Sky Screen Data Reduction to Obtain Muzzle Velocity and Linear Drag Coefficient.
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER DOVER NJ ARMAMENT ENGINEERING DIRECTORATE
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For most of the tank projectile test firings, sky screens are used to obtain the flight time as a function of range. These range data can be used to extract muzzle velocity, velocity decay, and drag coefficient. An analysis and associated computational technique were developed to extract muzzle velocity, velocity decay, and drag coefficient from the sky screen data. This technique uses the advantage of a closed form solution to the equation of motion for a flat fire antitank projectile. The only limitation of this technique is that the drag coefficient must be a linear function of velocity. However, the results show that this technique obtains excellent velocity decay even with slight nonlinearity in the drag coefficient.