6"/53 caliber gun 6"/53 caliber gun The 6"/53 caliber gun (spoken "six-inch-fifty-three-caliber") formed the main battery of some United States Navy light cruisers and three US submarines built during the 1920s. United States naval gun terminology indicates the gun fired a projectile 6 inches (15 cm) in diameter, and the barrel was 53 calibers long (barrel length is 6 inch x 53 = 318 inches or 8 meters.) The gun with side swing Welin breech block and Smith-Asbury mechanism weighed about 10 tonnes and used a silk bag containing 44-pounds (20 kg) of smokeless powder to give a 105-pound (47.6 kg) projectile a
Time Person of the Year having aviator Charles Lindbergh on its cover following his historic trans-Atlantic flight. By the end of the year, it was decided that a cover story featuring Lindbergh as the Man of the Year would serve both purposes. Since the list began, every serving President of the United States has been a Man or Person of the Year at least once with the exceptions of Calvin Coolidge (in office at time of the first issue), Herbert Hoover (the subsequent U.S. President), and Gerald Ford. Most were named Man or Person of the Year either the year they were elected or while