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

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+2
ferdinand
coiner10
6 posters

    Angle of prod in stock and prod stiffening.

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    coiner10
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    Angle of prod in stock and prod stiffening. Empty Angle of prod in stock and prod stiffening.

    Post by coiner10 Mon Jun 04, 2012 1:00 pm

    How do you determine the angle at which the prod is into the stock? I'm assuming the draw lenth of the prod determines it, but I want to make sure. Also does the length of the arrow grove plays a part in the angle of the prod?

    Once I find a "easy to find" (I still haven't found one yet Evil or Very Mad) leaf spring I'm going to have to stiffen it. I'm wondering if I could take the smallest leaf spring and bolt it to the back of the prod to make the center wider. Or should I just leave the center wider than the rest of the prod?
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    Post by ferdinand Mon Jun 04, 2012 9:11 pm

    coiner10 wrote: How do you determine the angle at which the prod is into the stock? I'm assuming the draw lenth of the prod determines it, but I want to make sure. Also does the length of the arrow grove plays a part in the angle of the prod?

    Once I find a "easy to find" (I still haven't found one yet Evil or Very Mad) leaf spring I'm going to have to stiffen it. I'm wondering if I could take the smallest leaf spring and bolt it to the back of the prod to make the center wider. Or should I just leave the center wider than the rest of the prod?

    From ur story i make out that u allready have a prod wich u want to stiffen using leafspring?
    What kind of prod do u have right now? Maybe a picture would make it clear.
    Prods are thicker in the middle, that is no problem. Cant help u with the angle, i just made it so that the string doesnt rest to heavily on the tiller.
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    Post by coiner10 Tue Jun 05, 2012 8:33 am

    Well I don't have one yet, but I do know what it looks like. The leaf spring is going to become the prod too.
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    Post by jds6 Wed Jun 06, 2012 9:04 am

    If you look through the forum you will find topics on prod angle. I have done mine two different ways.

    Once you have your prod complete, string the prod. Place your stringed prod against the face of your tiller( stock). Make sure the string rest on top of tiller, and measure down 1/16". This should work.

    Also I have measured down a 1/2" from top of filler, marked my prod, and put a 6 degree angle cut in tiller. This also seemed to work out fine.
    Make your tiller to your parts, not your parts to your tiller! This will save you a lot of grief.

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    Post by sairaj999 Wed Jun 06, 2012 11:20 am

    king
    coiner10 wrote: How do you determine the angle at which the prod is into the stock? I'm assuming the draw lenth of the prod determines it, but I want to make sure. Also does the length of the arrow grove plays a part in the angle of the prod?

    Once I find a "easy to find" (I still haven't found one yet Evil or Very Mad) leaf spring I'm going to have to stiffen it. I'm wondering if I could take the smallest leaf spring and bolt it to the back of the prod to make the center wider. Or should I just leave the center wider than the rest of the prod?
    jocolor ha ha you can get leaf at any scraf store its really cheap Jam
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    Post by ferdinand Wed Jun 06, 2012 2:30 pm

    coiner10 wrote: How do you determine the angle at which the prod is into the stock? I'm assuming the draw lenth of the prod determines it, but I want to make sure. Also does the length of the arrow grove plays a part in the angle of the prod?

    Once I find a "easy to find" (I still haven't found one yet Evil or Very Mad) leaf spring I'm going to have to stiffen it. I'm wondering if I could take the smallest leaf spring and bolt it to the back of the prod to make the center wider. Or should I just leave the center wider than the rest of the prod?

    If u buy a used leafspring from a car u dont have to forge the shape of a prod, its allready bend.
    Also u can make the center of the prod wider to increase drawstrength.
    There are topics enough about prod making.
    Or just buy one from new world arbalest?
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    Post by coiner10 Wed Jun 06, 2012 8:23 pm

    I finally found one. Very Happy It might be too big, but I still have a couple places that will give me one if they get one. I don't want to buy because I'm a poor high school student.. Neutral
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    Post by chaz Thu Jun 07, 2012 2:13 am

    Coiner10.

    Hopefully you have a tool source. You'll need at very minimum a hacksaw and if possible an angle grinder with a thin blade and some eye-protection as you start to shape your prod and some files.You can actually acomplish quite a bit with not a whole lot with a lot of initiative and drive to do so. You are on a learing journey that will sharpen your skills. Best of luck on your project.

    Chaz
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    Post by coiner10 Thu Jun 07, 2012 6:27 am

    I'm going to go to my grandpa's house to visit and he has a shop and once my parents buy a house they'll probably get some basic power tools.
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    Post by chaz Thu Jun 07, 2012 9:39 am

    Perfect

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    Post by Gnome Sat Jun 09, 2012 5:17 am

    Hey Coiner, good luck on the project! Measure twice and cut once and all that. Or, as is my usual practice, measure twice, cut once, swear three times, start measuring again...

    About the leaf spring, if it's used, be very careful! Kinda like buying a used car, could be nicely broken in or could just be broken and you won't know until it fails.

    Regarding the angle of your prod, there are a lot of variables involved since you are making your own prod- how wide your prod is in the center, how much upsweep at the ends, and the distance between the bow and the string when it's strung, mainly. There are different techniques and formulas for figuring all this out ahead of time, available on this forum and elsewhere on the web. Cut your prod socket to your best guess before doing any other work on the tiller, and leave yourself plenty of room for corrections, because you probably won't get it exactly right the first time. I would reccomend you take the direct approach at this point and string your prod and see how it fits. Sounds easy, but it does mean that you have to put priority on two other components along with making the prod- getting or making the string, and choosing a technique for putting the string on the prod before it's mounted to the tiller!

    just my two cents,

    Gnome
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    Post by coiner10 Sun Jun 10, 2012 12:32 pm

    Those two cents were helpful and thanks everyone for the comments.

    I'll be able to start working on the stock and prod very soon so I'll try to get some wip pictures up after that.

    Thanks again for all of your guys help. Very Happy

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