Advantages and disadvantages of air guns
For aircraft machine guns are requirements: minimum weight, minimum air resistance of individual parts and the highest rate of fire.
Used in the Air Force. guns are divided into normal-caliber machine guns (7-8 mm) and heavy (11-13 mm).
Machine gun installation are divided into fixed - gun rigidly fixed and can only fire in one direction relative to its plane, and mobile - a machine gun -can form with the axis of the aircraft angle depending on device support and the permissible zone of fire.
Fixed a machine gun mounted on the front part of the fuselage, behind the square, Neaten screw, called a front, or a machine gun firing through the propeller. It is provided with a machine-gun drive, which establishes the connection of the trigger gun devices to the motor shaft. Shot occurs only at the moment when the screw will pass by the barrel of a machine gun.
Aviation gun photo
Number of fixed machine guns mounted in the fuselage, ranging from up to 1 4.
Wing machine guns mounted in the planes of the aircraft outside the scope of the propeller. In most cases, their number ranges from up to 2 8. Office machine guns concentrated at the pilot on the handle control of the aircraft.
Advantages of the wing machine guns:
- a) the ability to set a large number of machine guns and the increasing power of the fire;
- b) completely retained the rate of fire from a machine gun;
- c) no danger hang fire;
- d) eliminating the need to adjust the time of the shot and continuous monitoring of the accuracy of this adjustment.
- a) Position large dissipation due to vibration gun together with vibration of an aircraft wing;
- b) unfavorable location relative to the trajectory of the line of sight due to the large spacing of machine guns from the vertical plane passing through the longitudinal axis of the aircraft, and the significant removal of guns from the sight vertically;
- c) the need for special adaptation device for reloading a machine gun or eliminate delays from the cockpit.
When shooting still the pilot aim with guns all aircraft through the sighting devices installed directly in front of him.
The mobile units are divided into bow, stern, tail, subcortical, and wing hatch.
The movable machine guns mounted through a ball joint or a pin on the turret or just on the pin (called a pivot pin, allowing rotation of weapons and making it tilt, the turret is called an annular support, allowing twist arms on 360 ° in the horizontal plane). Installing the turret is called the turret and is open or closed; in the latter case, it is covered with a cap for the loan you arrow from the air stream. If the gun is mounted on a plane directly through the pin (without turret), this setting is called the pivot. The latter include the installation hatch, that is. e. means for firing through the hole (manhole) cabin floor.
The most typical examples of machine guns, the armament of the Air Force some capitalist armies.
Ckorostrelnost best systems of fixed guns reaches 1 000-1 200, and mobile guns 1 200-1 500 rounds per minute. By penetrating the seal of the foreign press reports, at the stage of testing
are guns with a rate of more than 3 000 rounds per minute.
Machine gun bullets being: ordinary, armor-piercing, tracer, armor-piercing tracer and incendiary. Caliber machine gun bullets are srednekalibernye and heavy.
The experience of modern warfare shooting is mixed with all kinds of bullets.
Ordinary bullets caliber mm 6,5, 7,62 mm, 7,92 mm characterized by transverse load of about 20 g / szh3 at an initial rate of over 800 m / s. It is fired at a relatively small distance, the nose (to 3 000 g). The defeat of the crew may at a range of 1 400 m.
Heavy caliber bullets 7-9 mm. have a transverse load of about 25 g / szh3. When shooting outdoor living purposes maintains a heavy bullet stopping power at a distance of up to 5 100 m (maximum distance). The defeat of the crew may at ranges up to 1 800 m. The range of direct shots on goal in 1 m height - 600 m. When you hit a hard shot ivy as well as ordinary.
The advantage of the heavy bullets to light - less time bullet at long range and a large force of impact.
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