off-season launcher

[Da Kid]

so now that it's the off-season, our team is building a t-shirt launcher. we plan on having three barrels that do not rotate or anything. i have some questions for the cd community so that our team can make the optimum robot.

1. what is a good diameter for the barrels? I've seen 2, 2 3/8", 3", and even 4"(and also how do you fold the shirt for the size designated)

2. if we wanted a distance of say 100 feet how large would the secondary holding tanks need to be? (we plan on using a sprinkler valve to release the air)

3. what is a good size for the hosing and specifically what is a good way to connect it to the tanks?

4. we plan on pre-loading the main tank to 120 psi with an actual big compressor and recharging between each set of shots with the 2009 compressor. (there is plenty of time for that since the barrels have to be reloaded manually.) would a 5 gallon tank be to big for what we're doing? what would a good size be?


also would the 2010 kop wheels(6wd) be good enough for a high school football game halftime(as far as the softer maybe slightly muddy ground)? what if we made them double wide?