SpudFiles

This thread was split and the real author is "max76". It was split because of a language issue.


First off, Welcome to spudfiles!! It's always good to have new members!!

As to your request, we don't like to spoon-feed answers, but you're new, so here are two videos. One explains how to build a QEV, and the other will explain how the QEV works..

HOW TO BUILD:



HOW A QEV WORKS:









Edited by jrrdw.
There was so much italian in this thread I split it the best I could.

Not to mention my tutorial cough cough
[youtube][/youtube]

thx guys.Nice.
when I finish I'll get.
the rest of the gun was ready

Here is my
[youtube][/youtube]

And here is mine

the spring is used or not?

Unless you're pressurising from the chamber side, no real need for a spring.

but when you fire the shot you lose all the air out of the barrel?
I would instead use several times the air of the barrel.

For multiple shots with a QEV you have two options:

- use a secondary chamber and a slide valve as a pilot as in my "under $20" example

- use a spring loaded piston in your QEV and a momentary pilot, such as a hammer valve

jackssmirkingrevenge wrote:For multiple shots with a QEV you have two options:

- use a secondary chamber and a slide valve as a pilot as in my "under $20" example

- use a spring loaded piston in your QEV and a momentary pilot, such as a hammer valve

I'd see pictures of the first model and second model?

max76 wrote:I'd see pictures of the first model and second model?

The first one is explained here.



The slide valve is basically a three way valve.

A three way valve has three ports, which we will call A, B and C

There are two possible paths, AB (with C blocked off) and AC (with B blocked off)

A is connected to the pilot area of the piston

B is connected to your 100 litre tank

C is simply left open to the atmosphere.

At rest, the three way is in position AB. This means your reservoir is filling the launcher chamber.

When the trigger is pulled, the valve switches to position AC. This means the reservoir is blocked off, and is no longer filling the pilot and chamber, while the pilot is exhausted to the atmosphere, which fires the launcher.

Once the trigger is released, the valve goes back to AB, refilles the pilot and chamber and the cycle can be repeated.

The second one would be something like this:



When you pull the trigger the valve opens, when you let go it shuts and the spring resets the piston.

complex

max76 wrote:complex

Well it don't get much simpler then that.

max76 wrote:complex

again, look at this: http://www.spudfiles.com/forums/semi-au ... 23626.html

For less than $20 you can have a semi-auto system buying standard parts from eBay.

max76 wrote:complex

lol, not really.. But You'll learn soon enough, nothing to worry about!! Most people here had to learn how this stuff works!! Me included!!