pic: Simple hook delivery system

[JesseK]

Originally Posted by Kevin_Crossland

Funny enough this is actually almost identical to my original idea. I'm curious, have you passed inspection with this system yet? Is this mechanism legal, it would appear to conflict with rule R76, specifically
"Do not, for example, paint, file, machine, or abrasively remove any part
of a pneumatic COMPONENT – this would cause the part to become a
prohibited item. Consider pneumatic COMPONENTS sacred."
please let me know if this would be legal, cause I'd love to use a system like this on our own robot

It looks like it's a literal air cannon - there are no pneumatic cylinders involved. The fitting isn't modified, it's just attached. Inspection would be easy so long as the housing for the canon isn't PVC, PolyCarb, Fiberglass or other material that is prone to splintering during an extreme failure event.

[Kevin_Crossland]

Originally Posted by JesseK

It looks like it's a literal air cannon - there are no pneumatic cylinders involved. The fitting isn't modified, it's just attached. Inspection would be easy so long as the housing for the canon isn't PVC, PolyCarb, Fiberglass or other material that is prone to splintering during an extreme failure event.

the question I guess would be if it classifies as pneumatic component, I figure if worse comes to worse it's a pressure relief with a conveniently placed harpoon

[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):