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Butane cannon build

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Butane cannon build

Unread postAuthor: ToyFactory87 » Sat Jul 28, 2018 10:35 am

I made here a small cannon that is intended to use butane gas. My first trial ended up in failure. I am going to build a more reliable igniter that also seals the chamber. I am wondering though if my chamber is too small for gas?
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Re: Butane cannon build

Unread postAuthor: jrrdw » Sun Jul 29, 2018 8:33 am

Your air / fuel mix is probably wrong. There is page after page of great discussion here on those topics.

Welcome to Spudfiles. :D
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Re: Butane cannon build

Unread postAuthor: jackssmirkingrevenge » Sun Jul 29, 2018 9:41 am

How big is your chamber and how are you metering your gas?

For small volumes, a syringe is the best idea:

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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Butane cannon build

Unread postAuthor: ToyFactory87 » Sun Jul 29, 2018 5:19 pm

Using a typical fill valve for butane lighter. I need to install an o ring in rear seal, and working in igniter module 3.5v dc to 40kv ac
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Re: Butane cannon build

Unread postAuthor: ToyFactory87 » Sun Jul 29, 2018 5:24 pm

Just hitting the valve with the can. Wasnt metering. I havr to install an o ring to seal rear seal and im making ignitor plug that seals, and ignition power module 3.5v dc to 40kv ac
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Re: Butane cannon build

Unread postAuthor: jackssmirkingrevenge » Mon Jul 30, 2018 7:51 am

In that case it's almost guaranteed that you have far too much fuel in your chamber. I really recommend the syringe method for accurate filling.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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