Woah thats Gnarly

Very nice design... Looks very comfortable.

It has some kind of powerful sense to it. Would be a complete peice of perfection with a scope.

Very Nice ... Good clean build and nice breech load system, though you should cut out some of that pilot volume.

I say pneumatics, they are so versatile and easy to control... Not to mention combustions are more illegal here (NSW, Australia).

**Quoted from the wiki** The goal of an optimal ratio is to have the barrel end at the exact point where the projectile stops accelerating. The ratio will vary somewhat depending on the weight, friction, diameter and blow by of a particular projectile, as well as the fuel, ignition type and perhaps ...

My mistake...

What pilot valve are you using?

With a ballvalve and a quick connect you shouldnt need that "Y"

Edit: Oh, and may I suggest using PVC rather than Wye...

YOU BRING THIS UP WITH NO PICS OR VIDS!!!!

I demand carnage evidence...

Painting the inside of the barrel sounds like a bit of a waste of time if ask me... tissue wadding should do the trick...

Remember not to use to much fuel...

You do need oxygen to attain ignition...

Some pics would really help...

My Birthday is tomorrow!!!!

**Sigh** That would be good old NSW... where spudguns are also illegal.. ...

Well hopefully this time next week I will have my L's...

Then I can start my journey on attaining 120 freakin hours of experience...

@Hannoc

Take a look at the spudwiki... it should explain things for you.

The bottom cannon will work... and will inflict reasonable carnage... :D Though it would be referred to as an "inline" and would be better suited in the pneumatics discussions. :wink: I would go for the bottom design, the blowgun would be more useful with a solenoid valve or piston cannon. EDIT: Oh ...

Looks fun... You could safely take it higher than 50 psi... I dont know how much higher exactly, but ive heared of bottles make it to 200psi without exploding or cracking. But im sure 80-100psi should be safe.

I use that exact sprinkler valve on my cannons ... Got mine from Bunnings

That cannon is beautiful...

I agree with STHORNE... a cannon like that deserves a fuel metering system.