How To Make a Canon Minecraft TNT (1/9 steps)
Step 1: General Layout
These two photos show the general arrangement of the TNT cannon with a view plunging on it. If you are accustomed with Minecraft and understand all this, you can just go ahead to create from here, based on these photos. For materials, you will need the following:
-33 solid blocks, best are obsidian, stone or rocky substrate if you are in design mode.
-dust of redstone 12
-8 TNT (for each individual explosion)
Make sure you have all these materials before you start.