CS242998B1 - Uniform podkaliberní catapulted rotating bullet for barrel with smooth bore - Google Patents

Abstract

The invention falls into the field of hunting shooting and the field of smooth-bore weapons. The front and rear parts of the catapult are provided with guide ribs arranged in helices with opposite pitch. The front guide ribs serve to spin the catapult and the projectile against the air. The rear guide ribs cause the catapult to spin using the escaping gases resulting from the combustion of gunpowder. The transfer of rotation from the catapult to the projectile is carried out with the help of carriers that are part of the catapult. The stability of the projectile when separating the catapult from the projectile is increased by the fact that the catapult is braked against the air by braking chambers located behind the center of gravity of the projectile. The invention can be used in hunting shooting, or possibly also with other firearms with a smooth-bore barrel.

Description

BACKGROUND OF THE INVENTION The present invention relates to a subcaliber catapulted rotating projectile for a barrel with a smooth bore consisting of a projectile, a lightweight and flexible catapult having a projectile bearing cylindrical surface and front guide ribs arranged in a helix.

Until now, podka11berních Missiles and thus less podkaliberních rotating missiles in hunting shotguns commonly used, although the literature is known different types of podkaliberních rotating missiles.

Normally produced only uniform missiles, whose caliber corresponds to the bore of the barrel, so it is not podkaliberní missile. Such a large-caliber bullet carries considerable disadvantages.

Due to its size, it is very massive and cannot reach a higher initial velocity.

Another disadvantage of large caliber is the large frontal surface, which causes a large frontal resistance and the result is a large loss of speed when the missile passes through the air. Since in the past and mostly today, these weapons have grooved barrels, this missile also gained rotation around the axis of minimum moment of inertia and thus the necessary stability for air passage. However, a normal sub-caliber projectile for the smooth barrel would not obtain rotation.

According to the invention, the above-mentioned drawbacks are eliminated by a uniform sub-caliber catapulted rotating bullet for barrels with a smooth bore consisting of a projectile, a light and flexible catapult, provided with a projectile bearing cylindrical surface and front guide ribs arranged in a helix.

Its essence is that the projectile is provided with grippers guided in the grooves and rear guide ribs having the opposite sense of helical pitch, the front guide ribs terminating in brake chambers located behind the center of gravity of the projectile.

The basic effect of the missile according to the invention is to substantially reduce the front surface of the catapult and hence its frontal air resistance and shift the braking effect beyond the center of gravity of the projectile and in its reinforcement by the braking chambers.

This makes the catapult considerably more stable when detaching from the projectile by the air braking effect. Furthermore, with helical guide ribs, the catapult and projectile are rotated by means of grippers on the projectile and grooves in the catapult.

The uniform sub-caliber catapulted rotating bullet for the barrel with a smooth bore with radial guide ribs in the front and rear of the catapult is further described by way of example with reference to the drawing, in which Fig. 1 shows a partial section through a bullet; Fig. 3 is a rear view of the projectile; Fig. 4 is a section along line AA; and Fig. 5 is a section along line BB.

The uniform sub-caliber catapulted rotating bullet for barrels with a smooth bore consists of a projectile inserted slidingly into the bearing cylindrical surface of the catapult. The projectile 1 has, on its surface, grippers 5 which are guided in the grooves 6, thereby ensuring the transfer of rotational movement from the light catapult to the projectile. The catapult is provided on its surface with front guide ribs 5 which are as high as possible and terminated chambers T which are located downstream of the center of gravity of the projectile and are intended to ensure separation of the light catapult from the projectile 1 with increased separation stability.

The front guide ribs arranged in the helix ensure rotation of the projectile as it penetrates the air, prior to separation of the catapult and projectile 7. The rear guide ribs 6 are also arranged in a helix, but with an opposite pitch.

These rear guide ribs 6 rotate the projectile as they release the barrel and thus begin to overtake the freely expanding combustion gases from the gunpowder, before the front guide ribs 5 are effective.

Single podkaliberní catapulted rotating bullet for barrels with a smooth bore finds use in hunting shooting or other weapons with smooth barrel.

Claims (1)

SUBJECT OF THE INVENTION Uniform subcaliber catapulted rotating bullet for barrel with smooth bore, consisting of a projectile, a light and flexible catapult provided with a cylindrical bearing surface for the projectile and front helical ribs, characterized in that the projectile (1) is provided with carriers (2) guided in the projectile. grooves (4) and rear guide ribs (6), which have the opposite sense of helical pitch and guide ribs (5) are terminated by braking chambers (7), located behind the center of gravity of the projectile.