SpudFiles

Here's my latest project. Its an air rifle with a 4 foot long 3/4 inch barrel made to shoot spent 12 gram CO2 cartridges. I carved the stock and grip by hand from a single piece of teak. All the metal plates also started out as raw sheet metal that I cut and filed down by hand. I decided to go with a manual valve for simplicity and the fact that the solenoid would have been in the way.

Nice fusion of traditional and modern materials, it has a quirky yet pleasant look damage pics/videos!

Why even have the wood pistol grip behind the blowgun? To me, it looks like it would get in the way...Anyway, overall nice build. And like jack said, GET DAMAGE PICS/VIDEOS!!!!!

Ran into a little bit of trouble testing the gun today. Apparently a glob of fiberglass resin doesn't seal up the old pilot valve port on the sprinkler valve. Would a glob of easy-mix epoxy (the stuff that comes as a cut-and-knead stick) made to patch plastic tanks work any better? If not, what would?

If you want epoxy to stick to plastic you have to roughen it first, a file is a good idea, dremel is even better

After three failed attempts to seal the valve with epoxy, I managed to plug the leak with some superglue and test fire the gun. All the shots were taken from about 15 feet at 80 psi. Not pictured is a piece of 2x4 that I couldn't break (it was pretty small and kept getting blasted away)

Superglue will eventually fail. Have you tried taking the valve apart and sealing it from the inside?

I filled the hole where the solenoid was with epoxy, but air still slowly seeped out from around the plug. I just used a little superglue on the inside of the valve to fill in the corners where the epoxy couldn't get.

very nice! what did you use for the barrel? it looks like 3/4 schedule 40

Cool gun you got there. you gotta use the two part liquid type epoxy not the knead stuff. j b weld is the best use that cuz the super glue wont last forever. also did you let the epoxy set long enough, like over night?? I bet you didnt. Well nice cannon man...

I used Bondo fiberglass resin. The mixture is mostly resin with only a few drops of catalyst mixed in to get it to harden. I scratched up the inside of the hole pretty well, but no matter what I did it wouldn't completely seal. I let the thing sit nearly a week before I put any pressure behind it.

Ya last time I ckecked bondo isnt made for pressure, epoxy however is,,,,

Try cutting the cartridges in half and weighting them with a bit of lead melted into the nose, they will fly straight.

jb weld dude, clean the area , fill the hole with epox y , let it dry 24 hrs then have fun!!!!

whats kinda range you getting from it?