Encyclopedia · Manufacture, materials, and testing

Banding and hooping cannon

Banding, or hooping, reinforced a gun by shrinking one or more wrought-iron bands over the breech, where the pressure was greatest. It let cast-iron guns withstand the strains of rifled charges.

Also known as: reinforcing band.

MethodWrought-iron bands shrunk hot over the breech
PurposeStrengthen the gun where pressure is highest
UsersParrott and Brooke rifles, and converted smoothbores

Strength at the breech

Banding, or hooping, strengthened a gun by shrinking bands of wrought iron over the breech. Heated so they expanded, the bands were slipped on and allowed to cool and contract, gripping the gun tightly and putting the breech under compression so it could better resist the pressure of firing.

The method let cheap cast-iron guns take the higher pressures of rifled charges, and it defined the appearance of the Federal Parrott and the Confederate Brooke rifles, as well as many smoothbores converted to rifles during the war.

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