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Flipping the script: take a cue from Spigot/Rifle grenade?

A place to ask general spud cannon related questions.
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Unread postAuthor: jackssmirkingrevenge » Wed Dec 17, 2008 1:01 am

While during wartime it was a good idea as it saved making expensive rifled barrels, in terms of performance it's not that good a concept.

Ultimately, your projectile has a larger diameter than the surface area of the base where the gasses can push. For the best performance, the inverse of the idea is ideal, basically a saboted round, where you have maximum area inside the barrel (more pushing power available) and minimum area once the projectile leaves (reducing drag).

The only reason I could see for using this sysyem is if you want to launch an outsized load, something like the "Flying Dustbin" spigot mortar used by the British on D-Day.
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