发射初速 [
fā shè chū sù]
launch velocity
- 结果表明,发射药燃速压力指数的大小及其随压力的变化规律对内弹道性能有很大的影响,对于燃速压力指数随压力升高而减小的新型高能发射药,可获得较高的内弹道示压效率,降低膛压和弹丸初速对发射药装填条件的敏感性。
The results show that the value of burning rate pressure exponent of propellant and its change law can bring about a great change of interior ballistic behavior, The new type high-energy propellant whose burning rate pressure exponent is decrescent as pressure increasing can obtain higher interior ballistic piezometric efficiency, and reduce the sensitivity of bore pressure and muzzle velocity on loaded conditions of propellant. - “大威力”APX型75毫米炮由1929型要塞炮(旧式1897型野炮的发展型)衍生而来,加装了半自动炮尾和一个自动装填器,发射减装药的1915型高爆弹(初速400米/秒),及1915型穿甲弹(初速570米/秒,1000米距离可穿透50毫米装甲)。
Derived from the 1929 fortress gun (itself a development of the old 1897 field gun) with a semi-automatic breech and an automatic loader added, the "high power" APX 75mm gun fired a mle 1915 HE round with a reduced charge at 400 m/s and the mle 1915 AP round at 570 m/s (50mm penetration at 1000 m) and its two sights and stereoscopic rangefinder allowed a direct fire range of 2000 m. - M16步枪508毫米的枪管发射后,碎片效果只在150米到200米的距离内出现,而M4卡宾枪368毫米的枪管使用了低初速枪口,将碎片有效距离减少到了50米到100米。
From the 508 mm barrel of the M16, the fragmentation effect lasts out to 150 m to 200 m but the short (368mm) barrel of the M4 develops a lower-muzzle velocity, pulling the fragmentation limit down to 50 m to 100 m.
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