243Trajectories
Problem 18
The main armament of the last pre-war U.S. Heavy Cruisers (known as the “tin-clads”)
was an 8 in./55 cal weapon. The effective range of this weapon was 30,000 yards at
an elevation of 40°43′. During the Second World War, there were many night actions
in the Pacic where these weapons were used at an extremely short range (less than
10,000 yards). You are asked to create a ring table for this weapon at the short ranges.
The muzzle velocity of the weapon/projectile/propellant combination is 2500 ft/s. The
projectile is an APC (Armor Piercing, Capped) with a diameter of 8 in. and a mass of
335 lbm. Since the range is short, we can assume the projectile behaves according to the
at re assumption with a drag coefcient ...