Things You'll Need:
- Three-foot PVC pipe
- PVC y-junction piece
- PVC tape
- PVC cement agent
- PVC screw cap
- Igniting mechanism from a BBQ lighter
- Drill
- PVC Plug piece
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Step 1
Connect the three-foot-long PVC pipe with the y-junction. Use PVC tape to put them together, then use PVC cement to secure the connection.
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Step 2
Attach the PVC screw cap on the base end of the y-junction. This will be used as the cover for fueling the cannon with propane gas.
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Step 3
Take the igniting mechanism from a barbecue lighter. It is a covered wiring with an exposed metal tip attached to the pressure switch. This is the only component of the barbecue lighter you really need.
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Step 4
Drill a hole at the center of the PVC Plug piece. The hole should be large enough to accommodate the wiring of the igniting mechanism but small enough to leave the switch out.
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Step 5
Insert the igniting piece through the hole, then carefully cement the component in place. Make sure sparking tips remain dry and unblemished at all times. Add PVC tape to seal any air holes, then let the component dry.
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Step 6
Connect the PVC Plug with the igniting mechanism onto the remaining open y-junction slot. Secure the attachment with PVC cement and tape. Wait for all the pieces to dry off.
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Step 7
Test out the cannon by using a potato as ammo. Shove it into the barrel as far as possible so that it rests between the connective point of the pipe and y-junction. Open the PVC screw port and Plug, then apply a small amount of propane gas inside. Seal it, take aim, and fire the igniting mechanism. If the potato launches, you have successfully made a cannon.
