Nuke Cannon is not constructed in the usual fashion lurkers reading this thread.
As stated by Poppycocks, you must use oil in place of water. You also need to encase the entire structure in iridium tungsten steel reinforced blocks. Frames are likely required with a highly intricate assembler setup which deploys the nuke while at the same time triggering an epic noteblock sequence that must last at least 80 seconds during which the nuke is primed. Before pressing the button you must also sacrifice at least 1000 cows, and throw the hides into a RedPower volcano. You are then required to remove any armor and stand on top of the cannon as it fires, hopefully that epic music is still playing.
Please note: This is called going out in a blaze of glory and may not be suitable for all ages or levels of rage at losing everything in your inventory and within a few hundred blocks. Use of forcefields may result in survival.
As stated by Poppycocks, you must use oil in place of water. You also need to encase the entire structure in iridium tungsten steel reinforced blocks. Frames are likely required with a highly intricate assembler setup which deploys the nuke while at the same time triggering an epic noteblock sequence that must last at least 80 seconds during which the nuke is primed. Before pressing the button you must also sacrifice at least 1000 cows, and throw the hides into a RedPower volcano. You are then required to remove any armor and stand on top of the cannon as it fires, hopefully that epic music is still playing.
Please note: This is called going out in a blaze of glory and may not be suitable for all ages or levels of rage at losing everything in your inventory and within a few hundred blocks. Use of forcefields may result in survival.