We used time fuses on our projectiles that did the same. The FDC (Fire Direction Center) would calculate the distance and time needed for an airburst and we would set that on our fuses. For our smaller howitzers we had what was called a beehive round which was similar to the coffee sized canister you referenced and was used just like a big shotgun when shot. Used for enemies that got to close for the normal rounds used by artillery.Well, happy birthday then. I remember you are an old artillery guy. That 12-pound Napoleon crew was well drilled. The gun is a smooth bore and could fire solid shot (cannon balls) round shells that exploded in the air and rained shrapnel, and when the enemy got within 450 yards, cannister - a coffee can sized projectile filed with large lead balls. Effective range: About a mile.
One last thing I learned from the guy who described the little demonstration.
It was a British officer who invented the exploding shell that could rain pieces of metal down on enemy troops back during the Napoleonic Wars. His name: Henry Shrapnel.
Later we used rocket assisted rounds that would release grenades or metal flechetts
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