4 replies to this topic

[Z4]

This is an addition to my original CPVC Crossbow modification (there's a link in the sig). I like the modification, but desired a higher ROF. This is my solution. The turret I constructed is similar to BobaFan's and Rork's, but it's different enough, and I've never seen this applied to a Crossbow. My main aim was to produce a interchangeable turret system that did not include a large range drop (>5').

It is assumed at the beginning of this writeup that Part I has been completed.

Materials:
1/2" CPVC
1/2" CPVC endcap
3/4" CPVC
1/2" PVC
1/2" PVC couplers (2)
#9 O-ring
Loctite Epoxy Putty
Cable ties
Hot glue
Duct tape
1/8" polycarbonate (opt. but strongly suggested)

Tools:
PVC style pipe cutters
Dremel
Cutting wheel attachment
Grinding attachment
Hot glue gun
Screwdriver

Here we go!

Start off by putting a small length of PVC into one end of a coupling. Repeat this step for the other coupling.

Using a Dremel, grind out the ID of the PVC for each coupling until 1/2" CPVC slides through it smoothly.

Grind down the OD of the 3/4"CPVC until it can be inserted into the other end of the PVC coupling. The piece should be about 2 1/2" long.

You now have the completed inner part of your turret.

Take a 10.5" piece of 1/2" CPVC, line it up as pictured, and cut a notch out of 1/2 the circumference.

Now take the Dremel to the front of your Crossbow ( ) It should look about like this. (Mine is a little big, there used to be an internal 2k integration and the barrel was a little below the new hole)

Now using liberal amounts of hot glue and cable ties, attach the axis to the plunger tube/coupler. I used a few small 1/8" polycarbonate scraps for additional reinforcement, and I strongly suggest doing so.


You can now put the internals back in and close up the gun. (I didn't but I didn't know. You can).

Cut a 2 3/8" piece of 1/2" CPVC. This is the "bridge."

Stick the "bridge" into the coupling, and add the #9 O-ring. Use another piece of 1/2" to tap it in better. I'm going to glue the O-ring in because it kept falling out, see what works best for you.

THE TURRET!!! It can have up to seven barrels. I find six to be a perfect balance though.

It is removable to be rear loading and clippable.

On the 'bow:

The Crossbow has a Falcon Super Strap. I really suggest putting one of these on each and every primary you own, they're awesome. I also printed out a original Nerf sticker to put on the side. I love it.

Advancement is an easy motion. I find that I can get off one shot every 1.25 seconds or so.


Ranges (fired flat at shoulder height) are in the high seventies and low eighties. My Crossbow seems to have bad ranges, I'm still experimenting with barrel lengths and types.

Questions, comments...?

Edited by .Z4., 13 September 2008 - 12:46 PM.

[Renegademilitia15]

Wow, nice ingenuitive turret idea. I can't really think of any other comment except I am curious what the range decrease is.

[Nonsense Man]

Why would the range decrease. It is the same thing as a couplered crossbow just with the barrels made into a turret.

[Z4]

First post updated with completed turret and ranges.

Renegademilitia: The range decrease appears to be no more than 5', which is what I was hoping for. I'm still not that happy with the ranges though, I'm going to be doing some more tweaking.

Nonsense: The barrel doesn't actually nest over the air output hole. There's a short bridge, but the O-ring nearly eliminates leaking.