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What Would You Suggest?????

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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What Would You Suggest?????

Unread postAuthor: m3rc3n@ry » Mon Aug 07, 2006 12:57 pm

Hi i am kinda new to this so here goes nufin.........
i am going to make my first spud cannon and was wondering what you think are the best sizes for the barrel and combustion chamber???(i dont want the cannon to be massive but i want it to be powerfull)
also i have read that ppl are using computer fans in there cannons. what are they using them for????? to mix the fuel and air or to get freash air into the combustion chamber...............is it somnething along those lines? i have acouple of spark plugs around the house, do u think they could be used as an igniter in any way??


thanks for your time and any advise and/or criticism will be very helpfull
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Unread postAuthor: Dom » Mon Aug 07, 2006 1:06 pm

http://members.aol.com/sph911/spud/combustion.html

That's the basic measurements for a Basic Spud gun. If size is a matter, do like me! My future spud gun ill have a unscrewable barrel, so it's easier to transport :)

For the spark plugs..

http://www.spudfiles.com/forums/viewtop ... 8929#28929
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Unread postAuthor: m3rc3n@ry » Mon Aug 07, 2006 2:07 pm

the link you posted was very helpfull dom, but is 100 yards far 4 a cannon of that type? i think im going to head down 2 the hardware store 2 moz :D and have my self some fun........
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Unread postAuthor: Dom » Mon Aug 07, 2006 2:13 pm

Yeah me too... 100 yards is pretty nice. :)
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Unread postAuthor: djt » Mon Aug 07, 2006 4:06 pm

the fans in the chambers are used for both of the things you mentioned. to vent the chamber after each shot and to mix the fuel and air for better results.
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Unread postAuthor: spud man » Mon Aug 07, 2006 7:55 pm

Dont bother putting a spark plug in your cannon just wire up multiple sparks with a bbq sparker it works better and then you dont have to put a big hole in your chamber.
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