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Many modern tank guns are smoothbore, not rifled because practical rifling twists can only stabilize projectiles, such as an armour-piercing, capped, ballistic cap, with a length-to-diameter ratio of up to about 5:1 and also because the rifling adds friction, reducing the velocity and thus total force it is possible to achieve.
Bolt thrust is an important factor in weapons design. The greater the bolt thrust, the stronger the locking mechanism has to be to withstand it. Assuming equal engineering solutions and material, adding strength to a locking mechanism causes an increase in weight and size of locking mechanism components.
Diagram of internal ballistic phases. The burning firearm propellant produces energy in the form of hot gases that raise the chamber pressure which applies a force on the base of the projectile, causing it to accelerate. The chamber pressure depends on the amount of propellant that has burned, the temperature of the gases, and the volume of the ...
Electrothermal-chemical (ETC) technology is an attempt to increase accuracy and muzzle energy of future tank, artillery, and close-in weapon system [1] guns by improving the predictability and rate of expansion of propellants inside the barrel.
[4] [5] [6] The Kistler ballistic pressure measurement sensor 6215 has a maximum working pressure of 600 MPa (87,023 psi) and is mounted recessed inside the cartridge case (the face of high-pressure sensor does not contact the cartridge case) and requires that the test cartridge case have a hole drilled in it prior to testing. The test ...
Armour piercing discarding sabot munitions were developed to increase penetrating performance of anti-tank projectiles by generating higher impact velocity.A larger projectile would require a completely new weapon system, but increasing velocity faced the limitation that steel armour-piercing (AP) projectiles shattered at velocities above about 850 m/s when uncapped.
During firing, the chamber pressure rises from atmospheric pressure to, in a typical rifle cartridge, pressures of about 340 megapascals (50,000 psi) within microseconds. This rapid increase in pressure causes the barrel to vibrate at a certain natural frequency, much like a tuning fork. The point in time at which the bullet exits the barrel ...
The Pzgr. 39 was an APCBC [1]-HE-T design.It consisted of the shell body that was armour penetrating (AP) using a cap (C) to increase performance against sloped armour, a ballistic cap (BC) to increase aerodynamic performance along with a high explosive (HE) filler and tracer unit (T) that was incorporated into the base fuze.