History[edit]

Armour-piercing discarding sabot (APDS) was initially the main design of the kinetic energy (KE) penetrator. The logical progression was to make the shot longer and thinner to concentrate the kinetic energy in a smaller area. However, a long, thin rod is aerodynamically unstable; it tends to tumble in flight and is less accurate. Traditionally, rounds were given stability in flight from the rifling of the gun barrel, which imparts a spin to the round. Up to a certain limit, this is effective, but once the projectile's length is more than six or seven times its diameter, rifling becomes less effective.[citation needed] Adding fins like the fletching of an arrow to the base gives the round stability. The spin from rifling decreases the effective penetration of these rounds (rifling diverts some of the linear kinetic energy to rotational kinetic energy, thus decreasing the round's velocity and impact energy) and so they are generally fired from smoothbore guns, a practice that has been taken up for tank guns by China, Israel, Italy, Japan, France, Germany, Turkey, Russia, and the United States.


중궈 낙지라엘 파스타 스시 빵국 덕국 케밥 보드카 양키 다있는데 정작 한국은 없구만


터키나 이딸, 좆본도 있는데 머한이 없는건 역시 존재감이 없어서겠지


이래뵈도 k279 55구경장 쏘면 2키로에서 750~800 가량 나올텐데