
360 Ballistics: Theory and Design of Guns and Ammunition
Thus, the fast mode will always damp for this projectile. Examination of Figure 13.1 reveals
that as long as the projectiles yaw angle is below 5.73°, the slow arm will damp to zero
(recall that the yaw angle is equal to sin(δ)); above this angle, it will grow without bound.
Although this angle is fairly large for a projectile, there have been instances documented
where a slowly launched missile was stable when red from one side of a fast warship,
but unstable when launched from the other [2,8]. The instability was caused by the vector
addition of the ships own speed with the launch velocity ...