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

Latest topics

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

» Plans and materials for my first build
by chilihook Wed Sep 19, 2018 6:18 am

» 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

» Finished Crossbow - Thanks to all - here some pic and if anyone wants info let me know happy to help .
by Geezer Tue Sep 11, 2018 3:16 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

» Ball shooting Crossbows worth the bother
by topfmine Mon Aug 06, 2018 2:25 am

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

» My first Crossbow
by Geezer Sun Jul 29, 2018 8:58 pm

» bridle eye horn re-enforcing examples anyone?
by stuckinthemud1 Sat Jul 28, 2018 5:19 am

» Blocked pictures by Photobucket
by topfmine Sat Jul 28, 2018 3:18 am

» Italy palio tournament style bullet bow
by septua Wed Jul 25, 2018 7:22 pm


    making my first crossbow string

    Share

    stuckinthemud1
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2014-02-05
    Age : 50
    Location : south wales valleys

    making my first crossbow string

    Post by stuckinthemud1 on Sat Aug 25, 2018 4:56 am

    My yew and sinew lath has been curing for 6 weeks, so its time to tiller it. I am hoping the final draw weight will be in the region of 150lbs.  I have made about a dozen flemish twist bowstrings but never made a crossbow string.  So, how do I measure it, and should I go with flemish twist or endless loop?  Also, I use 18/4 barbour linen thread for my bow strings and was planning on doing the same here, any thoughts?
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1060
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: making my first crossbow string

    Post by Geezer on Sat Aug 25, 2018 8:05 am

    For medieval crossbows, you've got a choice. Western and southern European crossbows usually use a continuous loop string.  Central/eastern and northern crossbows, particularly those with horn/sinew prods mostly use a knotted string that is double-thickness at the ends.  You should be able to find videos online that show the process.  I got the hint from Harmuth's "Die Armbrust' pub. 1986.  Making continuous loop strings is very straightforward.  Making the knotted ones takes some practice.  Geezer.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1060
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: making my first crossbow string

    Post by Geezer on Sat Aug 25, 2018 8:21 am

    Geezer here with a correction: I did a quick search online and couldn't find anybody with a video showing how to make a properly knotted string.  One guy was using classic eye-splices, like those used at sea.  That might work if you do a reasonably thorough job of the splice.  Harmuth's "Die Armbrust' and one of Richter's books (I think Die Hornbogen Armbrust) have illustrations of the proceedure, by which one essentially makes an oversized continuous loop string and then loop the ends back over themselves to create slip-knots.  Then you have to serve the knots carefully to keep them from slipping any more.  I have done plenty of those strings... they take more time and sometimes you do get a bit of knot-creep, but they're strong and have the right look for medieval bows.  Geezer.

    stuckinthemud1
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2014-02-05
    Age : 50
    Location : south wales valleys

    Re: making my first crossbow string

    Post by stuckinthemud1 on Sat Aug 25, 2018 4:24 pm

    Thanks Geezer, I've spent a while researching and found the illustration you mentioned in Dei Hornbogen Armbrust, and the videos by Jos von Eichsfeld, the one question I can't find an answer to is the string length to lay out - presumably if I lay out the string at the distance of the lath from nock to nock (DNTN)then when I put in the slip-knots it should take the string to more-or-less the correct length (1.5" less than DNTN?) and I can twist in any slack that might remain??
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1060
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: making my first crossbow string

    Post by Geezer on Sun Aug 26, 2018 10:01 am

    Oooh, that's a hard one.  To some extent it varies by the thickness of the string as well as the  string length and size of the eyes.  Generally I'm making 27 inch strings for 'industry standard' aluminum or steel prods (like those made by Garvin the Slow or Darkwood Armory) For those, I make an endless loop string about 1/3 larger than a standard continuous loop string.  To some extent, you can alter the looped-string size by sliding the knots or twisting the string overall when finished.  Beware, over-twisting a string will end up breaking surface-fibers and make the whole thing fail.  So try starting with a 1/3 oversize skein of string that isn't very valuable.  Experimentation will result in something that works, but you are likely to waste a few before you have it down.  Geezer.

    stuckinthemud1
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2014-02-05
    Age : 50
    Location : south wales valleys

    Re: making my first crossbow string

    Post by stuckinthemud1 on Sun Aug 26, 2018 2:04 pm

    1/3 oversize; thanks I would have been woefully under-size, saved me again!! If if ends up slightly over, its no loss as I need a bastard string but if it ends up under then that's a different matter. As an aside, I have found that an over-twisted string unwinds at the end of the stroke, dramatically decreasing string tension and losing a noticeable amount of power.

    Sponsored content

    Re: making my first crossbow string

    Post by Sponsored content


      Current date/time is Fri Sep 21, 2018 3:59 am