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    My crossbow project

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    ZigiMan
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    My crossbow project

    Post by ZigiMan on Sat Dec 15, 2012 12:46 pm

    First topic message reminder :

    Hi,

    I can say that this is the second crossbow I am building. (the first one was 20 years ago when I was a young boy.)
    This is beginning of my project. I want to share it with you all and also to get your opinions and advices.
    I'm building my crossbow from scratch using leaf spring as prod.
    There are some contemplations about how to start and what to do.
    In the next post I will send some pictures and details.


    ZigiMan


    Last edited by ZigiMan on Fri Dec 21, 2012 3:01 am; edited 4 times in total
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    kenh
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    Re: My crossbow project

    Post by kenh on Thu Apr 04, 2013 7:44 pm

    Has to do with the amount of potential energy from the cocked prod which is transformed into kinetic energy in the bolt as the crossbow is fired. If the bolt is too light, too much energy goes into the prod, not the bolt, and the prod can be damaged by the 'overflow'. If the bolt is too heavy it simply goes slower than optimum.


    Last edited by kenh on Fri Apr 05, 2013 5:46 am; edited 1 time in total
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    Re: My crossbow project

    Post by stoneagebowyer on Fri Apr 05, 2013 4:18 am

    Cheers Dane Very Happy Tell you the truth, I never knew Knish before... It seems that there are Jewish dishes that are not so common and well known in Israel and the Knish is one of them. It looks delicious! Well, I learn new things almost everyday Smile[/quote]

    The knish seems to have traveled and evolved from Western to Eastern Europe and then across to the US in the early part of the 20th century with various Jewish populations moving around, and is very much (I think), a New York thing. I grew up with many Jewish friends in Los Angeles, but had never heard of the Knish until fairly recently on a trip to Manhattan. My wife grew up enjoying them, and she is Puerto Rican. So go figure Smile
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    kenh
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    Re: My crossbow project

    Post by kenh on Fri Apr 05, 2013 5:58 am

    The knish is a dish of Eastern European origin - Poland, Hungary, the Ukraine, Belarus, Romania, Bulgaria, etc. which was adopted by the Jewish diaspora up into the 1940s. It was brought to America in the late 1890s early 1900s by Eastern European immigrants (not necessarily Jewish). 'Knish' is a Yiddish word derived from the Russo/Ukrainian word Книш (knyush).

    ...things you learn as a gourmet Personal Chef!
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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Mon Apr 08, 2013 2:31 pm

    It's seems that you both are the woman's dream of how a man should be - one that know how to build and use weapons and also can cook!
    Never thought I will be discussing food in this forum... Smile
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    kenh
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    Re: My crossbow project

    Post by kenh on Mon Apr 08, 2013 6:15 pm

    Wait till you see my recipe for Lamb Kebab al Quarrel
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    stoneagebowyer
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    Re: My crossbow project

    Post by stoneagebowyer on Tue Apr 09, 2013 2:52 pm

    Zigi, being able to cook is a great skill for any guy. Women love men who can find their way around the kitchen. What made me start to learn was that a girlfriend was moving into my apartment and I realized that I couldn't afford to eat out every night, and my own diet or junk food and so on would not impress her. Smile
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    ferdinand
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    Re: My crossbow project

    Post by ferdinand on Tue Apr 09, 2013 9:28 pm

    Moms cooking got me hooked! I love to cook! I think if u are a creative person like anyone of us here it is just another challenge! Creating beautifull things like crossbows is probably just one of many things we do!?
    If i speak for myself:
    I have a old 73' ford taunus i love to ride and tinker on.
    I ride a bike, kawasaki drifter(cant afford a vintageindian!!)
    I do some painting sometimes.
    Just build a forge and am discovering this art!
    And it goes on and on haha
    Dont think i am that different from all of u, right?!
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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Thu Apr 11, 2013 7:30 am

    Ken, that seems like a true crossbow hunter dish! Wink

    Well Dane, it's part of the holy trinity for woman: chef at home, warrior outside and lover in the bedroom!

    I couldn't agree with you more Ferdinand, it all about creating... the urge to understand and make things with your hands, whether it's crossbow or food... Zen and the art of building a crossbow Smile
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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Thu Apr 11, 2013 11:00 am

    Built new bases for the string jig since the old ones (on the left) weren't firm enough, causing the poles to bend when there is too much tension.



    Had a hard time making the new thick string. Took me time to realize that few factors were influencing the length of my string: Stretching the threads too much shorten the length by 1cm, and the loop of each nock short the string by 1/2cm and finally, the bend of the loop while resting above the nock made it short by another 1/2cm. Making long story short, the string was too short.



    Only in the third string I took all of the above into consideration and make a proper size string. This one is three times thicker then the one that was broke.



    Filled the edges of the nocks a little bit more. In order to secure the week points of the nocks, preventing them from breaking, I followed Mac's advice and added leather strips.



    Tested the shoot with what I had as a heavy projectile (in order not to dry-fire) - a long aluminum round bar, and it worked pretty good.
    Now it's time to build a bolt.

    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Wed Apr 17, 2013 3:11 pm

    Forged my first bodkin:





    Tested the bolt (without fletching yet). Worked very nice. The shot was taken from a distance of 10 meter (11 yard).



    Took a thin plastic sheet I found at a stationery shop.



    Cut the fletchings:



    After making a slot I glued them with 5 minutes glue.

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    Re: My crossbow project

    Post by kenh on Wed Apr 17, 2013 7:44 pm

    I'll take a dozen bodkins, please... and a side of fries.

    Nice idea that plastic film. Not traditional, but certainly functional. I guess plastic film could be considered a descendant of parchment....
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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Thu Apr 18, 2013 2:57 pm

    kenh wrote:I'll take a dozen bodkins, please... and a side of fries.

    Nice
    idea that plastic film. Not traditional, but certainly functional. I
    guess plastic film could be considered a descendant of parchment....

    How would you like them, please? Medium or well done? Very Happy

    Not traditional indeed... I needed something to serve as fletching until I'll find some feathers...

    Yes, it could be considered a descendant of parchment... The black "sheet" of the family Laughing
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    Re: My crossbow project

    Post by jds6 on Thu Apr 18, 2013 8:47 pm

    Greetings
    Nice bodkin! I don't know about you, but I found that when I made my first bodkin, it looked a heck of a lot easier for the guys on You Tube!!!!

    jds6
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    Re: My crossbow project

    Post by ferdinand on Thu Apr 18, 2013 9:03 pm

    Making them consistent in length and weight is my challenge! Once u have made a few u will get rappidly better at it! I love making bodkins!! looking good, keep going!! Ur shaft could be a bit thicker i think. If u heat the bodkin and insert the shaft shortly but firm it wil burn to a tight fit.
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    Re: My crossbow project

    Post by kenh on Fri Apr 19, 2013 6:15 am

    Zigiman, I'll take those medium-well. Rolling Eyes

    Why not get a thin board or two from Ebay and make wooden fletching? You can find lots of interesting and not expensive 1/16" thin boards for under $10 US -- three 5" x 18" x 1/16" Beech boards for $4 Buy-It-Now, for example. That would make a huge number of fletches!! Can't find someone who'll ship to Israel? Drop ship to me and I'll send it on to you. We can trade for bodkins Laughing
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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Mon Apr 22, 2013 1:28 am

    jds6 wrote:Nice bodkin! I don't know about you, but I found that when I made my
    first bodkin, it looked a heck of a lot easier for the guys on You
    Tube!!!!
    Thanks jds6! Yeh, it sure looked easy on Youtube, but I wonder how did their first bodkin looked like...

    ferdinand wrote:Making them consistent in length and weight is my challenge! Once u have
    made a few u will get rappidly better at it! I love making bodkins!!
    looking good, keep going!! Ur shaft could be a bit thicker i think. If u
    heat the bodkin and insert the shaft shortly but firm it wil burn to a
    tight fit.

    Thank you too ferdinand! From my impression of your work, you will get them perfectly well. Even the one you posted before look really nice! I think I made the bodkin bigger then the shaft... I'll remember that advice if it will be hard to insert the shaft.

    kenh wrote:Zigiman, I'll take those medium-well. Rolling Eyes

    Why
    not get a thin board or two from Ebay and make wooden fletching? You
    can find lots of interesting and not expensive 1/16" thin boards for
    under $10 US -- three 5" x 18" x 1/16" Beech boards for $4 Buy-It-Now,
    for example. That would make a huge number of fletches!! Can't find
    someone who'll ship to Israel? Drop ship to me and I'll send it on to
    you. We can trade for bodkins Laughing

    I really appreciate your offer for help! Very Happy I don't think I'll have problems finding here traditional alternatives for the fletching... What I used now it's just what first came to my mind.
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    Re: My crossbow project

    Post by ZigiMan on Tue Apr 23, 2013 2:36 am

    Made the stirrup: Took 2.5 cm (31/32 inch) steel bended and welded it to pyramid pieces.

    .

    Then welded the center piece that holds the prod.



    And assembled it with the prod.



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    ZigiMan
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    Re: My crossbow project

    Post by ZigiMan on Thu May 09, 2013 3:01 am

    Made some modification: Replaced the metal side plates with wood.





    Build the clip for the bolt. Took a blade of a hacksaw:



    Filled and bend it to the right shape;



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    Re: My crossbow project

    Post by kenh on Thu May 09, 2013 1:02 pm

    Looking good Zigiman. I like the wooden lock plates rather than metal; you can change them out for some fancy grained or exotic wood later, if you choose.
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    Re: My crossbow project

    Post by ferdinand on Fri May 10, 2013 11:05 am

    Looking good!! Almost there!
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    Re: My crossbow project

    Post by ZigiMan on Sat May 18, 2013 2:33 pm

    Thanks guys!
    I also like the wood plates, Ken. Much better. I am planning to change the whole tiller with more beautiful wood (and to make more accurate and cleaner work).
    Yes, almost there Ferdinand, but it seems that always I'll find something to change or to improve...
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    Re: My crossbow project

    Post by zhangyimou on Mon May 20, 2013 5:04 am

    nice, cannot wait to see the finished piece!!! Very Happy
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    Re: My crossbow project

    Post by kenh on Mon May 20, 2013 5:50 am

    Zigiman said "it seems that always I'll find something to change or to improve...it seems that always I'll find something to change or to improve...

    Ah yes. That is the curse of being a builder. We always see our own mistakes as well as ways we could have done it better. Others just look at what we do with open-mouthed admiration!

    Rather than completely re-make the tiller down the road, think about covering it with thin plates of prettier wood. Sort of like inlay, but without actually inletting anything. You can get lots of pretty exotic woods off Ebay. For example there currently are two 1/16" x 3" x 22" African Wenge boards being offered for $7, as well as several other species, if you search on "1/16 lumber". That would be enough to nearly cover your existing prod if thoughtfully cut.
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    Re: My crossbow project

    Post by ZigiMan on Thu May 23, 2013 1:08 am

    zhangyimou wrote:nice, cannot wait to see the finished piece!!! Very Happy
    Thanks zhangyimou ! Well, the pictures below are almost the finished piece, but I still have some improvements to make.

    kenh wrote:Ah yes. That is the curse of being a builder. We always see our own
    mistakes as well as ways we could have done it better. Others just look
    at what we do with open-mouthed admiration
    You're right ken... Too bad the side effect is a short satisfaction from our work Rolling Eyes (that's by me at least).

    Rather than completely re-make the tiller down the road, think about covering it with thin plates of prettier wood.
    That's my thoughts also. Or maybe metal thin plates. But I still have the urge to build a stock from a better wood like Walnut or Oak. Even though the filed and painted tiller from Pine looks pretty nice.

    Even tough my plane for a better stock, I filed and painted the current one:



    The assembled crossbow:


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    Re: My crossbow project

    Post by chaz on Thu May 23, 2013 5:11 am

    Zigi,

    Very Nice indeed, in all aspects.

    Chaz

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