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Posted: Wed Feb 20, 2008 7:24 am
by Sticky_Tape
what about hybrids don't you need a high voltage for that?

Posted: Wed Feb 20, 2008 7:32 am
by jackssmirkingrevenge
There are people here that have successfully used a piezo ignitor with hybrids like Novacastrian, noname and in the case of this grenaded launcher, chaos.

Posted: Thu Feb 21, 2008 7:11 pm
by Sticky_Tape
I think I'm going to turn this into a piston gun with the burstdisk in front of the piston valve would it help preformance?

Posted: Thu Feb 21, 2008 7:52 pm
by STHORNE
i think it would (from what i learned on spudfiles) but i have never used burst disks so dont base your decision on my word

Posted: Thu Feb 21, 2008 9:53 pm
by SpudFarm
i think the best for you is to keep it as a pneumatic a while to learn the principal behind compressed gass guns. then you make it a combustion and learn some there also. after that just put some gauges and a propane meter and all that stuff on and you got an hybrid.


if you want to know more about hybrids just look at the hybrids at this page :) (feel free to ask question's on peoples hybrids)

Posted: Thu Feb 21, 2008 11:15 pm
by jackssmirkingrevenge
A burst disk between the piston and the barrel will definitely help performance as you're giving the piston time to open more before the pressure actually reaches the projectile.

Posted: Fri Feb 22, 2008 1:48 pm
by Sticky_Tape
Great I will use that for sure burst disk I would like to know what the best fitting is for the piston to be housed in. I bought a 3/4-1/2-1/2 ruducing tee and I don't know if that is the best fitting to use any suggestions?

Posted: Fri Feb 22, 2008 1:57 pm
by jackssmirkingrevenge
The smaller a piston, the lighter you can make it, the less stresses it imposes on your system and the smaller your pilot valve has to be.

Posted: Fri Feb 22, 2008 2:00 pm
by Sticky_Tape
So JSR do you know what fitting I could use?

Posted: Fri Feb 22, 2008 2:04 pm
by jackssmirkingrevenge
housing the piston in the 1/2" tee sounds like it would work, assuming your barrel is 1/4"?

Posted: Fri Feb 22, 2008 2:07 pm
by Sticky_Tape
the barrel is 1/2 inch copper.

Posted: Fri Feb 22, 2008 2:11 pm
by jackssmirkingrevenge
In that case, you'll need at least a 3/4" tee to house your piston.

Posted: Fri Feb 22, 2008 2:13 pm
by Sticky_Tape
I have a 3/4-1/2-1/2 inch reducing tee if that would work?

Posted: Fri Feb 22, 2008 2:15 pm
by jackssmirkingrevenge
As long as the piston is 3/4" in diameter, yes

Posted: Fri Feb 22, 2008 2:17 pm
by Sticky_Tape
I am using 3/4 inch poplar dowel for the piston it's nice and light