The tractability condition

Abbreviations

f	Tractability factor
f_l	Low limit tractability factor; fl » 5.7
s_g	Gyroscopic stability factor
d_p	Yaw of repose vector

More abbreviations

Explanation

The tractability factor f characterizes the ability of the projectile's longitudinal axis to follow the bending trajectory (see figure

). The quantity f can simply be defined as the inverse of the yaw of repose. It can be shown that the tractability factor f is proportional to the inverse of the gyroscopic stability factor.