Ei paha. Pitänee siirtyä hybrideihin jossain välissä.

Clean and compact build. And impressive performance. I like it!

Hehe, I like your triple barrel idea! Gotta make me one of those someday (If only we had cheap PVC around here... But maybe copper then)

And that valve is huge :shock:
I bet it has some serious power even though I like pistons more.
Even color of your valve is far better than those ugly light green ...

Reading some posts at "pneumatic cannon discussion" area will do wonders. "Search" button is your friend also.

This topic made it.. I definitely need to get my hands on a fridge compressor!

Would be interesting to see what distances could be reached with an arrow/crossbow bolt as ammo and 500 psi pressure. :shock: Well, probably you wouldn't ever see your projectile again.. But still..

Now just give them ...

iknowmy3tables wrote:..oh man that gives me an idea put a micro black hole in a high tolerance chamber, attach a bomb send to enemy planet and detonate the bomb, and out grows a black hole, man screw the death star, black hole bombs can implode planets

haha, that was my first thought when reading the article

My copper QEV launcher has 2 meters long barrel made of 8mm ID copper pipe just for this purpose.

Aluminium crossbow bolts are nice fit in the barrel if you cut off the vanes and add an earplug to the hollow end of a bolt (for airtight fit in the barrel). These actually are quite accurate even ...

This is how I did it with my gun:

http://img216.imageshack.us/img216/9841/teeve4.jpg
Not on scale of course :roll:

I soldered 35mm copper pipe into 1,5" brass nipple. It was quite loose fit but when I added 35mm copper coupling inside the brass nipple, it was perfect.
Works like a charm ...

I'm not exactly sure if this is what you were looking for. Although it seems you're more interested in those videos than the actual post and I'm quite certain these are the same videos.

http://www.youtube.com/user/MushiYoshi

Those fittings are for water drains etc and are probably not rated for pressure. Closest hardware store here sells same stuff.
But I guess it's ok for combustion.

Nice looking cannon.