The Great Guns of the Fort...

The Great Guns of the Fort... (HM18N9)

Location: Baltimore, MD 21230
Country: United States of America

N 39° 15.786', W 76° 34.747'

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The Rodman Cannons

The guns in front of you are the heaviest cannons ever mounted at Fort McHenry. The largest fired exploding projectiles weighing 440 pounds. Mass-produced they represent the "coming of age" of America's iron industry. A special process developed by Thomas J. Rodman, enabled them to cool from the inside out giving them durability and their distinctive bottle-shaped appearance.

Installed in 1866, the Army improved the Rodman Guns with rifling (grooved barrel) a decade later. The Hydraulic cylinder and bumpers coated with rubber were added in 1888. Obsolete not long after they were installed, they were fired only for ceremonies such as the Fourth of July and Defender's Day.
HM NumberHM18N9
Placed ByNational Park Service
Marker ConditionNo reports yet
Date Added Thursday, September 11th, 2014 at 3:06pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)18S E 363765 N 4347162
Decimal Degrees39.26310000, -76.57911667
Degrees and Decimal MinutesN 39° 15.786', W 76° 34.747'
Degrees, Minutes and Seconds39° 15' 47.16" N, 76° 34' 44.82" W
Driving DirectionsGoogle Maps
Area Code(s)410, 301
Closest Postal AddressAt or near 6401 I-95, Baltimore MD 21230, US
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