Mackinaw, IL, 3 inch/50 caliber Naval Anti-aircraft surface Gun
Posted by: 
dguyellison
N 40° 32.240 W 089° 21.542
16T E 300212 N 4490072
Excellant piece: Single mount 3"/50 caliber gun United States naval gun
Waymark Code: WM3R5M
Location: Illinois, United States
Date Posted: 05/09/2008
Views: 133
Very well preserved and maintained example of a 3 inch/50 caliber gun. Stamps on gun mount easily read. Memorial to PVT Emery Whisler, 122nd Machine Gun Battallion, 33rd Infantry Division, Illinois National Guard, US Army, killed in action in World War I.
The 3"/50 caliber gun (Mark 22) was a semiautomatic dual purpose anti-aircraft and surface target weapon used by the U.S. Navy and U.S. Coast Guard from the 1930s through the 1990s on a variety of combatant and transport ship classes with a power driven automatic loader that fired a fixed AA (Anti-aircraft) or HC (High Capacity) round consisting of a projectile and a cartridge case crimped to the projectile. The average weight of the round was 34 pounds. The projectiles weighed about 13 pounds including a burster charge of 0.81 pounds for the AA round and 1.27 pounds for the HC round. The initial velocity of the round was 2,700 feet/second with a maximum range of 14,600 yards at 45 degrees elevation and a ceiling of 29,800 feet at 85 degrees elevation. The gun could fire at a rate of 20 rounds/minute.
Location restrictions:
Located in a public park on the north side of Mackinaw, IL, off of Dee-Mack Road.
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