The Arbalist Guild

Would you like to react to this message? Create an account in a few clicks or log in to continue.

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

Latest topics

» 12th Century Chinese Crossbow Chronographed
by stuckinthemud1 Fri Nov 24, 2023 3:50 pm

» Crossbow Stock
by kenh Tue Oct 31, 2023 6:19 am

» Colletiere a Charavines continuing experiment
by stuckinthemud1 Sat Oct 07, 2023 5:36 am

» Cocking - how
by stuckinthemud1 Thu Aug 03, 2023 4:24 am

» Questions around heavy crossbow lath buildin
by stuckinthemud1 Wed Apr 26, 2023 1:10 am

» Arab Crossbow
by stuckinthemud1 Tue Apr 25, 2023 7:57 am

» prod angle, and lever trigger for sale anyone?
by stuckinthemud1 Mon Mar 20, 2023 5:54 am

» flexible string
by jasper1978 Mon Mar 20, 2023 1:25 am

» [solved]Skane/Lillohus crossbow thread
by stuckinthemud1 Sun Mar 19, 2023 7:44 am

» jens sensfelder
by jasper1978 Wed Mar 08, 2023 11:58 pm

» 400lb Windlass crossbow bolts weight and accuracy shooting high.
by stuckinthemud1 Sun Mar 05, 2023 2:53 pm

» 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

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

» Colletiere a Charavines crossbow
by stuckinthemud1 Fri Dec 30, 2022 8:54 am

» Simplified Löffelhotz speedloader
by stuckinthemud1 Fri Dec 09, 2022 4:05 pm

» 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
by stuckinthemud1 Sat Aug 13, 2022 3:22 pm


4 posters

    Fixing a bad delflex

    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Fixing a bad delflex

    Post by Daniel Levesque Tue Feb 21, 2017 11:20 am

    Hello everyone,

    I just sinewed an hickory prod a couple of weeks ago and foundd out my deflex wasn't so good at the end. It's not quite even and maybe not pronounced enough. Unless I'm mistaken here, I think you can immerse a wooden prod in water to get the sinew back right ?

    I'd really like to remove the sinew, work the deflex again by re-steaming and bending it and re-apply the sinew on.

    Is that even possible or do you have any better suggestions ?
    hullutiedemies
    hullutiedemies
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?


    Posts : 202
    Join date : 2012-07-03
    Location : Fennoscandia

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by hullutiedemies Thu Feb 23, 2017 2:32 am

    It is supposed to do that.
    Sinew shrinks when it dries, and pulls the bow to reflex.

    The more deflexed limb has stiffer wood or thinner sinew.
    Just test it with long string on tillering stick and scrape the belly from stiffer side until the limbs bends evenly.
    OrienM
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?


    Posts : 195
    Join date : 2014-08-01
    Age : 48
    Location : New Mexico, USA

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by OrienM Thu Feb 23, 2017 7:58 am

    Did the prod change shape (lose deflex) after sinewing? Sinew does shrink as it dries, and can pull the limbs forward in the process. This happens mostly with lighter-weight, more flexible prods...very heavy cores don't tend to move, in my experience.

    If the shape was off before the sinew was applied, you can remove the sinew and re-bend. The method I've used is to keep the prod under water for about 12 hours, then peel off the softened sinew. I've never done this to a non-broken prod, but it should be possible to re-use the wooden core as well as the sinew...dry it out slowly and carefully afterwards, so it won't crack.
    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Daniel Levesque Thu Feb 23, 2017 9:52 am

    Thank you both !

    Actually, I'm not a 100 % sure my prod was bent correctly and evenly from the start so I'll put it in water, bend it again and re-apply the sinew. I'll try to go for a greater deflez too. Thanks again guys ! Very Happy
    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Daniel Levesque Fri Mar 31, 2017 11:40 am

    Hello everyone, I just finished my first build, I'll post some photos soon but so far, I've shot one bolt with it (didn't went through the 30 shots "safety" yet) and, well... let's say I wouldn't like to be in it's path. This Xbow packs quite a punch for sure !!
    OrienM
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?


    Posts : 195
    Join date : 2014-08-01
    Age : 48
    Location : New Mexico, USA

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by OrienM Sat Apr 01, 2017 7:54 am

    Awesome! Can't wait to see some pics. How did the process of reworking the prod go for you?
    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Daniel Levesque Mon Apr 03, 2017 10:36 am

    Went pretty well in fact, I did what you told me. For the sinew, I had to put it in water 6-8 hours, remove what I could and repeat the process a couple of time to remove all of it. I put the prod in my steambox again, clamped it on the form, let it dry and I re-applied the sinew. It comes out pretty strong but flexible. I would guess between 150 - 200 lbs. I can pull back the string by hand but it's not easy.
    kenh
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!


    Posts : 883
    Join date : 2012-08-03
    Age : 75
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by kenh Mon Apr 03, 2017 2:57 pm

    Yu should have let that sinew dry, with the prod unstrung, for at least a couple months, before stringing the prod and using it.  That's how folks who replicate wood/horn/sinew horsebows work.   
    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Daniel Levesque Tue Apr 04, 2017 7:33 am

    Mmm... maybe I chose the wrong words sorry (english is not my main language). I did let the sinew dry on the unstrung prod for a whole month. I guess it's still better to unstring the prod after each shooting session right ?
    OrienM
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?


    Posts : 195
    Join date : 2014-08-01
    Age : 48
    Location : New Mexico, USA

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by OrienM Tue Apr 04, 2017 8:26 am

    Glad to hear the re-work went so well! Very Happy

    While some bowyers do let sinew dry and cure for a year, I tend to leave it for only a month or so. I live in a desert, which probably speeds the drying process up quite a bit.

    Definitely do unstring the prod when not in use. Any wood bow left strung will take a set eventually, and lose power.
    Daniel Levesque
    Daniel Levesque
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 65
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Daniel Levesque Tue Apr 04, 2017 11:13 am

    Nice ! seems like I'm doing the right thing then ! Very Happy

    Sponsored content


    Fixing a bad delflex Empty Re: Fixing a bad delflex

    Post by Sponsored content


      Current date/time is Mon Mar 18, 2024 9:36 pm