The reworking of the turret had me going back to where I should have started: the PVC aisle. I had originally intended to build the turret out of two 3" drain endcaps (flat ended endcaps), but those apparently don't exist. However, I found something way better:
Does this part scream "turret" or what? It's the same diameter as the OD of 3" PVC. The inner socket fits1/2" sched 40, or, as luck would have it, 1/2" CPVC endcaps. The inner hole is a perfect fit for 1/2" CPVC. The outer holes are a near perfect fit for 19/32" brass. I just had to tcut off the nub at the top.
EDIT: General Cole reminded me that I should probably say what this is called. It's a 1/2" schedule 80 socket pipe flange, and I found it in with all the other PVC at Menard's. (I didn't see it at Home Depot, but I didn't ask, either.)
Here's the other half of the equation:
This is an outlet cover, 3" diameter, perfect match to the pipe flange. I had traced my air and center hole already. I found this part at Home Depot (but not at Menard's, oddly enough).
I added a spring, and used another endcap to hold it on. The air delivery tube is superglued, and then hot glue sealed. The hole is very close to the edge of the cap, so I had to cut off a side of the tube, to make it fully cover the hole.
Here's the exploded view (minus barrels):
I usually tend to post works in progress, so I have a few things to finish:
1. Add a 3" endcap over the front to support the barrels, give a good surface to grab, and give a place to mount the indexing system
2. Install the indexing system. I have one designed, which will give a positive feel for when the barrel is aligned with the airhole.
3. Get another barrel. I'm still out of brass. Hopefully this weekend I can get another couple sticks.
4. Cut a larger hole in the bottom for rear loading. The bottom barrel will be loadable.
As far as future plans, I think I'd eventually like to try making this an 8 barrel system, but I'm not sure it'll be enough foam left to make a seal. I'll try that later. Also, I intend to make a scaled down SNAP for this to live on: breech barrel for range, 4 shot turret for close action.
Edited by Carbon, 25 July 2007 - 07:51 AM.