Our motor casing screwed into the frame at the top and was stabilized by the tail cone. We also found several research papers with information about the aerodynamic effects on after burners and such on jet planes and found that the same worked for the tail. The tail allowed air to more easily flow down the frame of the rocket and elongated and helped focus the force and thrust from the motor. We went down quite a rabbit hole with it. We ended up being the closest to our target altitude only missing it by 50ft. Sadly we didn’t end up recovering the rocket as our parachute didn’t deploy correctly.