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Wont fire...

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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Wont fire...

Unread postAuthor: Pyro_Boy » Sat Oct 07, 2006 5:41 pm

Ok so i build my first cannon combustion tryed it and it worked=]

Shot twice then when i tryed third it wouldnt light the propellant (yes spark is working)

But when i open the cleanout and spark it lights and flames come out the back.

Why wont it light when cap is on.

Thanks pyro :wink:
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Unread postAuthor: Torch » Sat Oct 07, 2006 5:45 pm

1. Too little or to much fuel
2. You need to vent it after each shot, adding a chamber fan will help with this.
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Unread postAuthor: Pyro_Boy » Sat Oct 07, 2006 5:47 pm

Thank you but each shot was at different time so i think it would be option 1 how much spray do you reccomend using axe right now.
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Unread postAuthor: Torch » Sat Oct 07, 2006 5:50 pm

Just depends on your chamber. Expermenting is the best thing to do really.
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Unread postAuthor: Pyro_Boy » Sat Oct 07, 2006 5:54 pm

Thanks you have been helpful
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Unread postAuthor: Torch » Sat Oct 07, 2006 5:58 pm

No problem! Good luck with it. :)
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Unread postAuthor: SquishY » Mon Oct 09, 2006 3:25 am

I was playing around with my new combustion today(first one ive even done anything with in over a year) and I think my chamber is way to big. I used 2" and 3" ABS with all the proper ends and such, the chamber from reducer to screw on cap thingy is 8 1/4" inches(didn's make measurements when it was made just picked a spot and cut) with a 33" barrel. The only good shot I got blew my piezo out and my barrel off but the duct-tape and sand ball went about 500'.
Not hijacking the thread but mine does the not firing thing to so eh.
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Unread postAuthor: Torch » Mon Oct 09, 2006 1:48 pm

Torch wrote:Expermenting is the best thing to do really.

You need to just find the right fuel mixture methinks. But im not really sure..
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