Air Cannon

[Tytus Gerrish]

pretty much cant beat co2. as long as there is liquid in your tank you get about 1100 psi. all you need is a fat needle valve like a garden nozzle .shown here. get all the brass fittings and PVC at home depot and take the tank adapter off a paint ball gun and there you go a potato gun. or t-shirt cannon. or mega super soaker depending on what size PVC you use. guarantied not to catch fire and provide you with hours of fun.

[sanddrag]

Is that unregulated CO2 going into a garden hose nozzle? Most garden hose nozels I've seen are absolute junk. I'm no expert, but that just doesn't look safe to me. I wouldn't trust a garden hose nozzle to that kind of pressure.

[Tytus Gerrish]

Originally Posted by sanddrag

Is that unregulated CO2 going into a garden hose nozzle? Most garden hose nozels I've seen are absolute junk. I'm no expert, but that just doesn't look safe to me. I wouldn't trust a garden hose nozzle to that kind of pressure.

this is some oddball forged steel nozzle. it has silicon rings and seals witch dont become frozen and dont crack. you can get it home deopt in the garden section for about $10

[amos229]

make sure to reinforce the pvc barrel i have seen them explode

[OZ_341]

Team 306 (Corry Robotics) brought a T-shirt shooting robot to our Ramp Riot Competition last November. I would look them up. They did an awesome job.

[Cody Carey]

Originally Posted by OZ_341

Team 306 (Corry Robotics) brought a T-shirt shooting robot to our Ramp Riot Competition last November. I would look them up. They did an awesome job.

Yes we did, although its not very rapid fire, we charge it with 2 standard KOP air compressors, and the tank is (pressure rated) PVC. All we used for a firing mechanism was a solenoid from a sprinkler system, and it seems to work well . we used the proper adhesive to attach the end caps onto our tank, and even though it all checks out safety-wise, I still don't like to stand in the way of where the tank ends are "aimed". Some kids tried to emulate our tank with wood glue and non-rated PVC and put a hole through our schools door with the PVC cap.

[Gabe]

XInventions has a great area on air cannons and combustion cannons. First look at their combustion TP launcher (yes, toilet paper), get the general idea, and then look at their air cannons.

http://www.xinventions.com/main/spud/home.htm

Cool project!

[Tytus Gerrish]

Originally Posted by amos229

make sure to reinforce the pvc barrel i have seen them explode

mechanical force always takes the path of least resistance. in this case air pressure. will always escape the easiest way it can. so as long as you don't have something jammed in the barrel so hard that it wont move, witch in the case of a potato or A T-SHIRT is practically impossible for the pressure to escape by breaking through the barrel. the pressure will escape by pushing the potato out of the way. so here is some safety advise, just for good measure use at least sch40, and don't cram junk in the barrel. and defiantly don't try to stick it into the ground and fire it and don't fill the barrel with water and try to launch that. the recoil will easily fracture your ribcage. never launch a t-shirt directly at someone launch it in the air and let if fall on them. I'm sure you all remember how Maude Flanders died on the Simpson's. other than that have fun dispensing t-shirts