Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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streetfire
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Thu May 19, 2011 1:34 pm
this is my first rifle (that works!) it fires homemade darts at a max of 30 bar
pic here
the gun
sight for the show
28 bar can go further
the damage
![Image](http://i286.photobucket.com/albums/ll118/jblaterfire/IMAGE_028.jpg)
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Copperboy
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Thu May 19, 2011 1:42 pm
Nice gun!
Don't bother pumping above 3 bar or so, before you´ve opened that ball valve the dart will be long gone.
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streetfire
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Thu May 19, 2011 1:51 pm
Copperboy wrote:Nice gun!
Don't bother pumping above 3 bar or so, before you´ve opened that ball valve the dart will be long gone.
really? it gets more range with more bars at 17 normal firing pressure it goes 120 + meter
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FighterAce
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Thu May 19, 2011 1:57 pm
He's exaggerating... a bit... you can't use all of that potential at 30 bar with no firing mechanism and such a short barrel. I think you'd see a bigger improvement by speeding up the ball valve with a spring instead of increasing the pressure.
EDIT
Don't go over 28 bar!! I had a similar pump and the pressure gauge blew off at over 30 bar with a large chunk of the plastic body. Those little pumps are Not safe for large chambers and for pressures higher than 28 bar. Thats why they say "do not go over 28 bar" on the package.
Build yourself a stirrup pump... you'll get higher pressure, more volume and more durability from it.
“The combined synergy of a man and rifle is matchless.
The steadiness of hand, the acuity of vision and finally
the art of knowing how to make the rifle an extension of the
body all equate to the ultimate synthesis of man and machine.”
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streetfire
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Thu May 19, 2011 2:07 pm
FighterAce wrote:He's exaggerating... a bit... you can't use all of that potential at 30 bar with no firing mechanism and such a short barrel. I think you'd see a bigger improvement by speeding up the ball valve with a spring instead of increasing the pressure.
my next gun will have a qev and a longer barrel although the barrel is already like 40 centimetres long
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Doctore
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streetfire
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Thu May 19, 2011 4:06 pm
FighterAce wrote:He's exaggerating... a bit... you can't use all of that potential at 30 bar with no firing mechanism and such a short barrel. I think you'd see a bigger improvement by speeding up the ball valve with a spring instead of increasing the pressure.
EDIT
Don't go over 28 bar!! I had a similar pump and the pressure gauge blew off at over 30 bar with a large chunk of the plastic body. Those little pumps are Not safe for large chambers and for pressures higher than 28 bar. Thats why they say "do not go over 28 bar" on the package.
Build yourself a stirrup pump... you'll get higher pressure, more volume and more durability from it.
how do you make a stirrup pump?
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streetfire
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Fri May 20, 2011 2:24 am
jackssmirkingrevenge wrote:If you're feeling creative you can
spring-load the ball valve with a bit of effort.
The above design is for a semi-auto repeater, if you reverse the spring and trigger dynamics you can make a single shot fast valve.
thanks for te pic but i know how to make it spring loaded its just that my new project with a qev is already under way so i didn't put much more effort in it