大型戰(zhàn)列艦如何克服超大口徑主炮同向齊射產(chǎn)生的后坐力

w = B*Vo, therefore B = 1.5748

Free Recoil Velocity（自由后座速度）: Vre = (((Wp/g)+B*(Wc/g))/(Wr/g))*Vo = 37.236 fps

Recoil Energy （后座能量）= ((Wr/g)/2)*Vre^2 = 5.387*10^6 ft-lb

The rotational energy of the projectile is small by comparison and can be neglected.

彈丸的旋轉(zhuǎn)能量極小可以忽視。

The overall mechanical energy is only a part (40 to 50%) of the chemical energy of the propellant, since a considerable portion of the energy is carried off as heat by the propellant gases, or transmitted to the gun barrel.

總機械能只是發(fā)射藥化學(xué)能的40%－50%，其余部分作為熱能被燃?xì)鈳ё�，或傳遞給炮管。

Ref. Rheinmetall Handbook on Weaponry, 1982, chapter 9.

Now, with these factors in mind, here are some additional calculations.

The momentum of a single projectile can be calculated as follows:

單一彈丸的動量

Projectile momentum （彈丸動量）= (Weight of projectile/g) * Muzzle velocity of projectile （彈丸重量/重力）×炮口初速

= (2,700 / 32.174) * 2,500

= 209.80 x 10^3

Momentum of the propellant gasses can be calculated from Leo's numbers as follows:

Propellant gas momentum （燃?xì)鈩恿浚? (Wc/g) * w

= (650 / 32.174) * 3,937

= 79.54 x 10^3

Summing these:

兩者的和：

Projectile momentum + Propellant gas momentum = 209.80 x 10^3 + 79.54 x 10^3

= 289.34 x 10^3

The Free Recoil momentum calculation can be used as a check, as it should be about equal to the sum of the momentums of the projectile and propellant gasses.

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