Quote:
Originally Posted by asid61
What is the small cylinder in the back of the barrel for?
I really like your design, it looks very neat. You could remove the twist axis if you wanted to to add stiffness (just turn the robot instead) but your way could be more interesting.
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That appears to be the firing mechanism. We used the same design for our cannon. It pushes the cartridge forward and activates the release of stored pressure at the same time. This also provides a good deal of safety with our cannon because it cannot fire over the pressure that is used to push the cartridge forward. In our case that pressure is 30 PSI, I don't see a lot of others running that low of pressure however.