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Posted: Wed May 03, 2006 4:53 am
by Holland_Charley
Made a new barrel today 12 mm diameter still dont know if im goign 2 use it for this one or for another one. Im scared the presure will be 2 big for an 12mm diameter barrel look for my combustion chamber volume on the top of the topic.
greets
Posted: Wed May 03, 2006 5:08 am
by Benny
the pressure definatly wont be too much, combustions only make 20-50 psi.
Posted: Wed May 03, 2006 10:58 am
by Holland_Charley
Thanks man 8) i always thougt iw would blow
with a tine barrel
Posted: Fri May 05, 2006 2:48 pm
by Holland_Charley
Yo should i use pure butane or butane from hairpray?
greet Charley
Posted: Fri May 05, 2006 4:56 pm
by Shrimphead
Don't use hairspray. It gums your chamber up. Smaller diameter pipe can usually hold more pressure.
Posted: Fri May 05, 2006 11:37 pm
by Brian the brain
I've put 22 bar on a 12 mm copper pipe.Not that you should but the smaller the diameter the stronger it is.Less surface area for the air to push on.No combustion chamber is gonna blow that barrel up.
Since you use all metal you could try starter fluid.(starter spray bij de halfords)
Posted: Fri May 05, 2006 11:46 pm
by SpudStuff
that wont be a very powerful combustion because the C:B ratio is way off
Posted: Mon May 08, 2006 10:33 am
by Holland_Charley
the C:B ratio is much much biger than an normal spud gun so with some pure oxygen in combination with:
butane
Ether
it is kinda powerfull, with hairspray the projectiles often comes 20- 40 meter away with a ugly parabole. But im working on better fuels so stay tuned.
-greetz Charley