Roll Orientation

Roll Orientation

Roll Orientation is as follows (Looking at the projectile from behind). For Zero-degree roll orientation the thrust or lift vector generated is pointed upwards. Reading counter clockwise, 90 degrees would have the vector coming from the left, 180 degrees would have the vector coming from the top while 270 degrees would have vector coming from the right. Roll combined with the center of gravity and center of pressure of the fin set will determine whether it is a nose up or nose down type of maneuver.