[Torrance]

We roll our T-shirts by simply folding the sleeves/edges up to the collar and then rolling from the collar down to bottom edge. We typically use 1-2 rubber bands to hold the shirts together. While this is not the most compact way to roll a shirt, they end of pretty small and also don't fly like bullets, making them a lot safer to shoot.

We tried to have such a large shot capacity purely for ease of maintenance. We will typically go to 2 or more outreach events with Shockwave before we have to take it back to a scuba shop for re-filling.

The large block in the back that holds the globe motor and a pneumatic cylinder for rotating/indexing was the most complex part on the robot. However, we found that a rotating barrel is simpler is better at managing the indexing of the shirts that a linear magazine.

There is no special sealant between the block and the barrels. The block simply has a conical-shaped output that lets the air through a polycarbonate plate that the back of the turret slides nearly flush against.

Hope that helps!