# The tractability condition

## Abbreviations

 f Tractability factor fl Low limit tractability factor; fl » 5.7 sg Gyroscopic stability factor dp Yaw of repose vector

## 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.