This is my new design for what I believe to be the first minecraft cannon capable of shooting a full 360 degrees around itself. It is able to accurately hit any target in sight if it is loaded correctly.
It features a slightly modified version of Etherimp's variable timer system, which allows this particular cannon to switch the payload's explosion delay to 12, 14, 16, 18, 20, 22, 24, or 26 quickly and easily by simply switching 3 levers on&off in different combinations. This allows it to remain an effective cannon when switching between short, medium, and far shots.
This particular cannon holds 1 ring of payload TNT (24) and 3 rings of booster TNT (3 * 8 = 24). The only real limit to the number of payload rings and booster rings you can have with this design is the sky limit.
Additional credit for this cannon belongs to:
AEtherimp (NonProphet): for his awesome variable timer system. http://www.youtube.com/user/AEtherimp
xFullMetal: for being an awesome assistant during the designing / testing of this cannon, and for helping me rebuild it countless time.
A Neo Irony: for helping AEtherimp figure out the redstone wiring for the variable timer.
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