marble spud gun cheytac m200 style

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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jackssmirkingrevenge
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Sun Nov 03, 2013 5:47 am

More than one shot per fill? Either you have too much fuel, or it,s not mixed properly.

Can you draw a diagram of what your chamber looks like.

Also, how did you calculate the volume? Is you chamber long an thin that has pockets where gas can accumulate?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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mark.f
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Sun Nov 03, 2013 7:54 am

It sounds like you're using too much fuel. From what I can see you should be using ~17.5 mL of butane for that chamber size. Have you installed a chamber fan yet?
satriyo
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Mon Nov 04, 2013 12:48 am

this is my chamber design : http://adf.ly/UfOoI

no i have not. i'm not yet get the fan. i'm still blow air from my mouth. sometimes i use cool pad for my laptop as the fan.
Last edited by jrrdw on Mon Nov 04, 2013 5:06 am, edited 1 time in total.
Reason: Double posting.
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mark.f
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Mon Nov 04, 2013 5:00 am

The fan does more than just air the chamber out, it helps get an even mix inside the chamber before you fire.
satriyo
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Mon Nov 04, 2013 6:31 am

does my chamber is too long? so that's make not total combustion?
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