This paper seeks to explain physically how the Magnus and damping moments cause the dynamic instability of the projectiles, in accordance with the force system applied on the projectile, and its state of motion.

• 本文根据弹丸受力和运动情况,从物理意义上解释了马格努斯力矩和赤道阻尼力矩引起弹丸动不稳定性问题。