Formula A (Standard Units)

W * V² = K * D^{3 (t/d)^n}

Equation Explained

• W = Projectile Weight (pounds)

• V = Projectile Velocity (ft/sec)

• D = Projectile Diameter (inches)

• t = Thickness of Armor plate only just perforated (inches)

• d = Constant; dependent on projectile/armor plate types. Usually is 10⁶.

• n = index; normally 1.414