Here is how to build a fun and inexpensive combustion powerded paper wadd shooter or spit ball cannon. This will take about 1 hour to build from start to complete.
Step 1: Parts and Tools
You will need the pictured lighter (refillable multipurpose lighter, pen (Bic round stick) and pump(Pocket Pump from Wal-Mart or Academy). You will also need the following tools or equivelant means. Drill, 1/16 drill bit, 5/16 drill bit, plastic epoxy, tooth picks, razor, small phillips screw driver, quick steel(Hardware or Automotive), tape and hot glue if desired.
Step 2: Dissasemble Lighter
Take the little guy apart except for the end you use to refill under normal opperations.
Step 3: Tank Assembly and Preparation 1 of 2
Dissasemble the tank part that holds the Butane. You might want to go outside to release the Butane pressure. Then take a 5/16 drill bit and drill the following holes. See Picture
Step 4: Tank Assembly and Preparation 2 of 2
Drill 1/16 hole in tank just behind exhaust hole. Note: Do not drill straight through. Drill from each side to prevent plast drill bit debree from remaining in tank. Then rethread small cap and use the original gas adjuster as a wrench to tighten. Use Epoxy to set sparker to tank. Note: DO NOT EPOXY THE PART OF THE SPARKER THAT HAS MOVEABLE PARTS. USE A FLAT SIDE.
Step 5: Barrell Assembly and Preparation
Dissasemble pen and cut white tube in half. This is now your barrell.
Step 6: Insert Sparker Wire Into Tank
Cut and insert wires into tank. You do not need to strip back wire. Just put enough wire into the 1/16 hole then epoxy to seal and hold wire in place. DO not get epoxy on any of the sparker moveable parts.
Step 7: Attaching Barrell to Tank
The pen will slide over exhaust cap and hold firmly for you to use quick steel to set permanently.
Step 8: Pocket Pump Preparation
You will need to cover the side hole of the pump stem. If you leave a little rubber overhanbing the stem, it will act as a seal sleeve when you prime the tank with oxygen. The rubber sleeve comes from the rubber tubbing that was remaining with the dissasembled lighter.
Step 9: Filling Tank With 91% Isopropyl Alcohol
Pour a small amount of 91% isopropyl alcohol down barrel to fill tank. This might be 1/8 teaspoon.
Step 10: Lock and Load
1. Use Pocket Pump to inject a small amount of air.
2. Take 1 inch by 1 inch of paper towell and wadd it up tightly.
3. Push wadd about 1/2 way down barrell.
4. Aim and press sparker.
5. May need to add air if it doesn't fire.