Hi,
I was having a discussion with a friend about the pinging noise that is heard when firing some cannons and mortars. What causes this? Does it impart any information about the safety or other functioning characteristics of the cannon, powder charges, projectile weights, etc?
Thanks,
Matt
"My first mortar (old size beer-can caliber) has 1/2 thick walls and rings with a high pitch 'ping' when shot."