Picture of Pneumatic Cannon 1/2 inch
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This Cannon is my 2nd to instructables but the very best out of my other cannons. (in lethality, distance, power, and odd-looking. The also has the best advantage of being 1/2 barrel diameter, meaning it fires Paper darts, NERF DARTS, double A batteries, firecrackers of the right size, airsoft BB's, and anything else that you can find.

it's a lot bigger than it appears

the double A batteries are not to be shot at anyone
so lower the pressure if you are going to shoot it at someone. and not at their face

Step 1: Materials

Picture of Materials
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1-1 inch PVC pipe (8 feet standard I believe)
2-1 inch end caps
1- tire replacement valve (auto parts store)
2- 1 inch, 45 degree angled elbows
1- 1 inch T valve
1- 1 inch elbow
1- 1 inch non threaded/threaded 1/2 inch adapter (elbow)
1- 1/2 inch threaded pipe (6-8 inches, depending on preference)
1- 1/2 inch threaded pipe (14 inches long, or how ever long you need your barrel
1- 1/2 inch threaded on both sides ball and socket valve

Other parts:
PVC Cement
PVC Primer
Silicone (optional for leaks)
Bike Pump W/ A GAUGE! (a compressor just doesn't work very well)
Tape Measure
Pen ( To mark cuts)
DanTDM1 year ago

This is really cool, but if you use a QEV like I did it will be more powerful.

DanTDM1 year ago

This is really cool, but if you use a QEV like I did it will be more powerful.

make some darts from the tiki dart instructable pump the gun to max psi and shoot. I've heard that at 180 psi they can go quarter mile.
you  rock!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
oohhhhh yeah lol thanks
pbpenguin5 (author)  Thelonelysandwitch6 years ago
two problems with that, i like seeing out of both of my eyes. and those are made for a straw, where this barrel is around .50 caliber.
just make big ones
qballcat6 years ago
(removed by community request)
receiver5457 years ago
dude i made one of those! you think 40 psi stinks try being shoot by a paintball out of it at 145psi . ( i used 3/4 in pvc instead of 1/2 in.)'
pbpenguin5 (author)  receiver5457 years ago
lol nice
tony488 years ago
Could you please explain the valve assembly a little better for me
dude its simple !!
pbpenguin5 (author)  tony488 years ago
the valve, barrel, and piece connecting the rest of the body or compression chamber is threaded, so they all screw into place and are surprisingly airtight if you do it right. i don't know if that answer's your question or not haha.