interneting bazooka firing setup

[Charger]

Figured you guys might find this interesting with your scenario game interest..

I have no clue if this has been down before.. I didn't make it.. a local guy posted it up on one of our local forums.. but I found it interesting..

it's a duel QEV setup to fire a launcher.. no batteries required.. and it actuates very quickly.. unlike the sprinkler valves that seem to open slowly unless you run alot of voltage into them..

anywho.. if you want more info I can put you in touch with the guy.. his write up is below the pic..


http://i18.photobucket.com/albums/b110/Kalauk/01010015.jpg


[BStats:
-3lb aluminum fire extinguisher (approx. 100 CuI) rated to 300 psi, with a 3/4" male nipple JB Welded to the neck.
-All brass plumbing, silver-ish parts are nickle plated.
-3/4" Main firing plumbing consists of a 3/4" QEV connecting the barrel to the chamber via a Tee.
-1/4" Triggering plumbing consists of a shop blow gun connected to a 1/4" QEV , connected to the input of the big QEV.
-1/8" tank fill nipple connected between the QEV and blowgun via a street Tee.
-160 psi pressure gauge (soon to be replaced due to a crack in the plastic casing).
-150 psi safety pop-off valve.
-15" overall x 2" pvc barrel, 12" effective length. (the last 3" are aesthetic).
-Max operating pressure is 140 psi.

Not shown: regulator and fill hoses.

How it works:
-The blow gun actuates the 1/4" QEV, which actuates the 3/4" QEV.
-The tank fill nipple allows me to fill the cannon and walk off, without worrying about depressurization of the cannon when I disconnect the fill hose.

Max range at a 45 degree firing angle and 45 psi is around 400 feet (no typo) with a nerf rocket chronoing at about 130 fps.

This weighs between 5 and 10 lbs, is extremely efficient due to a smaller chamber and using a QEV to fire.
Also gets around 10 fills from a 48/3k tank biggrin.gif [/B]

[Edwin]

Neat.

Sprinkler valves I think are easier to set up than that rig. Tricks to make sprinkler valves work...3 nine volt batteries in series....take apart and drill hole bigger to decrease delay.

I built 4 and 2 didn't shoot until I figured out why it delayed before the main release of air.

[Charger]

I built a couple sprinkler valve ones a couple years ago.. and they worked decent off 2 9v's.. without modifiing the valves..

I liked this setup for the lack of needing any power source to fire.. and it looks more compact then the valve I used.. I may get around to redo'ing them at some point.. but don't have alot of scenario games in this corner of the world to use them at.. plus I have a hard time finding the nerf rockets around here... I had mind setup with quick change barrels.. one for nerfs.. one for tennis balls.. haha.. they fly well I must admit..

[Spitlebug]

Neato. I'd love to do something like that but have it fire paint grenades. I do believe paint grenades are a little too hard to be launching those kinds of distances though.