how to get constant air flow for bb guns

darkpyro · Sun Jan 08, 2006 6:45 pm

i am wanting to make a bb gun but do not know how to get the constant air flow and a do not want to be hooked up to a compressor the whole time im shooting please help me.

beebs111 · Sun Jan 08, 2006 6:56 pm

u could use regulated co2 or a really big chamber pressurized up high thru a small nozzle

saladtossser · Sun Jan 08, 2006 7:03 pm

u would need 8 gal worth of 80psi air.
a 20oz co2 pb tank won't do the trick, a big chamber is a good idea.

darkpyro · Mon Jan 09, 2006 5:22 am

how big are we talkin like 50cm long 80mm pvc pipe

beebs111 · Mon Jan 09, 2006 6:52 am

i wans thinkin one of those half scuba sized co2 tanks, and for the chamber about 6 foot of 6"pvc

boilingleadbath · Mon Jan 09, 2006 7:13 am

Darkpyro:
There is a airsupply-on-board BBMG on this site; mr.Plow's "Vortex project". He has a chamber some 25% smaller than your 50x8cm chamber would be.

He says he gets roughly 100 shots per charge, which at typical rates of fire corresponds to roughly 1.5 seconds of firing.

darkpyro · Mon Jan 09, 2006 3:42 pm

okay ill have a look so if i only held the trigger for 3 miliseconds it would only shoot about 15 bbs right

boilingleadbath · Mon Jan 09, 2006 4:53 pm

No, if you held it for 3 milliseconds it'd fire 1/5 a bb - but that's not a valid excecize because:
A: you can't press the trigger for 3 milliseconds.
B: the chamber takes longer than that to pressurize

15bbs would be about 1/4 second.

darkpyro · Mon Jan 09, 2006 5:47 pm

alright then thanks for the help