10-Inch Rodman Cannon - San Francisco, CA
Posted by: Metro2
N 37° 48.403 W 122° 24.266
10S E 552426 N 4184537
This replica is located at Pier 33.
Waymark Code: WMKX8E
Location: California, United States
Date Posted: 06/07/2014
Views: 8
This replica is located near the ferry station at Pier 33 which brings visitors to Alcatraz.
The accompanying placard informs us:
"THE 10-INCH RODMAN
The cannon in front of you is a replica 10-inch Rodman Cannon, a typical Alcatraz artillery piece of the 1860s. An actual Rodman gun and carriage was aimed, loaded and fired by a crew of eight to ten soldiers. The large wheels at the rear allowed the crew to rotate the gun right or left on circular iron rails. At the moment of firing, the gun recoiled backwards and up the inclined iron side rails. Friction and gravity made it stop. Weight of gun and carriage: 20,500 lbs. (9298 kilograms) Weight of solid cannonball: 128 lbs. (58 kilograms) Rabge with 15 lbs. powder: 2.75 miles (4.4kilometers)"
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