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First Pneumatic Rifle Set Up

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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First Pneumatic Rifle Set Up

Unread postAuthor: INC Jack » Thu Jul 16, 2015 3:29 pm

Hey Guys,

I'm realy new in this forum and I'm glad to found it, alot of you build awesome Rifles ^^.
I'm planning to build my first semi-professional Air-Rifle and want to try to build all valves by my own.

What do u think about my Set-Up?
Will the pistons work in the way how i want them to work?
And what do u think about my "Custom-QEV-Construktion".

I'm thankfull for all hints to make it better.

Here is my functional sketch.
At the moment there are some missing O-Rings, but i think u will see where I'll go to insert them ^^.


Greetz Jack
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INC Jack
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Country: Germany (de)
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Re: First Pneumatic Rifle Set Up

Unread postAuthor: Doodmens » Fri Jul 17, 2015 11:50 am

Hello Jack,

First of all, welcome to the spudfiles!

You have great ambitions and your sketch look professional.
I take you have acces to advanced machinery, otherwise you wouldn't get very far.
I do see that you have quite a bit of 'dead space', between the QEV and the oneway valve.
This air gets wasted, so for efficiency keep this volume to a minimum.

With selfmade valves and such, safety is the greatest issue. Before you use it, I'd advise you to test your gun thoroughly.
I used an old fridge and some mirrors so that I could read the pressure of the manometer of the gun inside the fridge,
while being behind a solid wall. Test your setup 10-40 times, depending on how much you trust its strength.
For the testing, you should go higher than your intended working pressure, like 30-50% higher.

Furthermore, I'm interested to see future development!
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