Duffle bag gun

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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Los Frijoles
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Sat Apr 28, 2007 9:47 am

I made this gun a while ago, but I never posted it here. It is a pneumatic launcher with an oversized chamber (18"x3") with electric ignition. I used a jartop sprinkler valve from home depot (two hours of searching...) and it has worked fine for the past 9 months. The camo is duct tape wrapped around everything. The barrel is 36"x1" but I am planning on making a bigger one (36"x2").

Why is it called a duffle bag gun? Because the chamber & valve can fit inside a duffle bag (and maybe an 18"x4" barrel if I ever make one).

Image
Whole gun

Image
Close up of valve
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spudthug
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Sat Apr 28, 2007 9:51 am

dude electric igniton sucks balls...modify it...
4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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hi
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Sat Apr 28, 2007 10:51 am

so what if its electric, its still cool. where did you get the cammo tape? you should make a 12'' barrel that way you can launch duffle bags :wink:
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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singularity
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Sat Apr 28, 2007 3:40 pm

any way you can get camo tape at wall mart, but only during hunting season. where i am apparently its not hunting season
be sure to check out my <a href="http://www.spudfiles.com/forums/ak-styl ... 9.html">AK Styled Vortex Gun</a> and my <a href="http://www.spudfiles.com/forums/at-4-t9627.html">AT-4 Rocket</a>

upcoming projects... finalized clip fed BBMG and ball point pen sniper
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mega_swordman
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Sat Apr 28, 2007 5:06 pm

The gun looks cool, but I would recommend getting a project box from radio shack for the electrical.
"Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity." George S. Patton
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zeigs spud
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Sat Apr 28, 2007 10:44 pm

the wires at the bottom make it look like a bomb >.< but i like the camo tape u put on it.
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mark.f
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Sun Apr 29, 2007 8:36 am

spudthug wrote: dude electric igniton sucks balls...modify it...
Spudthug... all your posts I've read this morning have done nothing but criticize a first poster's cannon. Not the good kind of criticizing, but the bad kind, like above. If you think he should modify the sprinkler valve, say so, but not with all the sarcasm.

Beans... good to see you here!
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Specialist
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Sun Apr 29, 2007 9:02 am

electric isnt so great and you should get a project box for sure. but if it works and your happy woth i dont care. welcome to spudfiles!
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iPaintball
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Sun Apr 29, 2007 9:03 am

Nice gun! I love the camo too!
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Billy Bob
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Sun Apr 29, 2007 12:58 pm

Yes pneumatik ignition is more useful but if somebody haven´t another valve or cant modifide ... its ok.

I ve never seen a cammo tape :shock:

Nice gun
Juicey
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Sun Apr 29, 2007 8:20 pm

Good looking cannon. Like Seigs said though, I wouldn't try passin that through any airport security lol.
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Spyider
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Sun Apr 29, 2007 11:45 pm

when i saw duffle bag gun i thought it was designed to fire inside one. that wold be cool to have something like that.

if you had a shorter barrel on it you could stick it in one with a hole in the end of the bag for the barrel to stick out, lol.
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hi
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Mon Apr 30, 2007 12:18 am

Spyider wrote:when i saw duffle bag gun i thought it was designed to fire inside one. that wold be cool to have something like that.

if you had a shorter barrel on it you could stick it in one with a hole in the end of the bag for the barrel to stick out, lol.
ive considered making a breifcase gun, that would be cool.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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