First QEV cannon(With damage-pics and video)

[AircannonSweden]

I am finally finished with this...The tank is a scuba tank and the QEV is piloted by a 1/4 inch ball valve! I will weld the nipple on sunday

Pics:








Damge-pics

This was a syringe-handle shoot with 3 bars from 2 feet! You can see the dent in the wood!


I shoot a lego-brick into a soda-can and it destroyd the plastic box!

In:


Out:

[doomburger]

Nice gun you got there!
I'm pretty sure that's a slide valve with a QEV, so it should be pretty nice going semi auto. I strongly suggest that you put a elbow on the chamber (im guessing its the vertical black tube) to make this gun much more compact and imho, better looking too. If you switch around the elbow and add a tee at the end, it could become a stock too. Post some more info/pictures and damage shots!

[AircannonSweden]

Nice gun you got there!
I'm pretty sure that's a slide valve with a QEV, so it should be pretty nice going semi auto. I strongly suggest that you put a elbow on the chamber (im guessing its the vertical black tube) to make this gun much more compact and imho, better looking too. If you switch around the elbow and add a tee at the end, it could become a stock too. Post some more info/pictures and damage shots!

Thank you i will replace the tank later,i have a soda stream CO2-tank at home but i gonna buy a hex-nipple first

[PotatoEnemy17]

Awesome, How big is your QEV? Also, what is the ball valve for, you already have a slide valve, right?

[AircannonSweden]

Awesome, How big is your QEV? Also, what is the ball valve for, you already have a slide valve, right?

The QEV is 3/8, I bought the QEV on ebay for 9 dollars,the ball valve is the pilot-valve

[PotatoEnemy17]

I get it now. I thought that blue thing was a slide valve. I just finished my QEV air cannon yesterday.

[AircannonSweden]

I get it now. I thought that blue thing was a slide valve. I just finished my QEV air cannon yesterday.

Okey Did you make or bought a QEV?

[PotatoEnemy17]

I bought one off Amazon for 7 bucks. I tried unsuccessfully to make one before but I'm thinking about giving it another shot. (pun not intended)

[AircannonSweden]

I bought one off Amazon for 7 bucks. I tried unsuccessfully to make one before but I'm thinking about giving it another shot. (pun not intended)

Okey

[AircannonSweden]

I am finished with the gun and I added some pics! Look at the top (update august 2012)

[PotatoEnemy17]

With all the camber volume I bet it's loud. How much pressure? Damage pics?

[AircannonSweden]

I will do some damage pics tomorrow and the chamber preassure is about 6-8 bars

[Zeus]

Booo, needs to be semi. But your threading work is clean, which is good to see. And the pilot volume is delightfully small.

And the chamber could be a 1/50 of the size without a decrease in power.

[AircannonSweden]

Thank you I know the chamber could be much smaller but i had a bulkhead laying around and that fit perfectly in the tank

[AircannonSweden]

I welded the nipple today, it was a little leak in the welding-spots but i fixed it with plastic-paddings super-steel! I will put up some damage-pics later