Nice one Where did you get that cler tube?

Here is a test-shoot

[youtube][/youtube]

FighterAce wrote:

AircannonSweden wrote:I think 5/8 and 3/8 is the same thread....

5 / 8 = .625
3 / 8 = .375

.625 ≠ .375

Capish?

LoL okey

dewey-1 wrote:

AircannonSweden wrote:I think 5/8 and 3/8 is the same thread....

You better understand things better before making statements like that!

http://www.engineersedge.com/hardware/t ... hreads.htm

That didn't tell me anything?

PotatoEnemy17 wrote: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

POLAND_SPUD wrote:

I think 5/8 and 3/8 is the same thread

you just wrote something along the lines of >> 5=3

I don't get it???

I think 5/8 and 3/8 is the same thread....

PotatoEnemy17 wrote:Your pilot valve is bigger than the valve itself

Yeah,I know i have fixed a thing so the piston dosen't fly out when I fire it

This is what i came up with,it is piloted by a 1/2" ball valve!

Guys,i updated with info.....

I didn't know where I would place this thread so....yeah http://i47.tinypic.com/15dtiqw.jpg From left: Air-gun sniper - it is a blow-gun glued to a steel-pipe and i shot .22 long cartridges with it and they go pretty far,about (98-114 feet). The stock is from my old BB-gun! Scuba-tank-cannon - I mad...

Nice gun you got there! :D 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 ar...

MrCrowley: Thank you,it worked with higher preassure

jonesy42: I have already built a cannon with a QEV from ebay

MrCrowley: The piston fits perfect in the housing,when i push the piston forward it is air-tight but when i fill a tank with air(3 PSI or something)it will leak...Well,i should see if a find another material jackssmirkingrevenge: Haha yes :D i have made one more piston that is much shorter,i have ta...

I made this QEV yesterday and I can't get this sealing leak-free...what can i use for material? The piston is kinda big but it is still under construction

Piston and housing



"sealing"