Mini Potato/Marble Cannon Project

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.
Krislachlan
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Thu Dec 18, 2008 9:03 am

made a mini Patato Cannon/Marble Cannon.. PLease tell us what you think. this stuff is fairly New to us and how we can improver


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Edited by MrC
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cheeseboy
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Thu Dec 18, 2008 11:44 am

nice for a first, I hope you properly joined the pipe though i can't see from this picture
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SP00K
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Thu Dec 18, 2008 5:37 pm

Pretty cool 8) They look pretty good too.
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psycix
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Fri Dec 19, 2008 7:40 am

Nice.
Though you could check out the "C:B" ratio the next time you build a gun.
For more information, click Wiki at the top of this page.

How are the barrels connected to the chamber?
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Radiation
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Fri Dec 19, 2008 2:06 pm

Question is, what do you want to improve?
I void warranties.

The Gauntlet of Clara Ann
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psycix
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Sun Dec 21, 2008 6:36 am

Probably performance, ofcourse.
Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

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Krislachlan
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Sun Dec 21, 2008 5:49 pm

Hey so the Barrels are screwed into the chamber.

And were hoping to improve mainly fire rate.. Its really un reliable
We bought a good sparker for 15$ but it still seams to only shoot when it wants too.
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starman
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Sun Dec 21, 2008 6:05 pm

Krislachlan wrote:Hey so the Barrels are screwed into the chamber.
And were hoping to improve mainly fire rate.. Its really un reliable
We bought a good sparker for 15$ but it still seams to only shoot when it wants too.
Fire rate? On a basic spray and pray? Sounds like you're looking for consistant shots.

You're probably using too much fuel, a problem much harder to overcome with a smallish chamber like yours. Mutliple spark gaps and a fan can help with consistancy...assuming you get your fueling down pat.

You can come close to tripling your ammo performance with a (lot) longer barrel...4-5' or so.
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psycix
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Mon Dec 22, 2008 9:06 am

Chamber fan and propane metering would do well on firing rate, performance and reliability/consistency.
Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

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