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High power Qtip gun.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: mark.f » Sat Nov 26, 2011 9:06 pm

warhead052 wrote:Its charged to 90 psi and a 2-6 psi drop in pressure every time I fire, so it lasts a long time. I get about 100 shots from full to empty.


You do know how division works, right? :lol:

J/K, but I do think there is something wrong with that statement.
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Unread postAuthor: warhead052 » Sat Nov 26, 2011 9:21 pm

mark.f wrote:
warhead052 wrote:Its charged to 90 psi and a 2-6 psi drop in pressure every time I fire, so it lasts a long time. I get about 100 shots from full to empty.


You do know how division works, right? :lol:

J/K, but I do think there is something wrong with that statement.


Its a big chamber....
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Unread postAuthor: Gun Freak » Sat Nov 26, 2011 9:22 pm

It doesn't matter how big the chamber is lol :lol:
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Unread postAuthor: warhead052 » Sat Nov 26, 2011 9:30 pm

Gun Freak wrote:It doesn't matter how big the chamber is lol :lol:


An average of a 2 psi drop is alot...
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Unread postAuthor: MrCrowley » Sat Nov 26, 2011 11:16 pm

If yo have 90PSI in the chamber and after each shot the pressure drops 2PSI, you don't get 100 shots out of one fill.

That's what Mark and Gun Freak are going on about :wink:
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Unread postAuthor: warhead052 » Sat Nov 26, 2011 11:27 pm

Its not always 90 psi, its just the average, and I don't think I even drop 2 psi....
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Unread postAuthor: evanmcorleytv » Sun Nov 27, 2011 12:00 am

warhead052 wrote:Its not always 90 psi, its just the average, and I don't think I even drop 2 psi....


You just reduced the level of drop from 6 to 4 to 2.. what next? The only way you could even get CLOSE to 100 shots per fill is if you dropped 1/2 PSI each shot at 90 PSI.. lol
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Unread postAuthor: Fexo180 » Tue Nov 29, 2011 5:53 am

warhead052 wrote:Its not always 90 psi, its just the average, and I don't think I even drop 2 psi....


LOL.. I fill my 1.5kg FE to 145 psi.... for a "one shot deal". Man those AA battery's sure grow some wings. :twisted:
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Re: High power Qtip gun.

Unread postAuthor: EpicMadness » Tue Nov 29, 2011 8:21 am

warhead052 wrote:When I say high power, I mean it. I put one through my sheet rock and had to tell my parents I put a tack in the wall to hang a poster instead of tape. And my trigger failed for it and my brother walked past the barrel just as it failed, and it shot him in the back... No pictures, I can't afford to lose over $300 worth of parts in my room.

On to what I need to know, is there any way to tone this down without losing too much power? I still need to be able to shoot this, just with out my parents thinking its super powerful and I need to get rid of all my pneumatics/combustions/hybrids. So, any suggestions? I have thought about limiting flow, but at the same time I want to use this as an airsoft rifle, but dip the ends of q tips in wax to give them weight to fly further.


there are tons of ways, some of them is like what you've suggested, limiting the flow, and another is putting an adjustable relief valve between the barrel and the hammer valve, this'll leak the excess pressure instead of making the projectile accelerate faster.

btw, 90-150PSI divide it by 2PSI drop per shot is not equal to 100, not even higher than 80. you'll have to ramp up the tank's pressure to about 200PSI, thats more than double of your tank's usual pressure.
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