a properly mixed combination of fuel and air is going to give you improved performance no matter how it was mixed. the final product is still a properly mixed combination of fuel and air . if i want performance i'll just drag out my advanced combustion that has the fan, external fuel meter and stung...

funny thing, i know i don't want an external pipe or a chamber fan on my launcher. an external meter and a fan control box will both deter from the sleek looks and lower weight i'm shooting for. not to mention the 2" chamber is not all that easy/fun to put a fan in.

i have both 1/8" and 3/16" brakeline to use. i can't imagine much fuel would be left in the pipe.

i know there is at least one cannon here in the showcase that uses a chamba chain.

as in the above post

air and fuel will be mixed before injected into chamber

i'm currently building a combustion tater rifle. my chamber is out of 2" sch40. i'm trying to keep the weight as low as possible, so i don't want to add a fan or a chamba chain. i was wondering if anyone has tried this configuration to disperse/mix propane/mapp gas? air and fuel will be mixed before...

my math might be bad, but wouldn't a single chamber of 3" pvc hold more than two chambers of 2"?
area of 2" circle = 9.8-10.0-ish
area of 3" circle = 22-ish

i'm too lazy to break out a calculator

not to mention less fittings

there are plenty of sites out there that have schematics for stun guns. this is what fires my launcher. http://img260.imageshack.us/img260/549/stungun3qo2.gif i borked it to the point where i had to have someone else fix it. after reading some of your posts you might want to just use a bbq igniter, ...

i'll probably go with the triple shot at 40-ish psi. i've got a small regulator laying around that i can probably use for consistency. i was just trying to keep everything as compact as possible. this will give me a chance to play with other metering options.

thanx again

thanks for the chart. it looks as if i'm sort of screwed using my current meter for the rest of the winter. i only used the 1/4 in. because it was just laying around.

i'll probably just have to go back to static guard for the time being.

nice website. i hope someone can help with my question. this summer i built an advanced combustion launcher. it's been working well up until it started to get colder. now the propane refuses to turn to gas. it stays in a liquid state while in the meter. i'm guessing my meter is too small but i haven...