IN-BORE YAW EFFECTS ON LATERAL THROWOFF AND AERODYNAMIC JUMP BEHAVIOR FOR SMALL CALIBER PROJECTILES FIRING SIDEWISE FROM AIR VEHICLES

摘要

The present study investigates the effects of in bore-yaw phenomenon on lateral throw-off and aerodynamic jump behavior for small caliber rotational symmetric (both in configuration and mass distribution) projectiles launched horizontally at supersonic firing speeds and various altitudes from highsubsonic air vehicles. The ammunition used is the caliber .50 API M8 bullet type firing from M2 machine automatic gun. The projectile is considered to be eccentrically engraved, tilted as it enters the rifling, and it is assumed that the tilt persists throughout its passage through the rifled barrel of the used weapon system. The modified linear 6-DOF flight simulation modelling is applied for the bullet free-flight trajectory predictions.