Homemade ball-valve airgun?? small air-chamber?

[josephlys]

Hi I'm new here, my name's Joseph. So I'm interested in a simple ball-valve spudgun, that offers multiple shots from 1 pumping. So--

What size/how small do you think an air chamber can be if I'm using light naildarts 45gr. And using 100psi. Anyway Im gonna use 1/2' pvc pipe, ball valve and this concept eg.

http://nerfhaven.com/homemade/zero_ballvalve/
"The bottom pic: Modified ball-valve homemade"
-Refer to bottom pic-
---
This would give me how many shots? & wouldn't the pressure get lower with each shot if you do this Will it get weaker each time you let air in the main-firing air-chamber. The large secondary chamber will feed the "first small chamber" with pressurized air, so I need to know if doing multiple shots this way will still gimme 100psi in the smaller firing chamber after a few shots.
And what do you think of the small air-chamber @ 100psi. Will it shoot a light dart really flat, I wanna do some backyard plinking at targets.

[jackssmirkingrevenge]

Unless you plan on spring loading the firing ball valve, it won't be powerful or accurate enough even for satisfactory plinking.

If you want multiple shots and good performance, I refer you to my recent demonstration, adequate even for those on a very low budget:

http://www.spudfiles.com/forums/semi-au ... 23626.html

[josephlys]

Its just a concept, I'll worry bout the accuracy and the way I fire the ball-valve smoothly. I know that using the full/big air chamber will certainly produce good results, what I'm curious about is the small chamber @ 100psi.
And if I get multiple shots from 1 filling with this method, will the pressure in the smaller chamber steadily decrease with each shot, or do I get a few full power/pressure shots? Thank you
I'm just starting out so something simple would suit me. Thanks again

[josephlys]

http://nerfhaven.com/homemade/zero_cutlass/

Think this would work? Can a garden hose nozzle handle 100psi?
Is the high pressure hose idea good?
Sorry for so many questions.

[jackssmirkingrevenge]

Think this would work? Can a garden hose nozzle handle 100psi?

I used one for 90 psi here.

There's a world of knowledge on this forum, why start such a primitive design when you can make better stuff for the same effort? Wise enough not to jump in the deep end, but don't walk over a puddle either

If you're going to use a garden hose attachment, might as well use a blowgun.

Blowgun + 100psi + reasonably long barrel = decent power.