槍口初速

Multi tool use
槍口初速(muzzle velocity)指的是枪炮发射的弹头在飛離身管出口時瞬間的運動速度,單位通常以米/秒(m/s)或英尺/秒(ft/s或fps)来表示。枪口初速可以结合弹头质量来计算枪口动能(muzzle energy)。
火器类武器的初速是由推进药燃燒而形成的高压氣體所賦予的,是衡量射擊武器技術性能的一項重要指標。相同的彈頭,初速愈大、飛行距離愈遠、動能愈大、而飛達目標的時間則愈短。
在一般的槍械或大砲中,影響初速的因素有:槍械的倍徑、發射物的質量、火藥的質量、火藥的微粒大小或形狀、發射物與槍管或砲管之間的摩擦力。
参见
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