Here are some good tips for a spud gun: - Schedule 80 PVC where possible - Use anti-static spray instead of hair spray, it's cheaper and doesn't leave a tacky c

Here are some good tips for a spud gun: - Schedule 80 PVC where possible - Use anti-static spray instead of hair spray, it's cheaper and doesn't leave a tacky combustion chamber - Put a small PC fan into the combustion chamber to mix the fuel and air, this will ensure you get a fuller combustion. If you're an adult, you can make one out of metal pipe and use an oxy acetylene torch to fuel it. Perfect stoichometric ratio, very very energetic!