In movies (which I know are not a good source) I see the anti air shells exploding at random heights in the air. How did the shells know when do detonate or did they have a pre set fuse.
Thank you. Hope it's not a stupid question.
More can always be said on the matter if anyone would like to write up a post of their own, especially for the other combatant nations or for WWI anti-air gunnery. More material is always welcome!
For the meantime, OP, here's some previous material on just this question for your reading: