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

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» Codex Löffelholz crossbow
by stuckinthemud1 Tue Jan 24, 2023 4:14 pm

» Digitar prodsc
by stuckinthemud1 Sun Jan 15, 2023 2:42 pm

» Troubleshooting
by Andy. Fri Jan 06, 2023 12:29 pm

» Arab Crossbow
by kenh Thu Jan 05, 2023 8:39 pm

» Skane/Lillohus crossbow thread
by stuckinthemud1 Sun Jan 01, 2023 12:22 pm

» Wood Prods
by stuckinthemud1 Fri Dec 30, 2022 12:47 pm

» Colletiere a Charavines crossbow
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» Simplified Löffelhotz speedloader
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» 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

» 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
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» 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


5 posters

    Could I get advise on order of operations?

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    White Oak
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    Post by White Oak Fri Jul 14, 2017 10:59 am

    Hey folks,
      I'm wondering about what to do first in making my crossbow. I have some 1 1/4"x 1/4" fiberglass flat bar. It is Extren brand, unidirectional structural stuff from work. Anyway, I'm thinking about a three leaf stack prod and Skane type (I guess is what it's called, with the peg in the hole...) But I don't know whether to build the prod first then the tiller or what.
      When I build the prod how do I determine the brace height, and the draw length? The stuff is in the garage and I can't remember the lengths but I'm thinking the long one will be 28-30 inches...
      I guess once I have the draw length the location of the peg is self evident and the rest of the tiller can go from there.
      Anyway, any advice or thoughts? 

      Thanks!
    kenh
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    Post by kenh Fri Jul 14, 2017 3:08 pm

    Personally I'd build the prod first.  Once you set a brace height and draw length it will b easier to mark up the tiller from the very beginning.
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    Post by White Oak Sat Jul 15, 2017 6:21 am

    Thanks Ken,

     Is setting the brace height and draw length a judgement call? Kind of "Looks right, is right" For the brace height anyway.
     I guess the draw is a far as you can without breaking anything, minus 10%, haha, however you figure that out. I'm fine with the by guess and by gosh method, just wondering if there is a more certain way.

    Thanks
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    Post by kenh Sat Jul 15, 2017 1:50 pm

    Brace height is usually around 3".
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    Andy.
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    Post by Andy. Sat Jul 15, 2017 5:01 pm

    White Oak wrote:Thanks Ken,

     Is setting the brace height and draw length a judgement call? Kind of "Looks right, is right" For the brace height anyway.
     I guess the draw is a far as you can without breaking anything, minus 10%, haha, however you figure that out. I'm fine with the by guess and by gosh method, just wondering if there is a more certain way.

    Thanks

    Excellent question..... and one I don't have an answer for lol!

    My old recurves have draw lengths twice that of their brace heights, so a 3" brace would have a 6" draw.

    Always exceptions to the rule however, prod material, thickness, nock to nock distance etc etc. Old Excaliburs for example, had lowish brace heights and long draws.
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    Post by Anatine Duo Sun Jul 16, 2017 8:13 am

    On my loose laminate (1/4" lams) prod I am getting 14.5" draw from 28" ntn @ 3" brace.  Going to 4" brace was pushing it.
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    Post by White Oak Sun Jul 16, 2017 11:14 am

    Thank you, that sounds like a good place to start.
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    Bs1110101
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    Post by Bs1110101 Wed Jul 19, 2017 4:02 am

    My thoughts for this would be to make the prod, and affix it to your stock blank, then draw back the bow until you reach what seems to be it's maximum safe draw, then mark that on your stock blank, then work out the trigger and shape of the stock from there. 

    Also i'd like to say if you're working with a pinlock crossbow, you should consider using a wooden roller nut instead, as in my experience any pinlock without an impractically heavy trigger pull or some sort of fancy insert for the notch is at a light enough draw weight that a wooden roller nut could handle it.

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