Inbore Ammunition Balloting


Balloting refers the lateral disturbances during projectile travel inside the barrel. Balloting results in significant ‘yaw-rate’ for the projectile as it exits barrel. In order to obtain desired accuracy & consistency in ammunition trajectory, one needs to minimize the balloting motion. The source of in-bore disturbances are ‘out-of-control’ conditions such as shot eccentricity, barrel wear / bend and shot concentricity /start angle. Balloting is simulated by solving governing equations of projectile longitudinal motion, driving band stiffness, bourrelet-barrel impacts and lateral motion-pitch coupling. Upon input of projectile and barrel data, the software outputs time history plots of lateral motion, bourrelet impact magnitude and exit yaw rates.

Run with default values or select the Input file

Run with default values or select Pressure-Time profile file