iImage Information

This is a photo of a T-shrt cannon I have recently built. I plan on using it at pep rallies at the school where I teach. I am hoping the students spirits will get pumped up by having school T-shrts launched at them. Maybe they will be "blown away" by this cool cannon.
However, when powered up to 110psi (max power) I could shoot through the goalposts from the opposite end zone.
Mine was a bit different from yours; I used 3" PVC as the pressure chamber and a 2' long 3" barrel but used a 1" QEV instead of a sprinkler solenoid to discharge the air. The QEV was attached to a 1/2" sprinkler solenoid as another quick air release, and the total firing time was less than 1/10 of a second.
I'll try to gather some pictures; it's at home and I'm at school 200 miles away...
I also made one with a piston valve but that's a bit much for firing t-shirts.
:-)