PCA-41 Machine: the device and specifications

Many have probably heard such an expression as "weapon of victory." It is important in the history of the Soviet people. This expression has united all kinds of weapons that have assisted our country in the victory over the Nazis and became a true symbol of the Russian soldier. It also includes a tank T-34, anti-tank gun, legendary installation volley fire "Katjusha" and definitely submachine gun Shpagina aka "PCA 41" - automatic device, the drawing and description are given in the text.

History

From the experience of the war in 1939-1940 between the USSR and Finland and then standing on the sub-machine gun Degtyarev arms cleared a certain fact. He lay in the fact that the Red Army had to be equipped with automatic models and organize accordingly, their mass production. "PDP-40" and "PDP-38" (sub-machine guns Degtyarev) were not suitable for these purposes because they were labor intensive, required a considerable number of machine tools for their production. they also had material shortages and high costs. To replace the "PPD" it was necessary to develop a new, cheap and easy as possible submachine gun. This is an important question.

In 1940, we announced a competition for the invention of a new sub-machine gun. Tests have identified two main rivals. They were Shpitalnaya BG and GS Shpagin. Their models have been quite promising. I won Shpagin. Has been adopted its version of 12.21.1940, the total of his name was: "SMG Shpagin 7 system, 62 mm mod. 1941 (Machine "PCA 41"). " This is a significant fact.

In the mass production of "PCA 41" - the automatic device, the drawing and description of which are given in the text below, entered during the autumn of 1941 Namely - at the climax of the war period, when in such a badly needed weapons the Red Army. Due to the fact that a device such as machine "PCA" was a simple design, not used alloy steel and complex special tools, release it has been deployed in many enterprises of the country, previously specialized in the production of arms. Bulk items such as a weapon automatic "SCB", produced by cold forming method using electric and spot welding. The most difficult and expensive part is a drum magazine. It was borrowed from the "PPD", to which the operation has been a lot of complaints. It's a bit delayed the release of such weapons as the "PCA" - automatic, which drawings are provided for reference below. After upgrading the replaced sector drum magazine capacity on cartridges 35 and the corresponding sight -. On rocker having a shooting range of 100 m and 200 During the war years it was released about 5, 4 milliona SMGs Shpagina. In the weapon equipment works thanks to the impact of free shutter. When firing bore locked mass free shutter which is urged by a spring (reciprocating combat).

The device mechanism the trigger type was such that thanks to him, it was possible to carry as a firing single shots and machine gun. Removable drum-type magazine was designed for cartridge 71, as in the sub-machine gun Degtyarev ( "PDP"). Adaptations for guidance consisted of an open sector of the sight and foresight. Fuse slide type shutter is located on the handle. This is an important detail. Also in this case there was the presence of the combustion mode switch slide type.

"PCA" machine: characteristics tactical and technical

, the - 1941-1947, the

Weight - without magazine 3, 6 kg, with loaded -. 5, 3 kg.

Length is 843 mm.

Caliber - 7, 62 mm.

cartridge - 7, 62 * 25 TT.

maximum range - 400m.

Rate -. 1000 rds / min.

Range sighting from 200 to 250m.

Shop: drum - 71 cartridge, sector - 35.

machine drawings "PCA 41"

As already mentioned, they are designed by the Soviet designer GS Shpagin. They are shown on the following photo.

design

Is the "PCA" automatic firearm handgun. It is designed for firing single shots and bursts. Powered Automatic recoil due to free the valve. This important feature in this case. In other words, charge and liner extraction occurs after firing due to return of the loose valve. Firing from the rear sear, ie before firing the shutter is located in the rear end position. Then, after the descent, he goes forward, then it shall be sent cartridge. Prick the capsule takes place upon completion of the last trial. During firing the shutter is not fixed.

Such a scheme is often used in the design of devices such as sub-machine guns. For example, "Uzi" Israeli-made works on a similar principle. At the absolute simplicity of such a solution requires the use of a massive bolt type, which increases the total weight of the weapon. In addition, weapon which uses such a recharging circuit can be fired by the strong impact, for example when dropped. If the blow valve from the front edge (non-fixed) position along the guide rails on the windows rolled away from the cartridge supply store or from the rear end, it will be broken to stop.

As Degtyareva weapons, in a device such as machine "PCA", are: receiver, which is fused with the housing bore, loose massive gate on the handle which is charging fuse disc magazine. He also has a wooden lodge. But with all this, "PCA" -automaton is more technological. In this model, in the mechanical precision machining needs only the trunk, and the shutter was made on a lathe with a further rough milling. In such weapons as "PCA" (automatic), the production of almost all the other metal parts can perform stamping. Here in the barrel jacket has a recoil compensator at the front end. That is, in this case there is a ramp plate, which has an opening for the passage of bullet. By her side in the casing has a through-window. They, thanks to the action of a jet of propellant gases on firing, substantially reduce the recoil effect and "scoring" up shaft. At the sight of this model there are only two positions. Namely -. 200 and 100 m "PCA" in 1942 completed the disk did not shop, and the sector (boxed) to 35 rounds.

This is dictated by the specific conditions. Namely, the fact that the disk-type shops have been in the production of complex, less reliable. They also demanded a specific instance of the fitting machine. That is this item from another of the same "PCA" could not come. Judging by the war photographer, box-type stores in the army found only in 1944. Referred to as "PCA" machine look at the device in detail.

trunk

Inside this part there is a channel with four rifling. They curl up from left to right. There is also a chamber with pooled entrance. It is in the lower part has a certain slant. It is - to set the direction of movement of the cartridge in the chamber.

This trunk outside contains:

In front of the - rounding. This is to protect against nicks.
thicker portion. For placing in the receiver.
The removal semicircular on the thickened part. This is to ensure that the trunk was fixed in the relevant box.
Projection ring. In order to limit the process of moving the barrel when you return to a place. This also ensures reduction perception shutter punches.

receiver

This element is a base. He posted the following details:

- namushnike a beauty spot.

- sight.

- Latch receiver.

- swivel.

In the front part of the receiver is a cover, and the back - cover slide boxes.

In general, the receiver is composed of:

- flies Grounds for fixing it namushnike.

- swivel belt anchorages of the shoulder type.

- Pads sight.

- Inserts for guiding the stem.

- The front inclined plane housing. It is a muzzle brake.

- Cut-out on the longitudinal housing. This is to improve and facilitate the circulation of air. - The windows in the muzzle brake to ensure the release of gunpowder gases.

- transverse hole for the connecting shaft.

- windows to eject casings.

- Stop latch spring.

- the lower lip. This is to limit the lowering of the rear area of the receiver.

- Cut-out fuse.

- two lateral ledges (to limit movement of the latch).

- Cut-out for the bolt handle.

Latch box receiver

This element consists of the following parts:

- Cap.

- Springs.

- Studs.

In the cap includes: a hook with an inclined plane; upper semicircular protrusion; 2 lateral holes to pin held; bends, thanks to which it is directed, and the movement is limited to moving it forward; the notch on the back for easy opening.

A spring latch is an original item. It carries out a specific function. In this case, it is a short cylindrical coil spring.

Box gate

This item has:

- a kind of lugs for connection to the receiver.

- Cut-out for a shop with a window.

- Paz for vertical magazine catch.

- collars for connection to the trigger box and the front of the lodge.

- Window for dissociating.

- Hole for shopping latch axis.

- Window to sear lever escapement type.

- Hole for oval protrusion located at the back of the shutter box.

- a window (to hook the latch receiver).

- Tail with an opening for the corresponding screw.

- Window to the guide rod.

You should also know that inside the slide box in its front part is attached reflector. He has a certain stiffness.

Shutter

In this assembled element arranged following parts:

- Drummer with a wedge.

- Ejector with spring.

- Handle.

- fuse with the spring and gnetkom. the shutter itself comprises the following parts:

- A cup to place the cap sleeve.

- a vertical groove for the ejector.

- A platoon of combat contact with the sear.

- a longitudinal groove for the ejector spring.

- Notches side. They facilitate the movement of the gate, dirt and grease from the collection.

- Cross-section of the rear to prevent the strike latch receiver of the hat.

- Channel to the rod for the spring-back type of combat.

- rammer cartridge.

- groove for the reflector passage.

- Channel hollow in the cup for a drummer.

- The groove cross-jack and workpits on the handle to place the fuse with a spring and gnetkom.

- Channel cross wedge drummer.

The composition of the return mechanism

These include:

The guide rod with the corresponding washer.
The back-mainspring.
Shock Absorber.

The composition of the trigger

In this case it requires:

Drummer with a wedge.
The back-mainspring.
the trigger lever with the axis.
Translate fire.
Springs aforementioned lever.
trigger.
Gnetka translator with the corresponding pin.
Springs hook trigger.
with the axis of the disconnector.
Gnetka said hook.
The bases dissociating.
Springs gnetka.
The trigger box.

Description cartridge feeder

it's pretty simple here. Feeding into the chamber cartridges provided rammer being in the gate, and store that borrowed from the "PDP".

Next - a mechanism that performs the locking channel brainstem. In this case as well, no big deal. Locking arms brainstem channel such as automatic "SCB", is carried out due to the slide mass and the urging force of the spring-back type of combat.