Our very successful offseason project was a pneumatic t-shirt launcher, seen in
this picture. It is a dual tank setup with a water irrigation valve for actuation.
The green tank in the front is the main air reserve tank, pressurized to approx. 120 psi. It goes to the black FRC regulator, which has a maximum output of 60 psi. The 60 psi output goes directly into the secondary reserve tank which is an integral part of the launcher. The seondary tank is the most important part of the launcher because it makes the whole thing work correctly. 1) The t-shirt flies when it has a great volume of air behind it. The secondary tank is connected to the valve by a 1" coupling, literally dumping all the air at once from the secondary tank. 2) The plastic plumbing pipe is not safe to use with 100+ psi of air pressure. 60 psi from the regulator is a safe pressure to use, while the main pressure system of the larger primary tank refills the system after every shot.
Feel free to PM or email me for more details!