SpudFiles

The Raptor
I set out to build a pneumatic sniper rifle for paintballs, but due to lack of funding and some slight redesigning I have ended up with something a little more powerful and, in all honesty, fun!

The barrel and chamber are both 1m long, the barrel is 25mm diameter and the chamber is 40mm diameter. The valve is a modified sprinkler valve. Unfortunately the particular devise that i purchased has a guide rod so I had to drill off to the side which caused quite a problem when it came to sealing the cannon. Because the barrel is slightly too big for a paintball it also allows for some more inventive ammo choices. Hows the penetration of rocks (no wadding) through this 3mm aluminium?

I decided to test the accuracy by setting up a cradle 20m away from a large piece of cardboard. The chamber was filled to approximately 80psi and fired. The problem is that the valve had quite a severe leak during the testing so the air pressure was no always the same. The picture shows a line of four shots, between 60cm of each other as well as a single shot 30cm off to the left. My guess is the differences can be accounted for by slight differences in pressure and paintball shape (I use second-hand paintballs from a skirmish joint next door to us) as well as a shot where the gun was not properly in its cradle.

I have had one accident already. At 6m and 40psi a paintball shattered a car window despite it only hitting the very bottom of glass. Since then I have decided to not fire anything over 60psi due to the risk in the case of an accident.

You may have noticed that the cannon does not have a butt however it uses t-pieces instead of 90 degree elbows. This is because it will get a mini-butt later.

The Raptor was a fast, silent and deadly creature, lacking the brute strength of a t-rex or sheer size of a brachiosaurus, without sacrificing any of its power. I see this weapon the same way as opposed to the massive combustion that a friend has built.

If you would like to ask anymore questions please e-mail me at: sodman2k@hotmail.com

lookin sharp, is there any reason that you used a T fitting instead of elbows?

probably because he didnt have the proper elbows

Nice cannon and welcome to spud files.

Excellent! It've very clean!

Nice cannon. Also, I'm glad somebody actually put some thought into naming their cannon. I'm really sick of seeing 5 different BFG's. When I make a cannon I'm gonna call it the MJOLNIR, the hammer of the gods.

Hi first post, been a pyro for a while now. only a couple of minor burns and one major ones. but anyway i'm a good friend of 'sods' anyway i helped out on this gun and i just wanna say it SCARES me lol. great design.

hey sean just seen ur cannon its pretty neat!love it good work like the name to!

what size is the sprinkler valve?

the valve is 25mm (1inch).
Watch this place because i will be posting lots of updates to go with the updates that i have made to the gun.
SNEAK PEAK: I can now fire a paintball 200m with 25psi...