As the outer layers cooled, they compressed the inner layers, giving the cannon greater tensile strength.
Archaeologists yesterday put on show a 17th century cannon recovered from a wreck dubbed Scotland's Mary Rose.
Once they were in close, they could deliver devastating fire from their cannon and rocket armament; only a few hits could bring down a heavy bomber.
However, the Irish needed the castle's large cannon for use in reducing other strongholds in the region, and were anxious to do so with the minimum delay.
It looked like a central metal shaft with two spherical boosters on the side, and a main cannon in the front of the central shaft.
But in the visual chaos, one can discern leaning buildings, a crowd of people, and in the lower right, a wheeled, blasting cannon .
The cannon crews defended their guns with everything they had, turning from guns to knives and even their bare knuckles.
the gunships blasted arms depots with 105 mm cannon fire and rockets
In 1968 Gen. Franks returned to Fort Sill, where he commanded a cannon battery in the Artillery Training Center.
In her article on the last days of Byzantium, Judith Herrin emphasises just how noisy they were, with drums and trumpets and church bells sounding over the roar of cannon and the clash of steel.