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

» [solved]Skane/Lillohus crossbow thread
by stuckinthemud1 Sat Aug 10, 2024 3:16 pm

» Colletiere a Charavines continuing experiment
by stuckinthemud1 Fri Aug 02, 2024 7:13 am

» What you building?
by hullutiedemies Tue Jul 09, 2024 12:39 am

» 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

» 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

» 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


5 posters

    Fiberglass prod draw length

    woodsmith
    woodsmith
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows


    Posts : 16
    Join date : 2013-11-07
    Age : 69
    Location : Kitchener, ON, Canada

    Fiberglass prod draw length Empty Fiberglass prod draw length

    Post by woodsmith Sun Dec 29, 2013 11:58 am

    Does anyone know the draw lengths for the Taiwanese fiberglass prods, the 80lb and the 150lb ?
    I'm starting a build based on a PVC prod but would like to change it out later for a stronger prod.
    Thanks
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer


    Posts : 1194
    Join date : 2010-01-12
    Age : 76
    Location : Austin, Texas, USA

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by Geezer Sun Dec 29, 2013 5:07 pm

    If we're on the same page, the Chinese 150 lb. fiberglass prods (often closer to 125) are essentially knock-offs of the old Barnett Panther and later "San Marino' crossbows.  approx 28 inches from end to end.  They'll tolerate @ 8 inches of draw from 3.5 in. brace... maybe 9 inches, but I never went for more than 8.  Does anybody else have more info?  Geezer.
    avatar
    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?


    Posts : 151
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by phuphuphnik Sun Dec 29, 2013 5:12 pm

    I don't know about the 150s but I just bought 3 of the 80s. I'm measuring 6" with a 17" string. Thae might go further, but I can't pull it back any more. I got them from the crossbow store's ebay page for just shy of $10 each.  I'll gladly let you buy one off of me, as they won't do for my stonebow project. All that said, I'll be getting one of the 150# or the 120# and I'll let you know what that draw is in a week. I'm hoping they are around 11"
    cheers!
    chriso

    EDIT Geezer beat me to it with the 150s. Glad I didn't order one yet. Might need to redesign the stock...
    woodsmith
    woodsmith
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows


    Posts : 16
    Join date : 2013-11-07
    Age : 69
    Location : Kitchener, ON, Canada

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by woodsmith Mon Dec 30, 2013 5:11 pm

    Thanks Geezer and Chriso, I'm glad I asked at this stage. The PVC prod I made is drawing 11" on top of a 4" brace. I have some decisions to make before I go any further.
    avatar
    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!


    Posts : 379
    Join date : 2011-04-07

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by jeep Tue Dec 31, 2013 3:31 am

    About the Taiwanese fibreglass bow 150#. (Referring geezer measurements: brass 8,89cm draw20,32cm) I am a regular user of those for various experiences.
    For my first bullet crossbow (Midleton inspiration)
    I used split limb 150# fibreglass
    brass 10cm  draw 22cm
    For the slur-bow (fibreglass)
    brass 10cm  draw19cm
    XIX th cent hunting 2x 150 fibreglass
    brasse 10cm  draw 23,5 cm

    For the bullet crossbow Richard Midleton point out that he don't succeed to use fibreglass limb because of the poor torsion resistance  (bullet need extra angle). This is the reason why I used split limb (centre shot, no angle)and there he work pretty well .
    I most of the time use the fibreglass over draw. I found a lot of tolerance but by precaution I all-way wrap them with  tape string or leaser. When is going to give up it produce crack before.
    my bullet crossbow
    Fiberglass prod draw length Bullet14
    avatar
    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!


    Posts : 379
    Join date : 2011-04-07

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by jeep Tue Dec 31, 2013 3:31 am

    Fiberglass prod draw length Bullet15
    avatar
    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!


    Posts : 379
    Join date : 2011-04-07

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by jeep Tue Dec 31, 2013 3:45 am

    This kind of bullet crossbow with 150# bow is not a toy!!! it is incredibly powerful and potentially dangerous if not well cantered and balanced. This is a weapon....
    Some time the bow brake. Look the  last development  post  XIX th cent crossbow
    Gnome
    Gnome
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!


    Posts : 451
    Join date : 2011-10-16
    Age : 60
    Location : North Georgia

    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by Gnome Tue Dec 31, 2013 11:42 am

    For the full size 150lb prod, you should be able to draw 10 inches from a 3.5 inch brace height with no problem. I have one build that draws 12 inches from the same brace height. Now that I've explored the limits of the prod I can tell you I probably won't ever do that again. Too scary, even with a very strudy wrapping around it. I draw it with a cocking rope, and even then, the last inch or two I can feel a lot more resistance. So I would say 10 inches is a safe maximum draw for the designed brace height of 3.5".
    I'd also reccomend testing each individual prod- they may look identical, but there are definitely some variances in their construction. I had one crack on me while stringing it on my press, it wasn't flexed more than a few inches.
    Gnome

    Sponsored content


    Fiberglass prod draw length Empty Re: Fiberglass prod draw length

    Post by Sponsored content


      Current date/time is Sat Oct 05, 2024 1:23 pm