I thought I read here to use ABS pipe instead of pvc pipe. I'm sure someone else could help more.

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I hate to be the one to tell you, but it was discovered the day man discovered how to fire a projectile from a barrel.

I doubt that the day a projectile was first shot that man used a paper cup as wadding. You can't ...

I never heard of a sabot. It does not blow a hole in the cup.

I put a tapered cup into my 2" barrel. I cut the cup flush with the top of the barrel. Now I can shoot any object up to 2" in diameter. I've shot walnuts at great heights. The cup fits very snug and lasts a long time. Although it's paper, it's not destroyed. Try this technique. I think it's a major ...

I noticed flames shooting out my barrel at night. I made a longer barrell so the projectile would be pushed longer for more distance. It's not scientific, but it seems to be common sense from my observation.

I completely agree with you.

My gun shot about 50 feet into the air with a small "puff!" sound. It was stored in a hot garage with the hairspray. Could you tell me what might be wrong? Thank you.

I live in the city and I can only test fire my spudgun by shooting straight up and hoping it lands in or near my yard. I need a lot better location. Where do you shoot yours?

I was wondering if a gun can be used so much that the integrity of the pvc might be in jeopardy. Could it become fragile? If it's not used too much should a gun be abandoned after a period or years due to aging of pvc? Thank you for your comments.

I'm new to this forum and to the potato gun also. I've made 2 already and I like what I have. Mine are conventional. Tell me about your more sophisticated versions and information regarding possible speed and distance. Thank you. I have no desire now to make a super performer, but I'd like to know ...

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To be kind, I went and plugged some data into EVBEC:

You have a ~300 cubic inch chamber, and a ~230 cubic inch barrel, for a 1.33:1 C:B ratio.

If you where using metered propane and a chamber fan, you would be ...

I don't have any pictures yet. I don't think I'll be using the gun too much because of the saftey issue: "Where is it going to land"?

Forgive me, I'm fairly new. What's a spark strip?

My new gun has a cylinder (pvc of course) 2 feet long and 4 inches in diameter for the combustion chamber. I have a 2 inch diameter barrell that is six feet long. Total length probably 8.5 feet.

Remember wiffle balls with holes made of light weight plastic? If you put a spin on them when you threw ...

I've had a problem locating a lantern sparker. Does anyone know of a good source or a nationwide store? I've thought of running a battery through a step up transformer to see if I can produce a spark. I think the utlimate would be to mount a spark plug in your tube and fire that somehow. I thank all ...