%0 Journal Article
%T Estimating projectile perpendicular impact velocity on metal sheet targets from the shape of the target hole
%J Journal of forensic sciences
%D 2009
%A Tsach, Tsadok
%A Landau, Eliezer
%A Shor, Yaron
%A Volkov, Nikolai
%A Chaikovsky, Alan
%V 54
%N 1
%P 77-83
%X The correlation between bullet hole shapes in metal and projectile impact velocity was examined. A series of shots were fired from an M-16A1 assault rifle of 5.56 mm caliber toward a 1-mm thick metal target. All shots were fired at a perpendicular angle to the metal sheets, and the velocity was measured just before the projectile hit the target. Velocities ranged between 400 and 900 m/sec. From the replica of the shooting hole, a perpendicular plane was created, showing the symmetrical properties of the hole. The best mathematical equation describing the shape of the entrance hole was the exponential function in the form: Y x = A + Be kx. The empirical equation of the hole defined using the regression method is: Y x,V = 8.268/V 0.578018 e(0.584x/V0.005). This equation describes the general shape of shooting holes created by velocities ranging from 440 to 750 m/sec. From this equation, one can estimate the bullet velocity when it hits the target.<p /> <p>Language: en</p>
%G en
%I John Wiley and Sons
%@ 0022-1198
%U http://dx.doi.org/10.1111/j.1556-4029.2008.00930.x