for other tanks (A-7, D-3, D-5).
  3. Trials of the A-32 (loaded to the weight of an A-34) are complete. The tank drove for 1230 km, including 200 km on the highway. Mechanisms functioned in a satisfactory manner during the tests. During trials on the highway the drive sprockets wear heavily. Special trials (grades and slopes) are still to be performed on the A-32.
Senior Military Representative of the ABTU, Military Engineer 2nd Class, Kozyrev
Military Representative of the ABTU, Military Engineer 3rd Class, Baikov"

Tuesday, 12 February 2019

Leaning by Doing

"December 13th, 1939
#212472

To the Assistant of the Chief of the General Staff of the RKKA, Corps Commander comrade Zaharov
RE: your #57129s/s

It is not possible to perform battlefield trials of the KV, SMK, T-100, A-20, A-32, T-40, A5, A7M tanks or the BA-11 armoured car in 1939, as the experimental KV, SMK, and T-100 tanks are currently undergoing proving grounds trials.

Experimental prototypes of the A-20, A-32, T-40, A5, A7M tanks, and the BA-11 armoured car passed proving grounds trials, and the factories are now making changes to blueprints based on the results of the trials, in order to produce pilot batches.

Only tanks and armoured cars produced in 1940 will be sent to battlefield trials. 

Modernized T-28 tanks will not undergo battlefield trials, and will be issued to regular Belorussian Military District units. 

The modernized T-26 tank has a new suspension, but the turbocharged engine has not yet arrived, and therefore battlefield trials will be postponed until 1940.

The SBT bridgelayer tank will be transferred to battlefield trials in December of 1939.

On the orders of Assistant Chief of the ABTU, Corps Commander Pavlov Panfilov
On the orders of Military Commissar of the ABTU, Brigade Commissar Kulikov"

Tuesday, 14 August 2018

A-20 Production Status

"April 29th/May 4th, 1939
#205679

To the Chief of the Special Department of the NVKD GUGB of the USSR

RE: #4 04/12348

In response to your query, I reply that:
  1. The shape of the hull, armament, ammunition capacity, and cruising range of the A-20 tank have been approved by the Chief Military Council.
  2. The ABTU knows nothing about the design bureau's refusal to reduce the mass of assemblies and components of the A-20.
  3. The practical mass of the tank, robustness of the components, and accessibility will be determined in the coming months after the prototypes are built and tested.
  4. The factory has every ability to produce a prototype in the time span allotted by the government.
The Chief Engineer of the ABTU, Major Panov, is keeping track of production of the vehicles.

Chief of the ABTU, Corps Commander Pavlov
ABTU Military Commissar, Brigade Commissar Kulikov"

Wednesday, 13 June 2018

Prewar Prototypes

"November 11th, 1939
#0830/s

To the Chief of the 8th Department of the ABTU, Military Engineer 1st Class comrade Afonin

Report on the trials of the A-32 (weight down) and preparations for trials of the A-20 and Voroshilovets tractor
  1. The A-32 (second prototype) weighed down to the weight of an A-34 has travelled 1047 km. During the third march, the average moving speed off-road was no more than 20-23 kph. This was caused by terrible conditions of the terrain (mud). Typically, the vehicle can only drive in second gear off-road. The transmission is working well in these conditions, there haven't been any defects. A trip on a highway is planned on November 10th to test the running gear.
  2. Presently, A-20 components (improving the wheeled drive transmission) are undergoing mechanical finishing.
  3. Despite our insistence, Voroshilovets tractors are not being worked on at all. Management of department 500 claims that its equipment is occupied with other projects (A-7, D-3, D-5, etc). This situation may result in the Voroshilovets tractor not being ready for mass production by January 1st, 1940.
Military representative of the RKKA, Military Engineer 3rd Class, Baikov."

Wednesday, 6 June 2018

A-20 Characteristics

"A-20 tank (convertible drive)
September 10th, 1939

Tactical-technical characteristics of the A-20 tank
(Convertible drive with 3 powered pairs of wheels)
  • Mass: 18 tons
  • Length: 5.7 meters
  • Width: 2.65 meters
  • Height: 2.36 meters
  • Armour: 25 mm or equivalent in toughness
  • Armament: one 45 mm gun, two DT machineguns
  • Ammunition: 160 45 mm shells, 300 machinegun rounds
  • Crew: 4
  • Cruising range: 350-400 km
  • Engine: 500 hp V-2
  • Top speed: 75 kph
  • Mobility:
    • Maximum grade: 40 degrees
    • Widest trench: 2.4 meters
    • Maximum fording depth: 1.2 meters

Tuesday, 1 September 2015

T-34 Prototype Testing

"To the Chief of the 8th Department of the RKKA ABTU, Military Engineer 1st Grade Afonin

Report on the A-32 (weighed down), preparations for testing A-20 components, and the Voroshilovets tractor
  1. The A-32 vehicle (second) weighed down to the weight of an A-34 travelled 1047 km. During the 3rd and last round of trials, the average movement speed was not higher than 20-23 kph due to the terrible condition of the terrain (mud). The vehicle could only move in second gear.
    The transmission held up well in these conditions, no defects were discovered. Testing of the suspension on a paved road is scheduled for November 10th.
  2. At present, A-20 components (reinforced components for wheel drive) are still being processed.
  3. Voroshilovets tractor components, despite our numerous demands, are not being worked on at all. Department 500 administration claims that they are overloaded with components for other objects (A-7, D-3, D-5, etc). This situation may lead to Voroshilovets not being ready for production by January 1st, 1940.
ABTU military representative, Military Engineer 3rd Grade, Baikov."

"To the Chief of the 8th Department of the RKKA ABTU, Military Engineer 1st Grade Afonin
To the Chief of the 4th Department of the RKKA ABTU, Military Engineer 1st Grade Altymov

Report on experimental work at Department 500 at the Comintern factory for November

In November of 1939, the following work was done at the experimental plant:
  1. Trials of the A-32 vehicle loaded to the weight of an A-34 vehicle.
  2. Trials of the A-7 to determine the warranty period.
  3. Trials of parts and mechanisms of the A-7.
  4. Assembly of experimental components on the Voroshilovets tractor.
  5. Production of the A-34 vehicle.
The A-32 vehicle loaded to the weight of an A-34 travelled 1534 km, 500 km of which was on a highway. Over this distance, the following data was obtained:
  1. One kilometer of travel off-road burns 1.8-3.2 kg of fuel.
  2. Same for a highway: 1.45 kg.
  3. Average speed off-road is 18-29 kph, on the highway 35 kph.
The range in speeds is caused by the condition of the terrain. No defects were found during trials. Two trial runs were made using the factory #183 servo without a differential valve. Results are satisfactory.
...
Condition of the A-34 vehicle as of November 28th, 1939
  1. Blueprints have been submitted to production.
  2. Development of technological processes and equipment for measuring and mechanical work is not yet complete.
  3. Out of 989 components, the mechanical plants have made 332.
  4. Assembly has not yet started.
  5. Armour is scheduled to arrive on December 2nd, 1939.
  6. Production of individual components and assemblies is slightly late.
ABTU senior military representative, Military Engineer 2nd Grade, Kozyrev
ABTU military representative, Military Engineer 3rd Grade, Baikov."

"Report of plant #540 #086, December 18th, 1939 on the factory trials of the A-32 loaded to 24 tons.
...
Conclusions

The trials established that:

  1. The A-32 tank loaded to 24 tons presented for trials mostly passed fall conditions trials satisfactorily.
  2. The stability of the tank as an artillery platform is good, oscillations die down quickly on bumpy roads.
  3. It is significantly harder to control the tank without a servo than an A-7. With the servo, controlling the tank is easy.
  4. In order to more easily turn on 1st and 2nd gear, it is reasonable to have the lever lean right, and the reverse gear, as an infrequently used one, be placed in the center.
  5. In order to more reasonably use all gears and improve the temperature of the engine, it is reasonable to reduce the top speed of the tank to 50 kph.
  6. The emergency with the gearbox is not a sign that the component is unreliable, as the replacement gearbox worked satisfactorily in even more difficult conditions.
  7. The final drives and brakes worked satisfactorily. Summertime trials are necessary for a final conclusion.
  8. The A-7M fan that replaced the broken fan worked satisfactorily, it is reasonable to make the fans interchangeable. 
  9. In order to improve the lifespan of the tilted suspension nuts, it is reasonable to increase their height.
  10. In order to prevent self-ejection of the bronze plugs in the tilted suspension, add stoppers.
  11. Reinforce the road wheels in order to increase lifespan. 
  12. Change the idlers to ease the tightening of tracks and reduce the time it takes to complete that task. Move the idler cranks outwards to increase the track lifespan.
Recommendations:

It is reasonable to produce experimental vehicles based on the A-32 tank with increased weight to 24 tons due to thicker armour."

RGVA 31811-3-1632

A-32 tank loaded to 24 tons for trials.

Monday, 31 August 2015

A-20 and A-32 Trials

"Summary of results from proving grounds trials of the A-20 and A-32 from July 18th to August 23rd, 1939

The A-20 convertible drive tank with 6 drive wheels was built according to tactical-technical requirements #284797 composed on May 13th 1939 with the following exceptions:
  1. The flamethrower mount was not included.
  2. The tank weight is 1.5 tons greater than projected.
  3. The underwater driving equipment is not finished.
During trials, the A-20 travelled 4200 km with the following average movement speed:
  1. Highway: 44.4 kph
  2. Dirt: 31.7 kph
The A-20 tank can keep moving on highways, off-road, and over obstacles with only one track while the wheel drive is engaged. The tank can move in a column on a highway at any time of year and on dry dirt roads. The maximum speed on tracks is 75 kph.

During trials the tank demonstrated satisfactory reliability.

The A-32 tank is built according to the same tactical-technical requirements and is armed with a 76 mm gun. During trials, the tank travelled 3000 km and also demonstrated satisfactory reliability.

The A-20 and A-32 have the following advantages of the the BT tanks:
  • The armour is thicker and placed at an angle, guaranteeing protection against 12.7 mm bullets.
  • Tanks have larger internal volume, and it is used better.
  • The tanks are more stable as a firing platform and have a front machinegun in the hull.
  • The tanks have better off-road performance than the BT tanks.
  • The V-2 diesel is less dangerous from a fire safety standpoint, is more economical, works off heavy fuel, gives the ability to drive more in battle, and is easier to service.
  • The crew is increased to 4 men.
  • The A-32 has a reserve in mass, meaning it can be protected by thicker armour.
Drawbacks of the tanks:
  • Insufficiently reliable idler mounts.
  • Fuel and oil leak due to insufficiently robust tanks.
  • The A-20 wheel drive bearings are unreliable.
  • Crew positions and optics are not finalized.
Conclusions:

The A-20 tank is acceptable for use by the RKKA. Include improvement in blueprints based on the results of trials.
The A-32 tank is acceptable for use by the RKKA. Use the mass reserve to increase armour to 45 mm or equivalent. Produce two prototypes that will be sent to military trials.

Chief of the 8th Department of the ABTU RKKA, Military Engineer 1st Grade, Afonin."

RGVA 31811-2-1181

Thursday, 4 December 2014

World of Tanks History Section: Mikhail Koshkin

In the history of tank building, Mikhail Ilyich Koshkin played an important role as a man who was not afraid to take responsibility and to stubbornly absorb and analyze everything new. It is known that the T-34 contains the designs of others: A.O. Firsov, A.Ya. Dik, and other colleagues, but it is not known what fate awaited the project had it not been for Koshkin's effort and organizational talent.

Childhood was perhaps the most difficult time in the life of the future chief engineer. Mikhail Koshkin was born on December 3rd, 1898 in the village of Brynchagi, Yaroslavl county. He lived poorly: his family had little land, three children, and his father had to be away from home often to find work. In 1905, he died in a logging accident. His mother had to become a labourer to make ends meet.

At 10, young Misha finished school at his local church and left to find work in Moscow. Koshkin managed to find work at a confectionery factory, where he worked until the age of 17. His money was sent to his mother and sisters, who remained at home.

A harsh military life in a newly forming country steeled Koshkin's character. In February of 1917, he was drafted into the army as a private. In August, he was wounded and demobilized, but on April 15th of the very next year, he volunteered to join the ranks of a newly formed railroad Red Army squad.

In the summer of 1918, Koshkin fought at Tsaritsyn, and was transferred to Petrograd in 1919 along with his battalion, to the Northern Front. There, he fought to take Arkhangelsk, and it is possible that this is where he first saw a tank. However, it will be long before he starts an engineering career. On the way to the Polish front, Koshkin fell ill with typhoid. Upon his recovery, he was sent to the South Front to fight Wrangel's forces.

In the Red Army, Koshkin showed promise in political work. After the end of the Civil War, Koshkin studied at the Sverdlov Communist University. He finished his studies in 1924, and was given a job as a manager of a confectionary factory in Vyatka. He moved up the Party line as a talented manager and activist.

Koshkin's ability to inspire people and work with a team helped him later in life. The trust he earned was perhaps responsible for making the Kharkov factory a Soviet tank building giant.

In 1929, thousands of communists in manufacturing were enrolled in technical colleges. Koshkin was sent to the Leningrad Machine-Building Institute. The country needed modern tanks and talented engineers to make them. Koshkin worked at the Kirov Factory in Leningrad from 1934, taking part in the design of T-29 and T-111 (T-46-5). His work on the latter vehicle earned him the Order of the Red Star.

Work at the factory was going well, and Koshkin was promoted to deputy design bureau chief. In 1936, he was sent to Kharkov to organize assembly of tanks at the Kharkov Locomotive Factory (#183), which was converted to serve military needs.

At the time of Koshkin's arrival, the factory was at a time of crisis. The previous manager, A.O. Firsov, did not meet production quotas. Now, alongside building BT-7 tanks, new vehicles had to be designed.

In this difficult atmosphere, through constant inspections and interrogations of his engineers, Koshkin tried to set up his design bureau. New projects were met with little enthusiasm; resources were lacking. As a result, his first Kharkov project, the BT-9, was declined, as it did not meet the technical requirements.

In February of 1939, the Committee of Defense had a meeting at which two of Koshkin's designs were approved: the A-20 and A-32 (A-20G). The first was an improvement of the BT-20 design, the second was a tracks-only version of the first. At first, the factory was only assigned the A-20, but Koshkin defended the need for both vehicles.

He understood that convertible drive vehicles could not keep growing their armour and armament. The final decision, of course, was influenced by Koshkin's personality and character. He was a reliable man, with a distinguished past. His word that both prototypes will be ready in time was enough. As a result, Stalin said that he believes the factory was capable of it, and issued the funds for a second project.

With its wheels, the A-20 was faster than its competitor. However, the A-32 surpassed it in armament, armour, and off-road performance. It was decided that a new tank will be built with it as a foundation: the T-34. The factory built two pre-production prototypes to show off to Moscow, indexed A-34. The problem was with testing requirements: the tanks did not have the time to pass reliability trials.

It was possible to delay the demonstration or send the vehicles over before they were sufficiently tested, but it was decided to combine the trials and transport to Moscow. The route was chosen through rough terrain, around cities and roads. The tanks left the factory at 16:00 on March 12th, and were at the walls of the Kremlin by early morning of March 17th.

During the trip from Kharkov to Moscow, Koshkin fell ill. Despite his illness, he refused to return to Kharkov by train. In April, he accompanied his tanks on the journey back to the factory. The stress, combined with his illness, eventually cost Koshkin his life. He caught pneumonia, but even in this condition, he continued to direct work on the T-34. His poor health meant that he could not attend the final meeting of the trials commission. Soon, his condition worsened, and he had a lung removed. During his recovery, on September 26th, 1940, Koshkin died. In 1942, he received a Stalin prize posthumously "for the development of a new type of medium tank".

An interest in the engineer's life awoke only in the 1980s. Books were written about him, a movie called "Chief Engineer" came out. In 1989, the Council of Veterans of Pereslavl-Zalesskiy sent a letter to the Soviet leadership to ask for a posthumous award of Hero of Socialist Labour. The order to do so was signed on October 4th, 1990. Memorials and statues of Koshkin have been put up in Kharkov, Kirov, Saint-Petersburg, and in the village where he was born.

Article author: Nikolai Nevskiy is a historian, specializing in Soviet tank production in the Great Patriotic War.

Sources:
  • Ya.L. Reznik, Sotvoreniye Broni. Dokumentalnaya Povest, Moscow, Voyenizdat, 1987
  • M.N. Svirin, Bronetekhnika Stalina, Tanki i Samohodki SSSR, Moscow, Eksmo, 2014
  • V.L. Karnatsevich, 100 Znamenityh Kharkovchan, Kharkov, Folio, 2005
  • I.G.Zheltov, A.Yu. Makarov, A-34. Rozhdeniye Tridtsatchetverki, Moscow, Tactical Press, 2014
Original article available here.

Saturday, 18 October 2014

World of Tanks History Section: Morozov's Top Ten

On October 16th, 1904, one of the most talented Soviet tank engineers, Alexander Alexandrovich Morozov, was born. He lived for 75 years, and gave nearly two thirds of his life to tanks. He started out a blueprint copier at a Kharkov factory, then served as a rank and file engineer, then section chief, then chief engineer. Morozov was never on the front lines, but his tanks took part in battle from the first days of the war.

He continued designing tanks after 1945, and his vehicles set the trends of Soviet tank design. Here are ten vehicles from this exceptional engineer's career that can be called exemplary.

1. BT-7. 

The convertible drive BT tanks were one of the main components of the RKKA tank forces before the war. The BT-7 was the last of this family.

The BT-7 was armed with a 45 mm gun, could reach speeds of 70 kph, and had anti-bullet armour. In the late 1920s and early 1930s, this armour was standard in nearly every army, but in the late 1930s, it was no longer enough.

The BT series served as a chassis for new technical solutions, like the installation of a 76 mm gun or experiments with sloped armour (BT-SV).

The BTs fought in the Spanish Civil War, at Khalkin-Gol, during the Winter War. In June of 1941, Soviet mechanized corps that were still armed mainly with BT-7s took the brunt of the Wehrmacht's offensive.

2. A-20

In 1937, a new tank for the Red Army was being developed. The A-20 still used the convertible drive, such was the requirement from the military. Externally, it had little in common with the BT-7, aside from large road wheels, characteristic of the Christie suspension.

The tank had a welded hull and a new turret. The armour plates were sloped to increase the chances of a ricochet. The front armour was up to 20 mm thick. The tank could accelerate up to 80 kph on a highway.

The vehicle was never mass produced. The only A-20 ever built fought with the 22nd Tank Brigade. Engineers, including A. Morozov, managed to convince the military that a purely tracked vehicle was better than a combination of wheels and tracks, and so the A-20 was not needed.

Morozov and his bureau did not waste their time. The A-20 was the predecessor of a vehicle that earned its legendary title.

3. T-34

The T-34 needs no introduction. Countless books and articles have been written about it. The T-34 fought in the Great Patriotic War from the first day to the last as the workhorse of the Red Army.

At the start of the war, this tank's 45 mm thick armour and 76 mm gun made it one of the most powerful tanks in the world. The Germans only managed to surpass it in armour and firepower with the Tiger, Panther, and Ferdinand.

The first T-34s were far from ideal, and were improved greatly throughout the war. A T-34 built in 1943 was significantly different from a T-34 built in 1940-41. Morozov played a key role in all of the tank's modernizations and improvements.

4. T-43

The tank was supposed to be a descendant of the T-34, but the design differed greatly from it. Due to a superior placement of components and alteration of the hull, the level of protection rose drastically. The front armour was increased to 75 mm. The tank used a torsion bar suspension, which was more compact than the T-34's Christie suspension.

The T-43 was better armoured, but this also made it heavier. Its ground pressure came close to that of heavy tanks.

The tank was accepted into service, but was not placed into production, as the military demanded an 85 mm gun. The T-43 was so tightly coupled that there was no potential for modernization. Introducing it into production demanded the development of new technological processes, which the USSR could not allow in time of war.

5. T-34-85

The main problem with the T-34 was that in 1943, its gun was no longer sufficiently powerful. In the middle of 1943, it was decided that n 85 mm gun will be installed. In order to do this, engineers developed a larger turret with better armour, big enough for three crewmen.

The 85 mm ZiS-S-53 gun was based on an AA gun design, and provided superior penetration. This increased the effectiveness of the T-34 when fighting new German tanks. The vehicle retained excellent mobility.

It cannot be said that the T-34-85 was a radical leap forward that gave Soviet forces unparalleled supremacy, but this was a necessary and timely replacement of the T-34.

6. T-44

This tank was the leap forward. It seemed similar to the T-34-85, but its internals differed greatly.

The T-44 had a new diesel engine, placed perpendicularly across the hull. This allowed the turret to be moved further back to balance the suspension. The driver's hatch was removed from the front plate, which raised the vehicle's protection. All components and mechanisms were improved.

The Christie suspension was replaced with torsion bars. This allowed the tank to be smaller and have more room inside, making life easier for crews and repairmen.

The T-44 was accepted for service in 1944, but it had no time to serve in battle, partially due to the fact that Soviet leadership did not wish to reduce the number of T-34-85s being produced. 2000 T-44s were built after the war.

7. T-54

Another leap forward. Designed in 1946, the T-54 remained in the Soviet design school for a long time. The first vehicles had expected growing pains, but after being improved, it became a reliable and technologically efficient vehicle with a large resource for modernization.

The T-54 had a new rounded turret with up to 200 mm of front armour, an improved hull, improved transmission, and a series of other improvements. The vehicle had a 100 mm D-10T gun, which, for a while, was the most powerful tank gun in the world. Its shell could penetrate 125 mm of armour at 2000 meters.

The T-54 was used by about 30 countries worldwide, and participated in many 20th century conflicts.

8. T-55

The T-55 was developed in 1958, and had many improvements over the T-55. One of the most important ones was the installation of a full anti-radiation system. The tank had a semi-automatic rammer. The caliber and type of gun were the same as on the T-54.

The T-55 remained in production until 1979. It fought in many conflicts, and 30 countries still use it to this day. More than 10 foreign variants of the vehicle exist.

The T-55 could reach 50 kph on a highway, and its range was up to 500 km on one tank of fuel.

9. T-64

The vehicle made for a new 115 mm gun, also known as "Object 432". The tank was in production from 1960, and was a laboratory of sorts for engineers and technologists. The vehicle turned out very complicated and not exceptionally reliable. Many were built before it was accepted into service, for testing by the army. The information that came back from the military was used to continue perfecting the design.

In 1966, Object 432 was approved for service. It had a 115 mm smoothbore gun. The tank's armour was composite, and used materials other than steel to defeat HEAT shells and protect from radiation. The same armour was used on the T-64A.

10. T-64A

In the end of the 1950s and start of the 1960s, the age of Main Battle Tanks began. The MBT concept called for a tank that could perform many tasks, combining mobility, firepower, and protection.

The T-64A was accepted into service in 1969. The tank had an automatic loading mechanism, which allowed manual shell type selection. Because of this, the loader was excluded from the crew.

This was the first Soviet tank to use an optical rangefinder. It had the same composite armour as the T-64. It is hard to say whether or not the T-64A was the best tank in the world, but in the 1990s, Western military specialists admitted that it would have been a very dangerous opponent.


About the designer: 

Alecander Alexandrovich Morozov was born on October 16th, 1904 in the village of Bezhitsa, located inside the modern boundaries of Bryansk. After finishing a "real academy" (an educational institution with a focus on natural sciences and mathematics), he worked at the Kharkov Locomotive Factory. He was a file clerk, then a copier. From 1926 to 1928, he served as an aircraft engine technician.

In 1928, he returned to HPZ. Despite its peaceful title, this factory was one of the key Soviet producers of armoured vehicles, including tanks.

In 1931, he finished a machine-building college, and became a group chief in the factory's design bureau. In 1936, he was promoted to section chief. In 1938, he was promoted to Deputy Chief Engineer.

Before the war, he worked on the T-24 tank and BT tanks. Along with Mikhail Koshkin and Nikolai Kucherenko, he worked on the future workhorse of the Red Army, the T-34 medium tank.

When Koshkin died in 1940, Morozov became Chief Engineer. In 1941, the factory was evacuated to Nizhniy Tagil. Here, Morozov directed the development of the T-43, T-34-85, T-44, and T-54. After the war, Morozov designed the T-55, T-64, and T-54A.

The T-54 earned Morozov his third USSR Government Award. He earned two Hero of Socialist Labour titles and two first class Stalin Awards. In 1972, Morozov was awarded the title of Doctor of Technical Sciences.

Original article available here.

Wednesday, 19 February 2014

A-20 in Combat

The A-20 prototype lost out to its fully tracked competitor in 1939, and was prepared for a calm retirement at the Kubinka proving grounds. However, the war caused a deficit in the Red Army's armoured forces, and everything with a gun on it was sent into battle. This included the A-20. The vehicle was handed over to the 22nd Tank Brigade, and was deployed on November 28th, 1941.

Location of units of the 22nd Tank Brigade, November 28th, 1941, 21:00 
An empty rhombus marks a T-30 tank. A rhombus with a diagonal line marks a T-34 tank. A rhombus with a vertical line marks the A-20 tank. A rhombus with a dot marks the T-50 tank. A car marks a command company vehicle.

"Operational update #42 as of 12:00 on November 29th, 1941, in Ivanovskoye, which is 2.5 kilometers south-west of Pavlovskaya Sloboda. Map 100,000
  1. Elements of the 22nd Tank Brigade, from 11:00 on November 28th to 21:00 on November 28th relocated towards the Pavlovskaya Sloboda region. No combat occurred at night.
  2. Two infantry companies, two tank destroyer companies (understrength), and an AT gun battery (5 guns) moved from the Pavlovskaya Sloboda region to the Zhevnevo region (9375) and took up defensive positions.
  3. The tank regiment has 4 T-34s, 2 T-30s, 1 T-50, and 1 A-20, and is located on the south outskirts of Pavlovskaya Sloboda. An inspection of the tanks was held the morning of November 29th. 
  4. AA units are deployed west of Pavlovskaya Sloboda, and are ready to open fire.
  5. The reconnaissance company has been contacting forward units during the night.
  6. The brigade HQ is located in Ivanovskoye.
  7. The command company and medical staff are located in Timoshino.
  8. Communication with other units is maintained through telephones and through couriers. Radio contact is maintained with motorized infantry. Telephone contact is maintained with the 5-A operative group. 
  9. The second echelon is established at Zhavoronki."
I don't have any data on the combat the A-20 took part in, but it is known that the T-50 was withdrawn from this unit and returned to Kubinka with a dent from a ricochet in its turret, so it is likely that the A-20 did see some combat.