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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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Rambo
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Thu Jan 26, 2006 6:42 am

If the nossle is wide and there is exact flow of air there is a posibility for it to turn in to a jet engine... :roll: It happend to my first gun(for a few seconds), but notting spacial, if the chamber is from glass and type.My edvise is to use a glass chamber and something around it so if it crack there won't be any shrapnels.
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drac
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Thu Jan 26, 2006 7:45 am

Doesn't alcohol exhibit some polarity on the molecular level, but evaporate at room temperature? And it would be impossible for it to all light at once, the chamber would have to be overpressurized.
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Rambo
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Thu Jan 26, 2006 9:19 am

Offcourse it won't ignite at onse.This isn't NG.
20ml for more then 40 shots.I just open the valve and pull the triger.The gun start shooting.
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Urban Ninja
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Thu Jan 26, 2006 10:55 pm

Can you upload a video of it? That would maybe help explain things.
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Rambo
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Fri Jan 27, 2006 8:10 am

Why don't someone try to build one.It's not that hard.It wouldn't take more then an hour.May be first with 50ml, only the chamber..It's not going to blwol your hed of. :roll:
cardinals08
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Fri Jan 27, 2006 9:05 am

all it is is a bottle, a straw, one way flow valve with air hooked up for airing out the chamber, and something to load ammo. you pour alcohol in, the fumes are there, you click the sparker boom, air comes in, airs it out, more fumes, and boom, etc.
at least I think thats how it works
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Urban Ninja
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Fri Jan 27, 2006 9:12 am

Yeah, I would build one but the problem for me is the sparker and the oxygen tank?! :x .
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Rambo
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Fri Jan 27, 2006 10:34 am

A one way valve is un nesesery.I used a sparker from a lighter on my previus gun.After using it I had a pain on my finger.For the air I use pepsi cola bottles.
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Rambo
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Fri Jan 27, 2006 12:15 pm

My tuninged uzi with air supply.
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Cronic
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Fri Jan 27, 2006 4:37 pm

Ok an you know that your'e DAMN RIGHT talented for minis... Anyway only wanted to say that this thing rocks...
<img src="http://i4.photobucket.com/albums/y107/LabMinky/labb.jpg" alt="Image hosted by Photobucket.com">
cardinals08
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Fri Jan 27, 2006 4:53 pm

cant see much from that pic with the pepsi bottles, is it the same gun as the pic on the front just on a larger scale with pepsi bottles?
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Urban Ninja
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Fri Jan 27, 2006 8:35 pm

That is a pretty nice gun! That is a metal chamber right? Whats the rate of fire on this one?
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Rambo
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Sat Jan 28, 2006 2:27 am

It's not very fast shooting.Yesterday I pushed it to about 1 shot for second.It should be a fast shooting sniper.Everythink is on an old uzi. :lol:
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Rambo
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Tue Feb 28, 2006 12:38 pm

This puls jet starts on the principle of the auto comb. http://www.pulse-jets.com/phpbb2/files/ ... 02_148.mov , but it is in lower friqency.
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Shrimphead
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Wed Mar 01, 2006 12:03 am

That's awesome that somebody finally made an auto combustion! I really want to see a video of this! Rambo, you're a genius!
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