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

Latest topics

» Trying to reduce the power stroke in my next project
by octavioaugusto.oliveira Yesterday at 4:15 pm

» The Road so far......
by Onager Lovac Tue Apr 25, 2017 4:07 pm

» Its good to be back!!
by Juan galeano Tue Apr 25, 2017 9:31 am

» The crossbow...What is?!
by octavioaugusto.oliveira Sat Apr 22, 2017 2:07 pm

» Compact repeating compound project
by jocky Sat Apr 22, 2017 10:46 am

» I need your advices on a new crossbow project
by Daniel Levesque Fri Apr 21, 2017 12:58 pm

» Reverse draw "compound" build
by c sitas Wed Apr 19, 2017 9:07 am

» The Arbalist Guild - Around the World
by harry6855 Tue Apr 18, 2017 12:26 pm

» Guidance Designing My First Slinger
by kenh Thu Apr 13, 2017 8:17 pm

» New member
by harry6855 Thu Apr 13, 2017 8:28 am

» Chinese style crossbow trigger 3d modeled with templates.
by Bs1110101 Thu Apr 13, 2017 6:14 am

» Crusader crossbow
by Anatine Duo Wed Apr 12, 2017 5:03 pm

» Berkhamsted Castle and Glasgow Museum wooden prod crossbow
by hullutiedemies Wed Apr 12, 2017 8:52 am

» Hello from Asia
by Daniel Levesque Wed Apr 12, 2017 6:49 am

» Medieval crossbow modeled in Tinkercad, with variant trigger design.
by Bs1110101 Mon Apr 10, 2017 1:42 pm

» New project"s"
by kenh Sun Apr 09, 2017 2:38 pm

» New member here!
by c sitas Thu Apr 06, 2017 7:49 am

» Fixing a bad delflex
by Daniel Levesque Tue Apr 04, 2017 11:13 am

» H L Bailey Plans
by ora8i Sun Apr 02, 2017 1:49 am

» Top of Crossbow (launch?)
by Geezer Thu Mar 30, 2017 9:41 pm

» Finished Crossbow
by SlingerDave Thu Mar 30, 2017 7:47 pm

» Split limb and Draw length
by c sitas Mon Mar 20, 2017 8:25 pm

» Starting a New One
by c sitas Sun Mar 19, 2017 5:24 pm

» Medieval Crossbow Shooting video
by Onager Lovac Thu Mar 16, 2017 3:32 pm

» First submission
by War Song Thu Mar 16, 2017 1:25 pm


    Crossbow Bolt groove design.

    Share

    b33felix
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 2
    Join date : 2014-09-01

    Crossbow Bolt groove design.

    Post by b33felix on Mon Sep 01, 2014 7:26 pm

    Hi guys, im new to arbalist guild! just wanted to introduce myself, i've been watching post for a time, and decided to make my first medieval build (first from several more to come) took some plans from the web but after some chiseling here and there i found that i probably made a huuuuge mistake,  the plans supposed to say thay i should narrow a few inches of the flight riel (if im not mistaken) but not all the way over so i ended up with a few inches where the bolt wouldnt actually touch the wood or riel, neither would the string, , what i did was something like this: 

    http://www.aceros-de-hispania.com/gb/infer.asp?ac=34&trabajo=listar&pa=ballestas-flechas-medievales&sg=ballestas-flechas-medievales

    (actually its not that deep , or that long) Do you suggest to start from scratch? make a steel plate? or leave it like that and it'll be fine.?

    Thanks everyone for making this such a great website. cheers.
    avatar
    Sugarbuzz
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 23
    Join date : 2011-12-27
    Age : 41
    Location : Washington

    Re: Crossbow Bolt groove design.

    Post by Sugarbuzz on Mon Sep 01, 2014 8:39 pm

    Hello and welcome to the guild! I have seen a lot of those kind of crossbows floating around on the web and assumed they were some oddity or mix up between a stone bow/bullet bow and a crossbow. I know most every medieval crossbow I have seen made here has a rail that the string is always in contact with, I would be concerned with the string suffering a lot of shock when is stopped in that empty region and possibly snap? As far as I could see with stone bows they seem to have specialized strings that are heavily reinforced and made very differently. I'm not a pro on those kind of crossbows, my interest has always been with grooves and bolt rests on medieval builds. I personally would make a new stock if it is too extreme but it's possible it might be repaired somehow. Someone here said most mistakes aren't irreparable. Not to be discouraging in any way, don't get me wrong! I have made my share of mistakes and learned a lot over the last few years and crossbows I have made. As regards the narrowing of the flight rail I would think they might mean narrowing the sides? I always do that for the section between the nut and about 2 inches behind where the prod is bound in. It may be mostly aesthetic but I'm sure it serves a purpose, perhaps to reduce drag on the top rail. I recall it being said that you don't want a string that "flies" as it is detrimental. I made one crossbow that came very close to barely contacting the rail, but even that was only for a very short distance as the prod was slightly angled. Posting an image of the stock in question might help people determine the best course of action too. I might be wrong about those kinds of crossbows with the cut out table section, I am sure someone will correct me on that, I'm curious to know!
    avatar
    Gnome
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 399
    Join date : 2011-10-16
    Age : 53
    Location : Capitol Area Maryland

    Re: Crossbow Bolt groove design.

    Post by Gnome on Wed Sep 03, 2014 9:38 am

    Welcome, Felix. Check out Hotspur's avatar photo, is that what you mean?
    Gnome

    b33felix
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 2
    Join date : 2014-09-01

    Re: Crossbow Bolt groove design.

    Post by b33felix on Fri Sep 05, 2014 5:32 am

    Yes gnome, just like that! do you think its fixable/usable? and thanks sugarbuzz for the reply!
    avatar
    Gnome
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 399
    Join date : 2011-10-16
    Age : 53
    Location : Capitol Area Maryland

    Re: Crossbow Bolt groove design.

    Post by Gnome on Fri Sep 05, 2014 9:01 am

    I've never made that type of deck myself, but I think Hotspur has gotten good use out of that weapon. You might want to message him and ask. What's critical, I think, Is that the area around the brace height is flat and level and in contact with the string. That is where the most stress on the string takes place, when the string is set into sudden motion then needs to suddenly stop it's motion, and contact with the tiller helps soak up some of that energy. If you have that, I think you can make it work.
    Gnome
    avatar
    Hotspur
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 150
    Join date : 2012-06-28
    Location : British Columbia, Canada

    Re: Crossbow Bolt groove design.

    Post by Hotspur on Sun Sep 07, 2014 12:53 am

    Hi b33felix,

    As Gnome noted i made the dip in the table as well.  The idea is that there is less string/bolt friction.  I haven't noticed any problem with flight.

    8fingers
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 184
    Join date : 2011-04-06
    Location : Chetwynd, BC, Canada

    Re: Crossbow Bolt groove design.

    Post by 8fingers on Sun Sep 28, 2014 9:41 pm

    If your current groove doesn't work, I'm sure you could cut off the offending area and add a nicely contrasting piece of wood. Cutting a new groove, and re-contouring will give you a chance to show off your new skills.
       From museum pieces I have seen, a very dark wood overlaying the entire top of the stock would reduce glare and might make for a few more hits.

    Sponsored content

    Re: Crossbow Bolt groove design.

    Post by Sponsored content


      Current date/time is Thu Apr 27, 2017 3:06 am