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    Orcbow's Oversized Pistol Crossbow

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    Orcbow
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    Orcbow's Oversized Pistol Crossbow

    Post by Orcbow on Sat Oct 02, 2010 12:37 pm



    This is a crossbow that I made about one year ago. If you have seen it on a different website, sorry to repeat it here. Since I found this website, I wanted to share it here with other crossbow builders.

    This is my third crossbow. I am a furniture maker by trade, so my crossbows are made almost completely from wood, fiber, and glue. There are a few metal parts like screws, pins, and springs.

    I made this crossbow's bow first. It is all hickory, and features a stacked lamination design. There are three separate "layers" each one longer than the previous one, like leaf springs under a car. The three parts are not glued into a single bow, but can slide past each other a tiny bit as the bow bends.

    Just for fun I made the longest bow from two strips of hickory and joined them at the tip with a another piece which had the notch for the bow string. This gives a striking look of a "split limb" like on a modern compound bow.



    Finally, I designed the bow to have a hole cut through the center of it to eliminate the string drag which seems to steal much power from the traditional crossbow design. So the string passes from one tip of the bow to the other in a straight line, just a hair over the top edge of the crossbow stock.







    The crossbow stock is made of quarter-sawn white oak. There are two brackets in front which are quarter sawn beech that support the bow. The side plates are hickory. Everything is finished with my homemade black shellac.





    The roller nut is made from dogwood. In my opinion, this is the best wood that is available to me locally for this purpose. I harvest, dry, and saw this myself. The trees are at best 6 inches in diameter, but this is plenty to yield a 1 1/4" thick board.

    I use a 1/4" brass pin on which the roller nut spins. This is a deviation from tradition. For me it was just more simple to make. This design works fine for me, and on this crossbow and my first crossbow which is much stronger, there has been no problems after nearly two years of use.





    This is the trigger. It is quarter-sawn hard maple. It pivots on a 3/16" steel pin. A small barrel spring is used to provide positive pressure on the trigger, making it lock in place automatically. My design could be better here, as the length of this lever is so short that it takes a strong finger to fire the bolt.



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    You Tube Video for this crossbow

    Post by Orcbow on Sat Oct 02, 2010 1:02 pm

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    Re: Orcbow's Oversized Pistol Crossbow

    Post by kiltedcelt on Sat Oct 02, 2010 8:54 pm

    Orcbow,

    I recognize your pistol crossbow from a posting over on one of the stickbow forums. Nice to see you over here on "the Guild." I look forward to seeing some new crossbow projects from you, and a hearty welcome to The Arbalist Guild!
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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Orcbow on Sun Oct 03, 2010 1:48 pm

    Thank you for the welcome!

    I have another crossbow in the works, a real "orc" style crossbow that will make this one look like a toy. Hope to finish up the bow for it this fall.
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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Paulius on Mon Oct 04, 2010 12:03 pm

    Nice piece of work, Orcbow, simple but good looking design Cool.

    I'd like to ask if it is accurate (because it seems that this crossbow doesn't have any groove or rest for arrow), and what is the draw weight of this bow.
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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Orcbow on Mon Oct 04, 2010 12:37 pm

    Thank you for the compliment!

    Yes it is accurate, as well as my shooting goes. It depends much on the bolt as well. No arrow groove was an oversight.

    So if the bolt fits nicely in the "fingers" of the roller nut then the bolt will fly true.

    The draw weight I measured at 45#.


    Last edited by Orcbow on Mon Oct 04, 2010 5:21 pm; edited 1 time in total (Reason for editing : Updated information)
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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Ivo on Mon Oct 04, 2010 6:56 pm

    Nice build, sure looks like a fun way to getaway from the ordinary.

    I have a few questions and perhaps a few suggestions too.

    The back of the stock is extended and it seems almost like a slot for a pin retained removable shoulder stock. Did i guess correct? Smile

    As for suggestions...

    String slaps against the back of the wooden bow mount. It would be much better if you modified the area where the string stops by adding some thick rubber pads...it would would extend the life of the string and make the crossbow much quiter while at it.

    The arrow groove would be nice, but you can play it out with a brush type arrow rest by cleverly positioning two slightly modified toothbrush heads right above and below the arrow.



    Good to have you with us OrcBow, BTW that big one you mentioned...I'm sure we all would love to see it. Wink

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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Orcbow on Mon Oct 04, 2010 7:56 pm

    Thank you Ivo for Welcoming me to this forum. You did guess correct about the purpose of the long side plates. I intended to have a removable shoulder stock sorta like some assault rifle. I made one but I didn't like it so I used the pin to mount a shoulder strap instead (not pictured).

    I like your suggestion on the brush guides. Since the bolt pokes out through the hole it would be simple enough to mount them out in front.

    Also padding the bow brackets against the string slap is a great idea. It will be interesting to "hear" the difference! It's not very quiet as is.

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    Re: Orcbow's Oversized Pistol Crossbow

    Post by 8fingers on Sun Apr 17, 2011 12:28 pm

    If you extended the trigger so you could pull it with all your fingers, you might have more manageable trigger pull without having to rebuild your stock. Nice crossbow I am going to try a copy of that prod as soon as I can.
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    Re: Orcbow's Oversized Pistol Crossbow

    Post by Orcbow on Sun Apr 17, 2011 12:48 pm

    Yes, that is an excellent idea 8fingers! Thank you for the suggestion.

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    Re: Orcbow's Oversized Pistol Crossbow

    Post by 8fingers on Sun Apr 17, 2011 1:31 pm

    I just remembered a tip from a carriage wheel course I took way back when. To bend the rims they would boil the wood in a long piece of steel pipe capped and propped over the fire like a mortar. To keep the wood from splintering when they bent it they added liquid fabric softener to the water.

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    Re: Orcbow's Oversized Pistol Crossbow

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