pic: Simple hook delivery system

[joeojazz]

What type of pneumatic cylinder do you use?

[s_forbes]

Ours just uses the pneumatic cylinder as the latching mechanism to release the crossbow. We just used a 1" or 2" stroke 3/4" bore cylinder. The latex tubing stores all of the energy that fires it up to the bar.

I put the parts into CAD based on memory, since the real mechanism is in the bag. Here's a better angle (click for bigger image):