Question about setup for Combustion cannon

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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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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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)
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
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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.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Thu Dec 12, 2013 5:22 pm

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