SpudFiles

This is the FINAL design for the cannon/rifle I'm building this weekend. Instead of the old design, the chamber is now 3 in. X 12 in. At 150 PSI the GGDT says I can get 106 foot pounds and 550 fps with a 50 gram projectile. The valve is a modified sprinkler with a 1/4 in. ball valve actuator. The barrel is 30 in. long and is shc. 40 3/4 in. PVC. It is now also a muzzle loader due to its raw power.

There will be some dead space in that design. How bout you bridge the upper and lower parts of the stock and plug the rest.

that dead space wont matter because the valve is at the barrel...if the valve was at the chamber isnt that dead space??? (i know i am probly wrong but thats always what i thought) yell at me if u want but thats what i thought...maybe (most likely) im wrong...correct me

I'm probably going to cut a custom piece of wood to put in between the sock and then glue it in between.

No, you're right.

Dead space is empty space that has to be pressurised by the released gas before it reaches the projectile.

There shouldn't be a problem with having the stock pressurised.

Flow restriction might be a factor, it would be more economical to take the shortest route, such as from the chamber, 2 x 90° elbows, then to the valve, and attach a stock on the back, like so........



or similar.

good luck.
skinner

spudthug wrote:that dead space wont matter because the valve is at the barrel...if the valve was at the chamber isnt that dead space??? (i know i am probly wrong but thats always what i thought) yell at me if u want but thats what i thought...maybe (most likely) im wrong...correct me

You're right. I'm not all there sometimes.

The stock is actually part of the tank.