need help

[midget08]

im going to make a combustion spud gun this weekened!!
i dont know what sizes to use...it will be my first one expect for a mini combustino one..

i was thinking about barrel 2 1/2 then the chamber probley 4 i dont know what size to make the chamber or the barrel if them are good or not>>
need some peopel oppions..
also to inginat it...thinking lighter switch not big enough..but i was thinking or a bbq grill swith....are them the best one to use???


if you could help me out with this it would be good!!

Thanks a lot!

[spudzinger]

Hey, it really depend on what type of power you want and what you want to shoot. You could use a 2 or 4 inch combustion chamber and a barrel that can shoot golf balls or ping pong balls.Hope that helps a little.

[midget08]

i want something that can shot far but isnt real big ...would like to shot golf balls and D battiers and at least potatoes...

Thanks

[dragon finder]

well a good one to start out with is a 3 in chamber a and a 1.5 or 2 in barrel mi first was a 3 in chamber ans a 1.5 in barrel hope this helps

[cardinals08]

I might go a little smaller on the barrel. and maybe if you feel up to it make interchangable barrels so you arent limited to just one size of ammo. I have also heard that 2.5 is expensive, but i havent tried using it or seen it to know for sure. good luck though, I hope it turns out nice for you

[midget08]

thanks for alll the help.... i MIGHT maybe use 3 in. chamber and 2 in barrel!

[saladtossser]

buy a 5' stick of 4" dia pipe, cut it to a foot long, attach cleanout on one end, 4" coupling, 4" to 1.5" bushing, two 1.5" street elbows, 1.5" to 1.25" bushing, then finally a 5' stick of 1.25" dia barrel (for d sized batteries). add ignition (normal BBQ ignitor or better) and other assesories (fan, fuel meter...) as needed.

that gives you a c:b ratio close to 1.7:1 which makes it very wasteful and loud.

do that, and tell us about it

[midget08]

well im lost
haha
i think to start out im jsut going to build a 3 in chamber and a 2 in barrel with BBQ inginator!
Thanks for all the help!

[spudzinger]

midget08 shooting batteries is hell for the environment. Its like a small toxic waste bomb. So don't do it.

[MisterSteve124]

You kicked up a dead topic for that? This was posted 9 months ago and who cares?