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marble spud gun cheytac m200 style

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Re: marble spud gun cheytac m200 style

Unread postAuthor: jackssmirkingrevenge » 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?
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Re: marble spud gun cheytac m200 style

Unread postAuthor: mark.f » 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?
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Re: marble spud gun cheytac m200 style

Unread postAuthor: satriyo » 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.
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Last edited by jrrdw on Mon Nov 04, 2013 5:06 am, edited 1 time in total.
Reason: Double posting.

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Re: marble spud gun cheytac m200 style

Unread postAuthor: mark.f » 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.
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Re: marble spud gun cheytac m200 style

Unread postAuthor: satriyo » Mon Nov 04, 2013 6:31 am

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