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Ever find yourself needing to tar and feather someone, but lacking an angry mob to back you up? Maybe you wish to exact quick and messy physical reven...
As usual, you'll need some bits and pieces. Here's a shopping list to get you started. For the gun: 2" PVC tube - 11 inches 1.25" PVC tu...
For the sake of compactness, I initially decided to have the pressure chamber contained within the grip (or stock) of the gun. Once I started building...
The pressure chamber needed two carefully drilled holes, one for the bike inner tube valve and the other for the pressure outlet to the trigger and ba...
The actual drilling was very straightforward with a pillar drill. Notice in the fourth picture here that the hole in the PVC tube is slightly larger t...
Once I had everything neatly aligned, I glued the bushing and the inner tube valve in placed with superglue then Plumbing Goop. Lots and lots of Plumb...
To make the cartridges, I cut six 5.5-inch lengths of the 1.5" PVC tubing and sanded down any rough ends so that they wouldn't tear their covers later...
The barrel was made from an 11-inch length of 2" PVC tube, sawn at a 45° angle about 1.5 inches from one end. You can see here how it was designed to ...
To my mind, the coolest part of this entire project is the cartridge ejection mechanism. It's so satisfyingly chunky and robust that I found myself wa...
I anchored the spring inside the barrel of the gun by passing it through a pair of holes drilled just inside the barrel's non-diagonal opening.
The next step was to give the loose end of the spring a good surface with which to push cartridges. I wanted a short length of tubing that would be ab...
At this stage, I noticed that when I pushed the plunger all the way into the barrel, the spring tended to protrude from the open end of the barrel and...
I now had a spring-loaded plunger that would shoot out of the gun's barrel and bounce around like a jack-in-the-box whenever it was released. While th...
Now that I'd made the ejection mechanism for the barrel, I needed to make the fixed end off which it would hinge. A much simpler piece to make, this w...
I used plywood to construct a simple frame that would hold the various PVC components of the gun together. I sketched the pieces on paper first, fold...
I hand-cut several small plywood ribs that would fit snugly around the barrel and attach to the frame. I glued all of these in place with superglue, ...
To attach the bicycle pump to the pressure chamber, I cut a piece of scrap wood into shape and glued it between the two components. As the pump itself...
I cut a few more pieces of plywood to connect the plywood barrel frame to the grip, then glued these in place. After that, I used Plumbing Goop to fix...
To keep the barrel closed tightly, I again used plywood to mount a pair of powerful neodymium magnets above the hinged opening. I then used sugru to ...
To help me out on the battlefield, I made a very simple bandolier out of duct tape. I started by making one long loop of tape, then backing it with a...
I used the following fillings for my cartridges: Shaving cream Flour Medical waste (a mixture of raspberry Jell-o, chocolate pudding and ...
The firing process is very simple: Make sure the ball valve is closed. Tear a cartridge off from your bandolier. Open the breech. Loa...
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Posted:
Aug 5, 2011
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