Please don't fire over 64 redstone time...because of the lag,it will glitch out if you fire too long time.
To use the cannon, put the redstone on the top of the hopper. then wait for around 4 second,and put the redstone on below hopper.
(the ammo hopper should having less redstone then upper hopper or it will very easy to fail shooting the last shot)
Fire rate : 480 TNT per seond (48 TNT / tick)
Please don't fire over 64 redstone time...because of the lag,it will glitch out if you fire too long time.
To use the cannon, put the redstone on the top of the hopper. then wait for around 4 second,and put the redstone on below hopper.
(the ammo hopper should having less redstone then upper hopper or it will very easy to fail shooting the last shot)
World download : http://isstars.com/sub36.zip