CQEV Cannon
Posted: Mon May 30, 2011 5:29 pm
Here's a cannon I've been tinkering with for a while. It uses not one, but two QEVs, so I've dubbed it the CQEV (Cascading QEV) cannon. It's probably not the most efficient use of two QEVs but I've been accumulating parts for a while now and had them lying around. Here the specs
Main Valve: 3/4" Deltrol QEV
Secondary valve(s): 1/4" Deltrol QEV & 3-way push button valve
Barrel: 1/2" Copper (pictured), interchangeable with 1/2" or 3/4" PVC barrel (not sure of the lengths exactly)
Ammo: marbles, AA batteries, empty co2 cartridges... anything that fits
Extras: secondary exhaust noise dampener (also functions as a stock), breech-loading, paintball gun grip, barrel support, safety-valve
The "secondary exhaust noise dampener" is just the extra piping attached to the exhaust of the smaller qev. The longest 3/4" pipe section is filled with some steel wool and a home made baffle (some rubber disks with spacers on a threaded rod) and it reduces the extra noise from the secondary exhaust a noticeable amount.
Typical operating pressure is around 100 psi. I have a 115psi pop-off relief valve on it right now so I can't take it any higher than that. I plan to replace it with an adjustable pop-off in the future. You can't see the 3-way DCV very well in the pictures because of the grip but I know some of you are familiar with this type of valve. It's rated for 115 psi but I know other have used it at higher pressures. Anybody have any idea what kinds of pressure these DCVs can handle (or what the potential risks are operating them at higher pressures)?
The DCV allows bolt-action-ish potential with a constant air source (all I have is a bike pump right now), or even semi-auto if I make a reloading mechanism. I'd like to try for semi-auto, I have a double-acting air cylinder I think I can manage something with, but there're lots of kinks to work out still.
I'd like to make a wooden frame/stock for it to make it look a little neater while keeping compactness in mind. Maybe something similar to a production rifle, any ideas?
Lemme know what you think.
Main Valve: 3/4" Deltrol QEV
Secondary valve(s): 1/4" Deltrol QEV & 3-way push button valve
Barrel: 1/2" Copper (pictured), interchangeable with 1/2" or 3/4" PVC barrel (not sure of the lengths exactly)
Ammo: marbles, AA batteries, empty co2 cartridges... anything that fits
Extras: secondary exhaust noise dampener (also functions as a stock), breech-loading, paintball gun grip, barrel support, safety-valve
The "secondary exhaust noise dampener" is just the extra piping attached to the exhaust of the smaller qev. The longest 3/4" pipe section is filled with some steel wool and a home made baffle (some rubber disks with spacers on a threaded rod) and it reduces the extra noise from the secondary exhaust a noticeable amount.
Typical operating pressure is around 100 psi. I have a 115psi pop-off relief valve on it right now so I can't take it any higher than that. I plan to replace it with an adjustable pop-off in the future. You can't see the 3-way DCV very well in the pictures because of the grip but I know some of you are familiar with this type of valve. It's rated for 115 psi but I know other have used it at higher pressures. Anybody have any idea what kinds of pressure these DCVs can handle (or what the potential risks are operating them at higher pressures)?
The DCV allows bolt-action-ish potential with a constant air source (all I have is a bike pump right now), or even semi-auto if I make a reloading mechanism. I'd like to try for semi-auto, I have a double-acting air cylinder I think I can manage something with, but there're lots of kinks to work out still.
I'd like to make a wooden frame/stock for it to make it look a little neater while keeping compactness in mind. Maybe something similar to a production rifle, any ideas?
Lemme know what you think.