A cannon made out of PVC Pipe which shoots over 375 feet (115 metres).
This is a very simple project to make. All the components came from my local hardware store. I already had an air compressor at home, but if you don't have one, then you could use a hand bicycle pump.
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Step 1: Materials
What you need:
1 x Length of Pressure PVC Pipe (I used a 1 metre x 40mm piece)
The 'pressure' bit just means that it's thicker. you can use the thinner stuff if you want, but it might break
2 x Pressure Caps
Glue (plumbers glue or other strong glue)
Air Compressor or Bicycle Pump
Step 2: Method
Step 1: Drill a hole in one cap appropriate for your air compressor/pump nozzle, then glue it on the pipe
Step 2: Jam the other cap on the other end as hard as you can!
Step 3: Destruction!
After the glue has dried, stick the nozzle in the hole you drilled, then aim your cannon, turn on the air, and take cover!
Just make sure not to fire the cap at something hard or metal because i made that mistake, and as you can see, it does not have good results!