Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 48 users online :: 5 registered, 0 hidden and 43 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

QEV sensitivity

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

QEV sensitivity

Unread postAuthor: Pilgrimman » Thu Feb 14, 2008 1:23 am

I have a 3/4" QEV, and I want to know just how sensitive they are to triggering. I have heard that they are sensitive enough to be tripped by leaky threads, but I want to know for sure. What would you suggest for a pilot valve?
  • 0

Yeah, we wouldn't want to anger the bees, now would we??

I HATE YOU BEES! I HATE YOU BEES! I HATE YOU BEES!

LMAO Classic!!!! I love Family Guy!
User avatar
Pilgrimman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 481
Joined: Thu Jun 28, 2007 1:10 pm
Location: Grants Pass, OR
Reputation: 0

Unread postAuthor: Novacastrian » Thu Feb 14, 2008 1:50 am

I would suggest using the biggest pilot you can find, remember to keep it ergonomic too. As long as it can be activated easily by one finger- my vote goes to a blowgun, or one of brian the brains snap valves.
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: TNW_NL » Thu Feb 14, 2008 1:47 pm

Blowguns work fine in general I think.
Still, flow has to be as large as possible. I fired my first pneumatic with a bicycle valve turned loose, and it significantly increased opening time of the QEV. When I left out the valve entirely performance was much better.

You can easily hear if flow is sufficient or not. If it isn't, the time the compressed air uses to escape into the barrel can be noticed. It should be one short, loud bang :)

Also, slight drops in pressure in the pilot line can set off the QEV totally or partially. When it was set off partially the QEV seemed to resonate, turning my spudgun into some sort of horn :)
  • 0

User avatar
TNW_NL
Private
Private
 
Posts: 12
Joined: Fri Dec 07, 2007 6:13 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Thu Feb 14, 2008 4:04 pm

well honking is also possible... IMHO you should use a ball valve either 1/2" or 3/4"
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: ShowNoMercy » Thu Feb 14, 2008 4:07 pm

I have a 1.5 inch QEV and my blowgun pilots it well enough. More often than not it fires before the blow gun is all the way open.
  • 0

Jesus saves, no need to pray
The gates of pearl have turned to gold
It seems you've lost your way
User avatar
ShowNoMercy
Brigadier General
Brigadier General
 
Posts: 1094
Joined: Mon Mar 19, 2007 8:08 am
Location: Jersey Bitches!
Reputation: 0

Unread postAuthor: dewey-1 » Thu Feb 14, 2008 4:31 pm

--
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'