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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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» Troubleshooting
by Cscott Tue Nov 15, 2022 11:55 am

» Fiberglass H-bows
by c sitas Sat Nov 12, 2022 8:44 am

» Bad Antler
by drawknife Sat Nov 12, 2022 3:48 am

» Anyone make their own bolts?
by Juniper Mon Oct 17, 2022 8:20 am

» Colletiere a Charavines crossbow
by stuckinthemud1 Sun Oct 16, 2022 3:39 pm

» Josef alm in English
by Juniper Sat Oct 15, 2022 4:22 am

» Qin/Han lock drawings
by kenh Fri Sep 23, 2022 8:16 pm

» stirrup dimensions?
by stuckinthemud1 Thu Sep 01, 2022 1:49 pm

» Skane/Lillohus lockbow information needed
by stuckinthemud1 Sun Aug 14, 2022 6:23 am

» need help contacting le musee Dauphinois Grenoble
by stuckinthemud1 Sat Aug 13, 2022 3:22 pm

» Low Draw Weight Build
by stuckinthemud1 Fri Aug 12, 2022 3:09 pm

» Trigger testing Rig/Jig?
by ora8i Fri Aug 12, 2022 1:13 pm

» best type of horn to use..
by stuckinthemud1 Fri Jun 24, 2022 6:13 am

» Han Dynasty Chinese Crossbow
by hullutiedemies Fri Jun 17, 2022 1:00 pm

» Drawing of Crossbow
by stuckinthemud1 Fri Jun 03, 2022 3:01 am

» "How To Make Everything": Early Crossbow
by stuckinthemud1 Thu Jun 02, 2022 3:41 am

» Black inlay
by stuckinthemud1 Fri May 13, 2022 3:18 pm

» Roller nut details
by drawknife Thu Apr 21, 2022 2:44 pm

» 330#/7" wood bow
by Anatine Duo Tue Mar 29, 2022 11:08 am

» starting a 1400's replica
by stuckinthemud1 Thu Feb 24, 2022 1:26 pm

» 18th century German crossbow reproduction
by Fangbows Sun Feb 20, 2022 7:15 am

» replacement for baleen?
by tghsmith Mon Jan 17, 2022 9:30 am

» Medieval crossbow finished
by stuckinthemud1 Wed Jan 12, 2022 3:05 pm

» Trigger mechanisms
by stuckinthemud1 Mon Jan 03, 2022 10:23 am

» Finish wooden stock
by stuckinthemud1 Sat Dec 25, 2021 9:06 am


+4
kenh
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8 posters

    CNC Improved Chinese Trigger Xbow- Gnome style

    Gnome
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    Post by Gnome Mon Jul 11, 2016 6:00 pm

    First topic message reminder :

    Hey all,
    Jaeger22 was good enough to send me a prototype assembly of the trigger mech he designed that is available now on eBay. This is the rig I've built around it so far, using what I had in the shop. I've ordered a couple of the final units that I expect delivery of this week, I will drop one of those in and this thread will be more of a review of that offering than a build-along. It may be a bit of a stress test, as well, as I'm mating it up with a 165# steel prod, the SB BB from Slobows
    CNC Improved Chinese Trigger Xbow- Gnome style - Page 2 WP_20160711_19_06_32_Pro_zpsu4kp0lnm
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    Post by c sitas Wed Aug 10, 2016 8:07 pm

    Gnome, I'm an old target archer. I have about a ton of pins similar to what your using. Also , send me a pm if you would be interested in a slider sight to do the same job you show ,only alot more.I'm not selling anything.
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    Post by Gnome Sun Aug 28, 2016 3:18 pm

    I'm calling it done, for now. I learned a few things, so that's always good.
    CNC Improved Chinese Trigger Xbow- Gnome style - Page 2 Liz02_zpskgwpcvlj
    CNC Improved Chinese Trigger Xbow- Gnome style - Page 2 Liz01_zpsmculfijp

    Things I learned:
    1. The only real problem with the first build was shock and noise on firing. I think there were several factors involved. The first thing I discovered was that in routing out the cavity for the lock mechanism, I had allowed enough space underneath for the claw component to travel downward far enough to clear the string, but not nearly enough to allow it full range of travel. My cheekbone was really sore for a few days after taking it to the range for the first time, and I think a big part of it was that mechanism striking the stock right in front of my face like a hammer! I thought about just grinding it out, but I kept thinking that energy has to be transferred somewhere, and if it isn't to the wood then it would be to the lock mechanism and it's mounting. I decided to grind out the cavity just a bit and glue tiny pads of thick leather to soak it up. Seems to be working well.

    2. I didn't have too much down force with the string, too little! I forgot that a feeling came over me as I was sanding the bolt track, and I purposefully sanded the middle of the track down while leaving it high at the front so that it would soak up energy from the string at the end of it's travel when fired. Then I totally forgot about that when it came time to string it up, and tried to get the string to just kiss the track in the undrawn position! That was the real culprit with the excess noise and shock.

    3. I wrapped the prod tightly with paracord to see if it would muffle the twang at all. It doesn't, but it looks kinda cool. I'll probably take it off, but will try the trick again with a fiberglass prod.

    4. The can of linseed oil I've been using for years finally dried out, the finish on most of my pieces has been linseed oil and beeswax, mainly because that's what I had. When I went to the store I decided to try out tung oil instead. Holy crap, it's awesome. I only used wax to fill a few imperfections.

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    Post by Gnome Fri Sep 16, 2016 5:02 pm

    This design keeps evolving. I can't keep anything simple. This is how I'm taking it out this weekend, hopefully:
    CNC Improved Chinese Trigger Xbow- Gnome style - Page 2 WP_20160916_17_43_43_Pro_zpslyjmjgwf

    I got rid of the paracord and added leather pads at the limb tips. Now to see if they help with noise at all and stay in place. I was happy to find that the walnut handled cocking rope I customized for my very first crossbow fits this one pretty well, too. The binding hole serves pretty well to keep a field point at the ready.
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    Post by 80Eight Sat Sep 17, 2016 3:39 pm

    Jaw dropping beautiful.
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    Post by jaeger22 Tue Sep 20, 2016 1:12 pm

    Wow! Very, very nice! And good idea about adding some padding under the action to soften the impact with the stock. I have had the jarring on several of my testing builds but did not know why. I may try some hard rubber for a pad.
    John

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