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

Latest topics

» What string material is safe for Alchem Steel prods
by Geezer Mon Oct 15, 2018 4:11 pm

» Finished Crossbow - Thanks to all - here some pic and if anyone wants info let me know happy to help .
by globalmark Tue Oct 09, 2018 5:12 am

» yew and sinew prod help needed
by stuckinthemud1 Sat Oct 06, 2018 4:40 pm

» Ball shooting Crossbows worth the bother
by Seventeen76 Wed Oct 03, 2018 10:59 pm

» Crusader crossbow
by stuckinthemud1 Fri Sep 28, 2018 1:54 pm

» Plans and materials for my first build
by chilihook Mon Sep 24, 2018 11:53 am

» carving on early crossbows
by stuckinthemud1 Sun Sep 23, 2018 10:32 am

» invisible joints in bone spine-inlay
by Geezer Wed Sep 19, 2018 12:43 pm

» My 2nd crossbow project - german crossbow with cranequin
by MePilot1 Mon Sep 17, 2018 6:44 am

» Getting the best accuracy from a crossbow
by dutchbow Fri Sep 14, 2018 1:45 am

» Pictures of crossbow I have been build
by chaz Thu Sep 13, 2018 2:02 pm

» Sharp bend in the tickler
by Geezer Tue Sep 11, 2018 3:11 pm

» Bolt weight to prod poundage
by Geezer Mon Sep 03, 2018 7:10 pm

» Commecial slingshot crossbow
by chaz Wed Aug 29, 2018 1:20 pm

» The Arbalist Guild - Around the World
by chrisgo Tue Aug 28, 2018 10:18 am

» making my first crossbow string
by stuckinthemud1 Sun Aug 26, 2018 2:04 pm

» Looking for some help Identifying this crossbow
by Geezer Sat Aug 25, 2018 11:15 am

» Knot to secure nut twine?
by c sitas Fri Aug 24, 2018 8:28 am

» bolt rest advice
by stuckinthemud1 Mon Aug 20, 2018 4:23 pm

» what depth to Install a Prod and angle
by globalmark Fri Aug 17, 2018 11:19 am

» tickler taper
by stuckinthemud1 Thu Aug 16, 2018 2:25 pm

» any sneaky hints and tips?
by stuckinthemud1 Sat Aug 11, 2018 5:57 am

» Greetings from Central Connecticut
by chilihook Wed Aug 08, 2018 6:09 am

» how deep should I recess the nut?
by stuckinthemud1 Mon Aug 06, 2018 11:19 am

» Marble Shooting Crossbow
by JacobL Mon Jul 30, 2018 12:27 am


    Fixing a bad delflex

    Share
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Fixing a bad delflex

    Post by Daniel Levesque on 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 ?
    avatar
    hullutiedemies
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 179
    Join date : 2012-07-03
    Location : Fennoscandia

    Re: Fixing a bad delflex

    Post by hullutiedemies on 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.
    avatar
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 160
    Join date : 2014-08-01
    Age : 42
    Location : New Mexico, USA

    Re: Fixing a bad delflex

    Post by OrienM on 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.
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Re: Fixing a bad delflex

    Post by Daniel Levesque on 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
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Re: Fixing a bad delflex

    Post by Daniel Levesque on 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 !!
    avatar
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 160
    Join date : 2014-08-01
    Age : 42
    Location : New Mexico, USA

    Re: Fixing a bad delflex

    Post by OrienM on 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?
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Re: Fixing a bad delflex

    Post by Daniel Levesque on 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.
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 769
    Join date : 2012-08-03
    Age : 70
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Fixing a bad delflex

    Post by kenh on 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.   
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Re: Fixing a bad delflex

    Post by Daniel Levesque on 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 ?
    avatar
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 160
    Join date : 2014-08-01
    Age : 42
    Location : New Mexico, USA

    Re: Fixing a bad delflex

    Post by OrienM on 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.
    avatar
    Daniel Levesque
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2016-12-06
    Location : Quebec, Canada

    Re: Fixing a bad delflex

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

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

    Sponsored content

    Re: Fixing a bad delflex

    Post by Sponsored content


      Current date/time is Sat Oct 20, 2018 6:09 pm