Hello every one! I have been offline for a while, and hadn't been able to make instructables since. But I'm back now, and will show you how to make the infamous minecraft tnt cannon! you don't really need too many recources to make this, but thanks to the 0.8.0 update, I can demonstrate in creative. Now, let's get started!
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Step 1: Materials
obsidian, flint and steel, tnt blocks, a slab, and a bucket of water.
Step 2: Sturdyness
dig a 1x3 hole in the ground and fill it with obsidian blocks. That way, when you use the cannon, it won't blow itself up!
Step 3: Framing
surround the blocks with more obsidian and leave one corner uncovered. This will keep things inside the cannon and will prevent surrounding blocks from exploding.
Step 4: Ammunition Holder
Add your slab on the end part of the obsidian. this will hold your ammo and will keep the engine( water) inside.
Step 5: Engine
Add your bucket of water to the other end of the cannon. this will help push the tnt distances.
Step 6: Ammo
place a block of tnt on the slab and on the obsidian block behind it. Now you have loaded your cannon.
Step 7: Shooting
light the bottom tnt with the flint and steel. Wait about 3 seconds. then, light the top tnt. it should shoot into the air.
Step 8: Distances
one shot of the cannon will travel about 13 blocks away. Have fun with your tnt cannon! Prank a friend or family member with this! Thank you for checking out this instructable! Please favorite, comment any questions, and Follow!