Analysis presented here addresses a previous problem concerning free-flight projectiles governed by the two-dimensional, point mass equations representing drag as a power law. Down-range distance is taken to be the independent variable which yields a third-order differential equation governing the projectile's flight. An approximate solution is obtained which is shown to be very accurate for gun elevation angles up to 30 degrees. Previously examined engineering characteristics for flat fire are ...
Moments that are caused by a payload assumed to be an inviscid liquid flowing in a coning projectile are predicted. This payload is contained in a uniform sequence of end-to-end cylinders stacked in columns along and off the symmetry axis of the projectile. A theoretical model is used to analyze inertial waves passing through the liquid, which are generated by the coning motion. This analysis continues by considering a single ...
Moments are predicted due to an inviscid liquid payload flowing in a sequence of end to uniform cylinders stacked in columns displaced off the spin axis of a coning projectile during free flight. These moments are then compared to moments generated by flow of the same liquid that saturates porous media contained in a sequence of uniform cylinders along the projectile symmetry axis. A modification to the classical Stewartson theory ...
An analysis of the velocity-time-range equations for direct-fire munitions has been performed. The analysis characterizes these munitions in terms of three parameters: muzzle velocity, muzzle retardation (or velocity fall-off), and a single parameter defining the shape of the drag curve. Using firing tables drag data for a variety of munitions, the expected range of values of the single parameter defining the shape of the drag curve in the supersonic flight ...
Reports by Author
