SpudFiles

bravootome

a good qev like my 8 mm one opens perfectly with the piloting semiauto i got, at every pressure, rather 5 or 30 bar . still if your piston would be good made, it should work as well with a hammer. i think i got what was the problem = larger the diameter of the piston compared with the sealing surfac...

bravootome

how do you see the piston diameter in relation with the sealing surface diameter in order to a good decompresion.

bravootome

AS a pilot, i made a sort of a push of a buton valve, i control the consistency but not for eachshoot,, cuz it self regulated by a 3rd valve that makes this auto regulation. i control only the power of shoots by a spring inside the 3rd valve. there is a diagram of my pilot in my previos post. i choo...

bravootome

. But and here is the main problem I am having. I need someone to help me on how I would build a very simple trigger mechanism that has a bolt and trigger so that each time I cock the bolt and shoot it strikes the hammer valve on the fire extinguisher causing the round to be fired such as a pellet o...

bravootome

When you whrited a perfect QEV i see that design!

i meant, that will work perfect.

bravootome

How is the piston sealing face attached? Also, you don't need the spring. I USED SUPERGLUE, the spring is needed when you inflate with air, or the piston is pushed back an air exits the barrel. soka, a floated and noched o ring would be just as good if i use o-ring i wouldn't get semiauto with what...

bravootome

wyz2285 wrote:photos? I'm not sure if your piston is too tight (so only high pressure moves the piston).
Obviously slower you open the pilot, slower the piston opening (on a non-airtight piston)

bravootome

jackssmirkingrevenge wrote:http://www.ebay.com/itm/CHLED-1-2-Inlet ... 27d9da6bab

i got same thing back here but without o-rings. machined.

bravootome

photos? I'm not sure if your piston is too tight (so only high pressure moves the piston). Obviously slower you open the pilot, slower the piston opening (on a non-airtight piston) no, it not tight. at my other gun, doesnt matter how fast i push the pilot, it works the same,a good bang. i notice th...

bravootome

i am working on another qev fully machined so i avoid all those problems i had before, i mean a perfect piston in a perfect body. it is a multishoot. this time the problem is that when i press to shoot that bang is not there, is only a fsssss, the bang comes at higher pressures over 10 bar( but stil...

bravootome

i like that tractor you got there. what do you use it for ?

bravootome

I should have called it an auto-bolt. This thing is what you put between your valve ( qev-piston-whatever) and your barrel. It's not your firing-valve. Used in this video: i understand how it works, but a part of the force is loosed by pushing fwd the piston, and what remains is transferred to the ...

bravootome

Brian the brain wrote:The blow-forward valve is actually a blow forward bolt: it loads projectiles automatically.

( deleted )

this valves is only for low power you cant have the power of a qev or hammer valve this way

bravootome

Brian the brain wrote:Ah...
I experimented with that quite some years ago..Never followed up on it.
I might have to reconcider...

You've made it work and look very well!

i had some headache cuz wouldn't function correct. i wish i had a chrono but i am pretty sure it is over 1000-1200 on it max power.

bravootome

I get how it pilots and how the second valve shuts...but what makes it release the built up pressure so you can pilot again?
Does it have a small leak?[/quote]

Yes, it has a small leak ! actually the semiauto valve doesnt contain a rubber washer, its a con shape that allows not a perfect seal.

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