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USA 8"/55 (20.3 cm) Marks 12 and 15 - NavWeaps

Similar in construction to the previous 8"/55 (20.3 cm) Mark 14, but of much lighter construction. These guns were used in two distinct mountings. The triple mounting used on the Tuscaloosa (CA-37) and San Francisco (CA-38) sub-class were similar to those used on their sisters of the New Orleans (CA-32) class, but these much lighter guns gave them a significantly lower revolving weight. The Wichita (CA-45), Baltimore (CA-68) and Oregon City (CA-122) classes had greatly different mountings from previous heavy cruisers. //  Дальше — www.navweaps.com

 

In the late 1960s the "Gunfighter" program at Indian Head Naval Ordnance Station developed Long Range Bombardment Ammunition (LRBA) projectiles. These were Arrow Shells with a body diameter of 4.125" (10.4 cm) and a fin diameter of 5.0" (12.7 cm) which were sized to be fired from 8" (20.3 cm) guns by using a sabot and obturator system. Tests with these in 1968 showed maximum ranges of 72,000 yards (66,000 m). The burster in these shells was PBX-w-106, a castable explosive. Sabot weighed 17.6 lbs. (8.0 kg) and was discarded as the projectile left the muzzle. After a test firing off Okinawa of three inert-loaded shells, USS St. Paul (CA-73) in 1970 conducted a two day bombardment mission against Viet Cong positions at ranges up to 70,000 yards (64,000 m).

 

 

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