Search results
Results From The WOW.Com Content Network
According to Newtonian mechanics, if the gun and shooter are at rest initially, the force on the bullet will be equal to that on the gun-shooter. This is due to Newton's third law of motion (For every action, there is an equal and opposite reaction). Consider a system where the gun and shooter have a combined mass m g and the bullet has a mass m b.
Light weight non-expanding projectiles pushed at a relatively high rate of speed are also utilized, generally for close ranged applications well inside 100 yards. The light for caliber bullets will transfer energy to a given medium more rapidly, yet with consistent penetration characteristics relative to their sectional density and a constant ...
The BMP-1 is unable to engage targets using the 2A28 "Grom" gun from some hull-down positions due to its limited depression, making it vulnerable to enemy fire. [8] The limited elevation of the main gun, its lack of firepower and inaccuracy against point targets at 500–700 metres (550–770 yd) meant that it could not fight effectively in the ...
The acceleration is on the order of tens of thousands of gravities, so even a projectile as light as 40 grains (2.6 g) can provide over 1,000 newtons (220 lbf) of resistance due to inertia. Changes in bullet mass, therefore, have a huge impact on the pressure curves of smokeless powder cartridges, unlike black-powder cartridges.
Experimental research among civilians, law enforcement agencies, militaries, and ammunition companies is constantly ongoing. Factors that can influence handgun effectiveness include handgun design, bullet type, and bullet capabilities (e.g. wound mechanisms, penetration, velocity, and weight). [1]
Also, recoil can alternatively be measured by recoil velocity or recoil energy instead of by recoil impulse. An alternative formula for simplified recoil measurement which also takes into account firearm weight, gun powder weight and the velocity of the gun powder gases has been suggested: [6]
This is especially true for arrow-type projectiles, which are long and thin for low drag efficiency, but too thin to shoot from a gun barrel of equal diameter to achieve high muzzle velocity. The physics of interior ballistics demonstrates why the use of a sabot is advantageous to achieve higher muzzle velocity with an arrow-type projectile ...
Modern gun drills use carbide tips to prolong life and reduce total cost when compared with steel tips. Speed of drilling depends on the material being drilled, rotational speed, and the drill diameter; a high speed drill can cut a hole in P20 steel at 75 centimeter (30 inches) per minute. Gun drilling can be done on several kinds of machine tools.