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Pneumatic Pen-gun Project

Discuss miniature cannons built from things such as pill bottles and pen caps.
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Pneumatic Pen-gun Project

Unread postAuthor: Proxywars » Sat Jan 14, 2012 4:54 pm

I wanted to make a pengun for a long time now and my first project didn't work well. My air compressor goes up to 150psi. The space between my barrel and body was 1/16". Air leaked constantly out the barrel. I need a gun that will 100% work. I understand the concepts. If someone can spoon feed me exactly what I need and how to do it. I will be very much appreciated. The gun im thinking about is something such.
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Unread postAuthor: MrCrowley » Sat Jan 14, 2012 6:17 pm

Only 150PSI? Forget about it. Buy a shock pump that can do at least 300PSI or build a bigger gun. Something this small at such a low pressure is not very fun.
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Unread postAuthor: Proxywars » Sat Jan 14, 2012 6:26 pm

Mmk ill get a 400PSI shock pump today. Hopefully find a mouse pad. Any sugestions with pipe sizes? I also dont know how much space between the barrel and valve with the mouse pad piston between.
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Unread postAuthor: Gun Freak » Sat Jan 14, 2012 6:44 pm

Use a rubber stopper piston, it's like 50 cents and one piece.
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Unread postAuthor: Proxywars » Sat Jan 14, 2012 6:48 pm

Theres no science stores by my house. I'm a complete noob where can I buy it in stores?
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Unread postAuthor: Gun Freak » Sat Jan 14, 2012 6:53 pm

Hardware stores. I saw them in ace today.
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Unread postAuthor: Proxywars » Sat Jan 14, 2012 7:26 pm

Wat isle lol in 9th grade and idk how to spell it
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Unread postAuthor: Gun Freak » Sat Jan 14, 2012 8:11 pm

The isle with the nuts and bolts.
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Unread postAuthor: Proxywars » Sun Jan 15, 2012 1:06 am

I'll do that wat pipes should i get?
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Unread postAuthor: Gun Freak » Sun Jan 15, 2012 10:09 am

1/8" barrel is good and ~8mm ID chamber is fine.
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Unread postAuthor: Proxywars » Sun Jan 15, 2012 1:22 pm

Okay cool I'll look for a plumbing store
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Unread postAuthor: Gun Freak » Sun Jan 15, 2012 2:32 pm

You can probably find the pipe at the same store as the rubber stopper.
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Unread postAuthor: Proxywars » Sun Jan 15, 2012 2:42 pm

Lowes has pipes to a min of 1/4" =/
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Unread postAuthor: Gun Freak » Sun Jan 15, 2012 3:10 pm

I was talking about the hardware store. They normally carry (in the USA)K & S Engineering tubing, which is what a lot of people here use. I use it, it's really good stuff.
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Unread postAuthor: Proxywars » Sun Jan 15, 2012 3:12 pm

IK they only carry brass pipes at a min of 1/4" and alot of small fittings and pvc =/
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