SpudFiles

Hey guys, first time builder here and have been researching site for a little over a week now. Have majority of my gun designed and parts bought except trigger mechanism. Plan for gun is

Tank-4" x 36" galvanized steel sch 40
Barrel-2" x 72" galvanized steel sch 40
Valve- 3/4 inch qev valve
Air source-helix air compressor

As you can see it is a mortar rather than a handheld. I would like to be able to trigger the release of the qev from a distance of around 30 feet. Does not have to be wireless. Any ideas? I have searched site and have not been able to find a way. Was planning on at first just hooking a ball valved onto hose near air compressor but am worried that will hurt qev performance. Thanks form the advice.

Tie a string to a ball valve or a blowgun and pull it to trigger.

I am sure a well lubed ball valve will work just fine. It has a high flow, and a QEV should be able to be piloted by a schrader or presta valve.

Maybe you can spring load the ball valve for smoother opening when pulled by a rope.

You can click the link in my signature to see a spring loaded ball valve. In theory you should be able to connect a rope to the trigger, and a short and gentle pull would be enough.

Gun Freak wrote:Tie a string to a ball valve or a blowgun and pull it to trigger.

That would be the simplest answer, though it must be said, 3/4" QEV on a 2 inch barrel is not really going to give you great performance due to flow restriction. A 1.5 inch sprinkler valve would be a much better idea.

buy a remote control car and a solenoid valve. Wire a push button switch on the solenoid valve and have the steering servo hit that button.

or try this you will need a 9v in place of the 2 AA though

Crna Legija wrote:buy a remote control car and a solenoid valve. Wire a push button switch on the solenoid valve and have the steering servo hit that button.

... that would be rather dangerous in terms of accidental triggering due to radio interference...

Would this plan work guys, thanks for the ideas.

http://www.spudfiles.com/forums/launchi ... rt,30.html

jackssmirkingrevenge wrote:

Gun Freak wrote:Tie a string to a ball valve or a blowgun and pull it to trigger.

That would be the simplest answer, though it must be said, 3/4" QEV on a 2 inch barrel is not really going to give you great performance due to flow restriction. A 1.5 inch sprinkler valve would be a much better idea.

How much would one cost? Are you talking about a solenoid valve?

A 1 1/2 q e v would be perfect for this set up, and I think I know of a person getting rid of one at a very fair price. If you want more details, feel free to p m me!!

http://amzn.com/B000MXNJ7G

It says 18, but you can buy off amazon for around $10

It is wireless, can handle to amperage and voltage needed and super easy to hookup.