my second 6mm. custom QEV sniper airgun updated

[jackssmirkingrevenge]

Blow forward valves add dead space and rob energy from the projectile, especially if not made to very tight tolerances.

Consider a simple tee magazine with a detent:

[1nxtmonster]

For my tee detent I drilled two holes in the tee and then inserted a zip-tie for a detent.

[bladeul2006]

thanks "Talk"for the ideea but youre wrong, absolutely no air passes through the magazine hole because the push-forward piston directs the gaz beyond the magazine hole as I fire the gun, the problem is the piston (as the gas travels through the piston, pushing it forward, it looses velocity -> lowers FPS) I'l try to increase the gas flow through the piston and manufacture a much softer retuning spring

sorry but my english is not that good what is a "detent" ?? maby a picture of it ...

[jackssmirkingrevenge]

detent, something which stops the BB from rolling out of the barrel.

[dart guy]

Jsr it looks like it will act like a hop up, if the projectile is round.

[jackssmirkingrevenge]

Neat huh

[bladeul2006]

nice, thanks, looks good

[bladeul2006]

so I went to the country and I had some target shots from 15 meters, my scope was off a little bit because I had to asemble the gun on site. hope you like it

[youtube][/youtube]

[bladeul2006]

hy there, so I took your advice and made a detent loading mech, I think it achived semi, but I tested it on a lower gas pressure, because my co2 tank was nearly empty. Anyway, here are some pics, video will come when I'll carge my co2 tank.
It still needs some finishing.

[bladeul2006]

more pics ...




hopefuly some advices

[bravootome]

r.
Tell me where from did you brought the pipe for barrel, If it is a cooper pipe if must know it's diam is 6,3.. not 6.

[bladeul2006]

what you meassured was in inches, meaning 1/4" you must search the pipe in metric units. (I work with this king of pipes, don't realy know where you can buy it, especialy in small quantities)

[bladeul2006]

do you think this concept will perform better than my current one on regulated 30 bar pressure ?

[jackssmirkingrevenge]

I don't think a hammer valve will give you more power unless you make one with exceptionally good flow struck by a decent hammer. What a hammer valve will allow you to do is tune the air usage to maximize number of shots per tank.

[bladeul2006]

Hy there, it's been a while, since I worked on my BLD3 hammer-valve project.
I replaced my steel qev piston with a plastic one, much more light than the previous one, with a better fit; also added a spring behind it.
overall I feel a much better performance than before(better BOOM sound), and also less gas lost with the pilot(thanks to bravotoome).