Posted 29 May 2004 - 01:48 AM
Posted 29 May 2004 - 02:02 AM
I'm using a threaded steel rod for my plunger shaft so I'm attaching the plunger head with nuts and some washers that are just smaller (OD) than the OD of the PVC I'm using. The down side to this is the weight of all that metal and the inertia that comes with it so I'm testing the strength of various epoxies in large voids like that.
Posted 29 May 2004 - 08:58 AM
Use 1" CPVC (For the plunger tube), 1/2" CPVC (For the plunger), 5/8" Rubber Gasket (Theres two sizes, get both and try them) and you'll need a 1/2" CPVC Endcap and coupler. You'll also need a bolt that fits in the gasket, and some washers and hex nuts. First you need to drill a hole in the center of the endcap the size of your bolt. Next, put these on your bolt in the following order: washer, gasket, washer, hex nut, then put the washer through the endcap hole, then add another washer and hex nut. It'll look somthing like this:
I - gasket
: - washer
= - hexnut
( - encap
then, pvc glue the endcap to the end of your 1/2" cpvc. Now all you need to do is add a spring, and close off the plunger tube ends.
Posted 29 May 2004 - 12:29 PM
What are your opinions on just avoiding the plunger rod entirely, and instead priming the gun via a mobile barrel?
I'm trying to operate off this kind of system with my current Crossbow incarnation ([37/32" ID] 1" PVC shaft to 1/2" PVC coupler with 5/8"ID tubing on inside end, allows mobile 5/8"OD barrel or locked 1/2" PVC barrel), using a round, lathed (Power drill! Whee!) 7/16" Dowel to lock with the trigger mech, and a two-spring system, combined with an Arrow water bottle cap (cheep) to keep the thing straightened. It works, certainly, but I'm just not a big fan of barrel-mounted breeches with that much resistance, so any system like this, implemented on anything I use, is going to require a distant priming handle, using either a rod or a cord to carry the force. The hard part, of course, is getting this thing to look pretty. Not only that, I'm missing the aesthetics of the original plunger handle's position. The only real advantage is freeing up the stock to hold, say, a high capacity 1.5" PVC pressurized air tank for an air [Semi-automatic/regulated?] valve.
Yes, I'll be keeping a look out for that gasket. Not to poopoo O-rings, I just don't know if I'll find an 38/32">O-ring>36/32" at my local hardware stores. They're really horrible for stocking any O-ring greater than 1". If all else fails, there's always... Tape?
Excellent ideas, guys.
Posted 29 May 2004 - 08:01 PM
Cx, is your xbow all back together and working?
Zero, why not relocate the charging handle to the stock, like a stock xbow? You could also put the charging handle in the foregrip like a real-steel gun.
Posted 30 May 2004 - 09:29 AM
The last picture is the pump fitting into 1/2" ID PVC. To make this into a plunger type thing you could use a larger ID PVC and a larger rod. Then you should use a washer or something on the longer end of the rod while it has the electrical tape on to put the spring on. Then you get the spring, the endcap and glue it all together.
Posted 30 May 2004 - 04:11 PM
Told you, Zero! In your FACE!
If all else fails, there's always... Tape?
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