The disc version is not structurally sound enough
I am also concerned about this, so I'm trying to think of ways of reinforcing it. However, notice that neither of the priming discs are going to receive any impact forces - all of that will be on the plunger head. In that sense, they only have to be strong enough to prime the blaster.
and the one with 2 bolts and 4 slots would be a bitch to make and the bar that is being pushed back could just rotate and slide between the two bolts.
I honestly don't understand why everyone hates cutting slots in PVC tubing. It is super easy
. Just use a dremel and a diamond cutting wheel. It takes literally 45 seconds to cut, and the result is very straight.
I'm also going to cut small notches into the T handle so that the screws force it back into alignment when you prime the blaster. If that doesn't work, I'll think of some other way of doing it.
Also, none of your designs have any way of indexing the plunger rod to keep the notch from rotating out of contact with the catch.
I've thought of some little tricks to help with that. Worst case scenario, I can switch over to square plunger rods.
I'm going to build at least one of these designs this weekend, so we'll see if they work. CAD drawings are not real life.
Edited by Daniel Beaver, 12 October 2010 - 05:13 PM.