On Water Like On Land

WWII clearly showed the importance of combat and transport vehicles that could cross water hazards. Crossings of rivers, lakes, channels, and reservoirs made planning any military operation more complicated, reduced the rate of offensives, and led to significant losses among attackers. The USSR performed nearly no work on amphibious vehicles for transport or combat. Only T-37, T-38, and T-40 tanks designed for reconnaissance were accepted into service. They were armed only with machine guns and could not effectively support infantry. After the end of the war the USSR began development of a wide variety of amphibious vehicles.

Black Prince

The British military had strange ideas about what a tank should look like in WWII, which led British tank building into a dead end. It's not surprising that the American Stuart tank became the most common light tank in the British army and the most common medium tank was the Sherman. The British were on their own when it came to heavy tanks, as there was no foreign alternative to the Churchill. That didn't stop the British from making several attempts to replace it throughout the war. The Black Prince I was one such attempt. This was a direct descendant of the Churchill tank that came up short compared to its ancestor.

Distorted Tanks

"October _, 1942

#050

To the Chief of Staff of the 1st Motorized Brigade

The Red Army General Staff reports that the German army has the following new types of tanks:

1. T-5 tank. Weight: 30 tons. Armament: 1 88 mm gun and 2 machine guns.
2. T-12 tank. Weight: 40 tons. Armament: 1 75 mm gun and 4 machine guns.
3. V-K-18 tank. Weight: 18 tons. Armament: 1 20 mm gun and 1 machine gun.

Determine the presence of these tanks and their tactical-technical characteristics from interrogation of POWs and captured documents. Report to the 3rd Mechanized Corps on your results. Send captured documents and photographs of these tanks to the 3rd Mechanized Corps.

Chief of Staff of the 3rd Mechanized Corps, Guards Lieutenant Colonel Nikitin."

Via Yuri Pasholok.

Looks like a bunch of nonsense based on unverified information that was pretty common, but these descriptions match reality quite well. The T-5 could very well be the VK 30.01(P), which indeed had an 88 mm gun. The T-12 looks more unusual, closer to the fledgeling Panther, which would have reached the weight of about 40 tons in late 1942. Finally, the V-K-18 could be the VK 18.01, but this tank only had machine guns for armament, unlike the similar VK 16.01 which the report could be confusing it with. 

Video: Performance of Tanks in Snow

It is often said that the Red Army effortlessly won battles in the winter because its tanks worked in the snow while the German ones didn't. I take a look at how true this statement is in my latest video, comparing wintertime performance of several Soviet, German, British, and American tanks.

Pereverzev's KV-4

• Mass: 100 tons
• Length: 9300 mm
• Width: 3800 mm
• Height: 3320 mm

Automatic Welding

"Order of the People's Commissar of Tank Production of the USSR #837s

Moscow

December 19th, 1942

Production using automatic welding under a layer of flux when producing armoured hulls at factory #183, UZTM, etc. proved itself as having several advantages over manual arc welding.

In addition to increased productivity, reduced electricity consumption, and the ability to use untrained workers, the high quality of the seams was proven. During proving grounds trials, they showed better resistance than welds made by hand.

Still With a Cabin

Usually one or two prototypes are built before a tank goes into production with only a few changes. However, there are exceptions. With IS series of tanks there were three of them, two of which were radically different from the final model. The similarly revolutionary T-44 evolved in a similar way. Even without significant changes in requirements,, this tank went through a series of evolutionary steps. The second variant of this vehicle was created as a result of trials held in February-March 1944. One of the main differences of the intermediate prototype was the armour. Trials showed that it was not enough to protect from the 88 mm Pak 43 L/71.

Background Check

"Name: Koshkin, Mikhail Ilyich

Year of birth: 1898

Nationality: Russian

Education: engineer-designer

Party affiliation: party member since 1919

Party offenses: none

Membership in other parties: none

Membership in oppositional or anti-party groups: none

Membership in militaries fighting against the Soviet Union: none

Foreign contacts: none

Current position: Chief Designer

Recommended by: attestation commission

Recommended for: position of chief designer

Commissions' findings:

Comrade M.I. Koshkin is descended from poor peasants. He worked at factory #183 since December 28th, 1936, starting from the position of head of design department #100, then as the head of design bureau #24. On April 1st, 1939, he was nominated for the position of the factory's Chief Designer.

T-34 Protection Trials

"Conclusions

Based on the trials of two T-34 hulls and turrets, the commission finds that:

1. On the impact of cracks and hot tears around welding on shell resistance:
1. When shells impact the area of cracking, the cracks grow negligibly. In many cases cracks do not grow.
2. The presence of cracks or hot tears in 40 or 45 mm thick armour does not decrease robustness, but is still an undesirable defect that is caused by the quality of the armour and welding. Ilyich factory and factory #183 need to develop measures to resolve these defects.
3. The presence of cracks and hot tears up to 20 mm deep around the weld is unacceptable as they lead to brittle damage to armour when hit. In exceptional cases parts can be permitted with singular cracks or with limited hot tears.

A Step in the Right Direction

Work on a radically new tank often results in the creation of intermediate vehicles. This exact thing happened with Soviet medium tanks in WW2. Several attempts were made to replace the T-34 with modernized vehicles. The first attempt was called T-34M, later the T-43 took a shot at the reigning champion. The results were similar: neither tank replaced the T-34. The first Soviet new generation medium tank, the T-44, travelled a long way and changed a lot before it entered production.