marble spud gun cheytac m200 style

[Shawnturner]

Hi,

i have some problem with my spud gun. if i’m not fill the chamber with much fuel it doesn’t work. and sometimes the igniter spark doesn’t work. can you help me to fix my problem? my chamber make from pvc pipe 1,5 diameter and 17 inch long.
you can visit my blog and i hope you comment for how to fix my problem?
Please help.
Thanks!

I didn’t find the right solution from the Internet.

References: http://www.spudfiles.com/combustion-cannons/topic25466.html

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[Author]

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