Why is it that a small cannon is not considered safe unless the barrel wall thickness at the breech is at least the thickness of the bore?
Yet a large bore shoulder fired(or puntgun)often have a barrel thickness at the breech only 1/4 the bore diameter or less and they are considered safe? Example= a 1 inch bore cannon should have an outside beech diameter of at least 3 inches,but a 4 gauge (1.034 inch)smooth bore often has an outside breech diameter of 1 1/2 inches or less. :hmm:
Yet a large bore shoulder fired(or puntgun)often have a barrel thickness at the breech only 1/4 the bore diameter or less and they are considered safe? Example= a 1 inch bore cannon should have an outside beech diameter of at least 3 inches,but a 4 gauge (1.034 inch)smooth bore often has an outside breech diameter of 1 1/2 inches or less. :hmm: