Rodman gun

The Rodman gun is any of a series of American Civil War–era columbiads designed by Union artillery officer Thomas Jackson Rodman (1815–1871). The guns were designed to fire both shot and shell. These heavy guns were intended to be mounted in seacoast fortifications. 8-inch, 10-inch, 13-inch, 15-inch, and 20-inch bore Rodman guns were produced. Other than size, the guns were all nearly identical in design, with a curving bottle shape, a large flat cascabels, and ratchets or sockets for the elevating mechanism. Rodman guns were true guns that did not have a howitzer-like powder chamber, as did many earlier columbiads. Rodman guns differed from all previous artillery because they were hollow cast, a new technology that Rodman developed that resulted in cast-iron guns that were much stronger than their predecessors.

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Rodman cannon
columbiad, 

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Frameless

RodmanGun

Rodman Guns

Breech

Rear view of ten inch Columbiad showing its range of fire down the James River above Dutch Gap Canal

Fort Jay gun placement east gate HABS NY,31-GOVI,1-23

Cannonballs fir the 15" Rodman Ammunition gun at Fort Mason, looking towards Alcatraz, c1869.

15in Rodman gun, rear view

Rodman gun - Centennial Exposition - 1876 - Project Gutenberg eText 14333

RodmanNPSImage14

RodmanRatchet

Type	Subtype	Date	Description	Notes	Source
commons	image		RodmanGun		Commons
commons	image		Rodman Guns		Commons
commons	image		Breech		Commons
commons	image		Rear view of ten inch Columbiad showing its range of fire down the James River above Dutch Gap Canal		Commons
commons	image		Fort Jay gun placement east gate HABS NY,31-GOVI,1-23		Commons
commons	image		Cannonballs fir the 15" Rodman Ammunition gun at Fort Mason, looking towards Alcatraz, c1869.		Commons
commons	image		15in Rodman gun, rear view		Commons
commons	image		Rodman gun - Centennial Exposition - 1876 - Project Gutenberg eText 14333		Commons
commons	image		RodmanNPSImage14		Commons
commons	image		RodmanRatchet		Commons