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

Latest topics

» Medieval Crossbow Replica
by bartek Wed Dec 07, 2016 1:24 pm

» Prod construction
by actionbow Wed Dec 07, 2016 1:10 pm

» Hello from MD
by bigcountry_ky Mon Dec 05, 2016 7:40 am

» How to make a miniature medieval crossbow
by El Zurdo Sun Dec 04, 2016 3:31 am

» A real miniature crossbow
by El Zurdo Wed Nov 30, 2016 11:19 am

» Intesting Mechanical Bow can pre-cocking and locking
by stm2010 Sun Nov 27, 2016 10:29 pm

» Invitation
by Vee Sat Nov 26, 2016 11:42 am

» Chu Ko Nu (Zhu ge nu) chinese repeating crossbow making process from china
by El Zurdo Fri Nov 25, 2016 2:51 pm

» Miniature medieval crossbow crafts
by El Zurdo Fri Nov 25, 2016 9:10 am

» Why use a Crossbow?
by Xamllew Mon Nov 21, 2016 8:49 pm

» Minimum bolt weight steel prod
by Armymedic Fri Nov 18, 2016 5:01 pm

» where or how to ask a question
by WINCAR Fri Nov 18, 2016 1:51 pm

» roller nut difficulties
by Gnome Fri Nov 18, 2016 9:13 am

» The serious build
by hullutiedemies Tue Oct 25, 2016 3:35 am

» Hello from arkansas
by Onager Lovac Tue Oct 18, 2016 8:06 pm

» Wham O Powermaster
by Onager Lovac Tue Oct 18, 2016 8:05 pm

» Folding Stock Bullet-bow Project
by Xamllew Wed Oct 12, 2016 6:23 pm

» New member here!
by Xamllew Tue Oct 11, 2016 6:36 am

» Finnish Crossbow Forum
by hullutiedemies Fri Oct 07, 2016 6:54 am

» Ordo pro balistari
by John Edgerton Mon Sep 26, 2016 1:24 pm

» CNC Improved Chinese Trigger Xbow- Gnome style
by jaeger22 Tue Sep 20, 2016 1:12 pm

» xbow build.. trying to finish..where does the time go
by Onager Lovac Wed Sep 14, 2016 3:30 pm

» An afternoon at the range
by Gnome Sun Sep 04, 2016 10:00 am

» I am back with new project
by stm2010 Tue Aug 30, 2016 2:35 am

» European medieval an renaissance archery contests and target
by Lightly Sun Aug 28, 2016 4:08 pm


    new to this site

    Share

    thornwarbler
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 8
    Join date : 2012-03-16
    Location : Northumberland England

    new to this site

    Post by thornwarbler on Sat Mar 17, 2012 12:30 pm

    Hello everyone i live in a small village in Northumberland in the UK i have had an unhealthy interest in all things crossbow since i was a lad i own an old Barnett Wildcat from the 70s and i have a homemade with a shaped leaf spring as a power source it shoots reasonably well but i still have lots to learn.Thorn'

    basileus
    Crossbow Building Wiki
    Founder & Curator
    Crossbow Building WikiFounder & Curator

    Posts : 86
    Join date : 2010-06-18

    Re: new to this site

    Post by basileus on Sat Mar 17, 2012 2:35 pm

    Hi Thom,

    You might enjoy this article if you want to tune your leaf spring crossbow to the max. These too might be of some interest to you:

    • Plan for a simple leaf spring prod
    • Making a steel prod from a leaf spring

    Basileus

    stoneagebowyer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 490
    Join date : 2011-01-12

    Re: new to this site

    Post by stoneagebowyer on Sat Mar 17, 2012 6:47 pm

    Welcome aboard, Thorn.

    Dane

    Michael
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 52
    Join date : 2010-09-29
    Age : 65
    Location : Oak Creek. Wisconsin

    new to this site; lef spring for prod?!..

    Post by Michael on Sat Mar 17, 2012 9:16 pm

    Hey Thorn Welcome to the site Now if you like crossbows you found the home / house of crossbows Modern > Medieval. Making a Prod (bow) from an old auto leaf spring works? I made one many years ago when I was still a kid?! Be careful as this way is very dangerous. It can and will ruin your whole day. Have funfore you are with a group of great guys all willing to help. Take care now. Mike

    basileus
    Crossbow Building Wiki
    Founder & Curator
    Crossbow Building WikiFounder & Curator

    Posts : 86
    Join date : 2010-06-18

    Re: new to this site

    Post by basileus on Sun Mar 18, 2012 2:40 am

    Michael wrote:Hey Thorn Welcome to the site Now if you like crossbows you found the home / house of crossbows Modern > Medieval. Making a Prod (bow) from an old auto leaf spring works? I made one many years ago when I was still a kid?! Be careful as this way is very dangerous. It can and will ruin your whole day. Have funfore you are with a group of great guys all willing to help. Take care now. Mike

    I used leaf springs for crossbow prods exclusively until I started experimenting with wooden bowmaking a few years back. The leaf spring leaves I use are new, not used. Now, I would argue that a properly heat-treated and designed steel prod is not any more dangerous than any other prod that stores the equal amounts of energy. I think the reason for the bad reputation of leaf spring prods is twofold:

    • They're easy to make without knowing much/anything about bowmaking and due to this they've been almost always designed badly
    • They store large amount of energy

    Bad design combined with high energy storage is a good recipe for a disaster.

    Now, there are several things to remember when making a safe and efficient steel prods:

    • Ensure there are no weak points (e.g. the hole in the middle, look here for ideas)
    • The width taper is proper, so that all parts of the bow bear equal load (look here)
    • The steel is heat-treated so that the prod bends before breaking (look here)
    • Draw length is increased slowly to see if the prod gains "set" (=bends without returning to it's original form)
    • The areas around the width tapering cuts are ground or filed cold, so that the softened areas are removed

    That said, used leaf springs are usually rusty to the extent they have small pits all over their surface. These obviously reduce the integrity of the bow somewhat. However, unlike with wooden bows, this is not critical. It will hold together just fine.

    That said, you experiment with any bows and prods at your own risk Smile.

    Basileus

    thornwarbler
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 8
    Join date : 2012-03-16
    Location : Northumberland England

    thanks guys

    Post by thornwarbler on Sun Mar 18, 2012 7:34 am

    i've learned more in your welcome posts than i ever knew thanks alot. Thorn

    basileus
    Crossbow Building Wiki
    Founder & Curator
    Crossbow Building WikiFounder & Curator

    Posts : 86
    Join date : 2010-06-18

    Re: new to this site

    Post by basileus on Sun Mar 18, 2012 12:30 pm

    thornwarbler wrote:i've learned more in your welcome posts than i ever knew thanks alot. Thorn

    Glad to be of assistance!

    Sponsored content

    Re: new to this site

    Post by Sponsored content Today at 8:04 pm


      Current date/time is Fri Dec 09, 2016 8:04 pm