Limited stroke?

[MrForbes]

I think there's a crude sketch on our forum, under the "Mechanisms" section.

Should be highly confusing, we spent several hours today trying to get everyone to understand it! so don't feel bad if you can't figure it out....

basically two 10" by 2" bore cylinders next to each other connect to two bars, that fling the ball up and out of the robot. The trick is the start out partly extended and under pressure, so there is lots of stored energy available to send the ball flying. The magic latch is not shown on the drawing, of course, and needs to be figured out! but we think we have several ideas that will work.