Catapult issues with boulders

[wilsonmw04]

Originally Posted by tr6scott

To me, the issue with the new balls is the stickyness of the coating, not squishyness of the ball. So it appears that you use a vacuum generator to hold the ball, the funnel and the hose. I do not know your sequence, but I would look at making the vacuum a little less effective with a new ball. maybe some slits in the funnel? Maybe releasing vacumm prior to shooting, then move arm? Maybe move the vacuum funnel towards the bottom of the arm.

We have nothing that fancy. The cup is simply a drip pan from a stove.

[wilsonmw04]

would it make sense to increase air flow to the cylinders? would two solenoids per cylinder work (or even legal)?

[notmattlythgoe]

Originally Posted by wilsonmw04

would it make sense to increase air flow to the cylinders? would two solenoids per cylinder work (or even legal)?

Are you using high flow solenoids? We used them in 2014 on our pneumatic catapult. To increase flow even further we allowed the return port on the cylinders to vent to atmosphere.

[ollien]

Originally Posted by wilsonmw04

would it make sense to increase air flow to the cylinders? would two solenoids per cylinder work (or even legal)?

It's not legal. See R90. That being said, what's the flow rate of your solenoid?

[JesseK]

Quick observation - it looks like the one on the right sits higher in the catapult 'cup' or 'tray' than the other one. More of the ball is exposed rather than supported.