Monday, 18 September 2017

Lend Lease Impressions: 37 mm M3 Anti-Tank Gun

37 mm M3 Anti-Tank Gun

"37 mm M3 Anti-Tank Gun

The gun has a vertical sliding breech without a semiautomatic mechanism. The mount has split trails, and the wheels can elevate above the ground in battle position. The wheels are equipped with pneumatic tires. The suspension is rigid. 

The following is a table of the main characteristics of the American and German 37 mm guns, as well as our 45 mm mod. 1937 gun.

Sunday, 17 September 2017

45 with a Long Nose

The history of this anti-tank gun began with work done on personal initiative in December of 1941. Before mass production and service on the front lines, the gun, indexed M-42, defeated several similar weapons in trials, including some that were easier to produce, and became the main 45 mm gun of the Red Army.

Saturday, 16 September 2017

Big Dreams, Small Chassis

Despite the difficulty with which the Soviet T-40 amphibious reconnaissance tank entered production, designers considered the platform quite promising. The T-40 chassis would be used to produce the GAZ-22 artillery tractor, which would eventually replace the Komsomolets. The fact that the T-40 was also seen as an SPG platform was less well known. Most of the designs remained on paper, but at least one was produced in a small batch.

Thursday, 14 September 2017

SMG Showdown

In December of 1941, the Soviets decided to test a bunch of SMGs. The SMGs were as follows:
"Model 1940" (PPD)
"Model 1941" (PPSh)
Suomi
Bergman BMP-34 #260
Schmeisser 18/28 #77598
Neuhausen
(They also had something called an Esti, but no ammunition for it).


"Firing of the Esti submachinegun was not performed, due to a lack of ammunition for it. 

The results of trials are attached in table 5. Average results are summarized in the following table.

Name
Type of fire
Spread
Group center offset
R100
R50
Horizontal
Vertical
Mod. 1940
Single
24.4
8.1
+17.0
+6.2
Burst
62.0
24.8
+29.8
+2.8
Mod. 1941
Single
17.2
7.0
+16.5
-3.5
Burst
37.4
15.7
+24.3
-2.2
Suomi
Single
17.4
7.0
+12.5
+12.6
Burst
36.3
11.5
+21.0
+2.3
Bergmann BMP-34
Single
16.4
5.9
+13.4
+11.7
Burst
22.9
14.2
+16.6
+4.0
Schmeisser 18/28
Single
20.9
8.5
-13.6
-1.5
Burst
41.3
13.9
-8.8
+0.3
Neuhausen
Single
14.3
6.1
+36.9
+7.7
Burst
21.8
7.1
+25.5
+9.0

The data shows that the best precision, either when shooting in bursts or in single fire, is achieved by the Neuhausen submachinegun.
The worst precision results were achieved by the model 1940 submachinegun."

Via Andrei Ulanov.

Wednesday, 13 September 2017

Demolition Tanks

"April 5th, 1941

Tactical-technical characteristics for design and production of an explosive delivery and deployment device for the T-34
  1. The explosive delivery and deployment device for the T-34 tank is designed to demolish various bunker type fortifications, which can only be approached under the protection of armour, and destruction of anti-tank fortifications.
  2. The explosive delivery and deployment device must be removable and suitable for installation on a mass production tank, by field workshops if necessary.The following changes are allowed by the GABTU, on the condition that they do not impede the tank's function:

Tuesday, 12 September 2017

Dome Turret

"Red Armyman A.A. Pimenov
Senior Lieutenant E.F. Polushkin
2nd Independent Training Automotive Regiment, Gorkiy

To the People's Commissar of Defense, comrade Stalin

Keeping in mind the important role of armoured vehicles in modern armies, with all due respect to high quality tanks used by our Red Army, which successfully smashes our enemies, the fact that the superiority of our equipment is only relative.

Inspired by our duty to tirelessly serve our Motherland, we, Senior Lieutenant Polushkin and Red Armyman Pimenov, based on our experience in the Patriotic war, tasked ourselves with contributing suggestions to the undertaking of the great Soviet people and their allies in the fight against the dark forces of fascist aggression. 

Lend Lease Impressions: Submachineguns

"11.43 mm Thompson submachinegun M.1928

11.43 mm Thompson submachinegun 

The submachinegun has two types of magazines: 20 round box magazine and 50 round drum magazine.

Significant drawbacks of the Thompson submachinegun include its weight (4.88 kg without a magazine and 7.12 kg with a 50 round magazine) and sensitivity to low temperatures. The 11.43 mm caliber is also high, which limits the amount of ammunition that can be carried (an 11.43 mm round is almost twice as heavy as a domestic submachinegun round).

The following is a comparison of main data of the American Thompson, Reising, German mod. 38 and 40, and our 7.62 mm mod. 1941 submachinegun.

Sunday, 10 September 2017

Metamorphoses of an Amphibian Scout

An unusual modification of the T-38 can be seen in the outdoor display of the Central Museum of the Armed Forces of the Russian Federation. This vehicle is distinct from its brothers: instead of one DT machinegun, its turret houses a 20 mm TNSh autocannon and a coaxial DT machinegun. Some Russian historians spread the myth that this tank was experimental. In reality, not only was this not an experimental tank, but these tanks had the chance to fight. This article will cover modifications of T-37 and T-38 amphibious tanks.

Saturday, 9 September 2017

T-37 and T-38 with ShVAK



"To OKB-15 director, comrade Shpitalniy

Kaganovich factory (Khabarovsk) plans to arm 400 T-37 and T-38 tanks with a ShVAK gun and a coaxial DT machinegun.

I ask you to take this project under your supervision and urgently send your representatives to the Kaganovich factory.

Consider that, due to the small amount of space in these vehicles, it might be necessary to replace the autocannon's belt feed with a magazine one.

GBTU TU Chief, Engineer-Colonel, Afonin
GBTU TU 4th Department Chief, Engineer-Lieutenant-Colonel, Nenarokov"

Friday, 8 September 2017

Failed "Laser" Tank

In the first half of the 20th century, the aircraft industry gathered up all technical and scientific achievements. Airplanes were the first to try out new materials, new engines, equipment, and armament. From time to time, tank designers had the chance to use something that was designed for aviators. The attempt to install the ShKAS aircraft machinegun on Soviet tanks in the mid-1930s was one such occurrence.

Thursday, 7 September 2017

SVT as a Sniper Rifle


"Description of the issue:

Proving grounds and battlefield tests of self-loading sniper rifles developed by factory #314 based on approved and prototype blueprints revealed unsatisfactory shot groups, and significant deviations of the first and second bullets from the dispersion ellipse.
Both drawbacks are caused by design flaws in the rifle and scope mount.
Attempts by the factory to improve groupings with small design proved fruitless, as reducing dispersion and preventing the 1st and 2nd bullet from deviating too much requires significant changes to the rifle and scope mount.
Since, currently, the 7.62 mm model 1891/30 sniper rifle with the PE scope is being manufactured, and a scope mount for the PU scope for the same rifle is under development, it is reasonable to cease production of 7.62 mm self-loading rifles with the PU scope, provided that proving grounds trials of the model 1891/30 rifle prove satisfactory.

Decisions of the Artillery Directorate of the Red Army:
1. Finish trials of the PU scope mount for the model 1891/30 sniper rifle no later than August 20th, 1942.
2. If results are positive, cease production of self-loading sniper rifles starting on September 1st.
3. If the self-loading sniper rifle is removed from production, increase production of model 1891/30 sniper rifles."

Via Andrei Ulanov.

Wednesday, 6 September 2017

Tetrarch Overview

"Office of the Commander of the Armoured and Mechanized Forces of the North Caucasian Front
August 9th, 1943

To the GABTU BTU Chief, Engineer-Colonel Afonin

In reply to your inquiry, I report the tactical-technical characteristics of the British MK-7 tank:
  1. Full weight: 8.0 tons
  2. Main dimensions:
    1. Length: 4.0 m
    2. Width: 2.4 m
    3. Height: 2.17 m
    4. Clearance: 0.4 m

Tuesday, 5 September 2017

KV-1S Road Wheels

"Report on KV-1S Road Wheels

Kirov factory KV-1 tanks used cast road wheels with Г-shaped rims. As a part of the total requirement for weight reduction, the weight of the road wheels would be reduced by changing the shape of the rim. A T-shaped rim was selected, which gave the same robustness at less weight.

Two of the first KV-1S tanks produced at the Kirov factory, #15001 and #15002, with T-shaped road wheel rims, ribs, and round openings in the disks were provided for trials.

Monday, 4 September 2017

Tank Trailers

"Minutes of a meeting at the 5th Department of the GABTU BTU with representatives of tank units on the issue of trailers for tanks proposed by factories #592 and #112

The meeting was led by the Chief of the 5th Department of the BTU, Military Engineer 1st Class, comrade Afonin.

Afonin: We gathered representatives of tank units by order from Army Commissar 2nd Class Biryukov to discuss the proposal of engineers from factories #592 and #112 to build trailers for tank riders. [Reads proposal from factory #112 and explains technical issues connected with factory #592's proposal].

Saturday, 2 September 2017

Swedo-Polish Tank Killer

Germany invented specialized anti-tank artillery before the end of WWI. It is not surprising that German anti-tank guns became some of the best known in their class. A German gun served as the starting point for the famous Soviet 45 mm anti-tank gun. The use of the German 3.7 cm Pak in Spain triggered the development of tanks with shell-proof armour in the USSR. However, another gun gave an even more powerful impulse to the strengthening of tank armour, built in neutral Sweden. Swedish 37 mm anti-tank guns were also used in Spain, and continued serving until the end of WWII.

Friday, 1 September 2017

Trophies from Galicia

Starting with the late 1930s, testers in Kubinka began receive foreign vehicles from all corners of the world to try on for size. The first to come were trophies captured in Spain during the civil war, but the floodgates opened in 1939. The first to come was the Japanese Ha-Go tank, and Polish vehicles came after that. One of them was the TK-S tankette.

Thursday, 31 August 2017

Mosin Suppressor



"This suppressor, designed by comrades Barnas and Glinin, has a cigar-like shape (see photo #1) and consists of two parts, connected with a tread at the point of the suppressor where the diameter is the largest.

Photo #1 shows the suppressor."