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Question about setup for Combustion cannon

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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Question about setup for Combustion cannon

Unread postAuthor: vng21092 » Wed Dec 11, 2013 1:29 pm

Is a coaxial setup more/less/equally as efficient as a setup where the barrel is at the end of the chamber? Also, I understand that a silencer doesn't do much for air rifles because of how they operate, but in the case of a combustion cannon, would silencers actually work? How much noise would be reduce because I live in a relatively quiet neighborhood and I don't want any problems...
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vng21092
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Re: Question about setup for Combustion cannon

Unread postAuthor: kydavies » Thu Dec 12, 2013 12:02 am

its just gas going down a tube so its the same principal... if you want a quieter launcher go with a longer barrel. if your really concerned about noise, you shouldnt be. you can be as loud as you want in the woods 8)
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mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
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Re: Question about setup for Combustion cannon

Unread postAuthor: jackssmirkingrevenge » Thu Dec 12, 2013 5:52 am

If noise is an issue, you want a relatively small chamber. With this had taken it down to 0.4:1 C:B ratio and it still sounded like a bloody shotgun going off :D

A large volume suppressor packed with heat absorbing material like steel wool (not too fine or it will burn!) can make a significant difference if done well.
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Re: Question about setup for Combustion cannon

Unread postAuthor: mark.f » Thu Dec 12, 2013 5:22 pm

Just don't buy it with little flowers. :lol:
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