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» swiss national museum crossbow LM-6010
by stuckinthemud1 Fri Nov 08, 2019 4:29 pm

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» How To Make a Roller Nut?
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» Roller Nut Size
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» anyone know anything about this one - updated with new image
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» Compound twinbow pistol (posts vs pulleys)
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» Laminating crossbow limbs
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» Info required for old laminated limbs
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» Goats Foot Lever
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» Jig for grooving bolts for wood fletching
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» Cranequin drawings
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» Drilling out the trigger grove?
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» finally started my first composite bow
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» Faux ivory
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» Fish skin cover on early hornbow
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» what is nordic/swedish/northern style
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» crossbow 17136, Royal Armoury Collection, Sweden
by stuckinthemud1 Sat Sep 07, 2019 1:26 pm

» notch lock trigger mechanism
by banuvatt Sat Sep 07, 2019 12:55 pm

» how made homemade (reverse) crossbow ?
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» Metal clamps for bastard string
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» Goats foot leaver design
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» mounting sideplates
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    Knottelarmbrüste or other wooden crossbows

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    Post by stuckinthemud1 on Fri Aug 09, 2019 2:11 am

    OK, so I am in need of a new project (in an effort to avoid building a composite bow- I am an excellent procrastinator) and would like to continue learning as much as I can about early wooden crossbows.  Just this week I stumbled over the term knottelarmbruste along with an entry that states most of the 'normal' bows of the 'country districts' were simple, cheap, and of yew (De Re Militari ).  There is also the likelihood that the Berkhamstead bow was sinewed and it seems reasonable that a goodly proportion of these yew bows would also have been sinewed.  I know of only 4 wooden bows - the Glasgow, Berkhamstead and Alcazar crossbows, four if you include the Colletiere a Charavines bow, is anyone able to point me in the direction of any other examples?
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    Post by OrienM on Sat Aug 10, 2019 10:19 am

    There's the Skane, or Lillohus castle bow:
    Knottelarmbrüste or other wooden crossbows 16d30e4294b37dc101d7c5b9dc87a65a

    Late 19th cent. Norwegian bow, used for killing whales:
    Knottelarmbrüste or other wooden crossbows Attachment

    I suspect the Berkhamstead bow might have been sinew-backed; I'm pretty confident the others were not. They are in decent condition, so if they were backed originally I would expect some remnant of the backing to still be visible.
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    Post by stuckinthemud1 on Sat Aug 10, 2019 2:29 pm

    Thanks Orien, I'd forgotten the Lillohus bow, I'd love to build one of those with a yew prod to the dimensions given. My limited experience with yew suggests the power achieved in some reconstructions might be far too low.

    If the bows still have sapwood I feel they were not sinewed but my theory is that if they are only heartwood then they must have been backed.
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    Post by stuckinthemud1 on Sat Aug 10, 2019 2:56 pm

    Another I forgot,  the  Livrustkammaren in Stockholm, Sweden , a full on wood and sinew gothic crossbow with painted birchbark finish. Its the last image on the page.

    http://www.vikingsword.com/vb/showthread.php?t=7516&page=5&pp=30
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    Post by OrienM on Sat Aug 10, 2019 6:04 pm

    stuckinthemud1 wrote:Another I forgot,  the  Livrustkammaren in Stockholm, Sweden , a full on wood and sinew gothic crossbow with painted birchbark finish. Its the last image on the page.

    http://www.vikingsword.com/vb/showthread.php?t=7516&page=5&pp=30
     
    My favorite wood/sinew prod! I posted a pic of this one recently on the 'Yew Composite Prod, help needed' thread. I think it's a particularly nice example of a wooden composite prod, and in near-shootable condition, too. That vikingsword.com thread is a gold mine of great crossbow pics... Very Happy
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    Post by banuvatt on Sat Aug 10, 2019 9:34 pm

    Knottelarmbrüste or other wooden crossbows Skane-11
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    Post by stuckinthemud1 on Sun Aug 11, 2019 7:30 am

    Hey Banuvatt,
    That drawing is so cool, just one small detail, if you angle the release peg a few degrees to align with the arc the tickler moves through, the release is much smoother.
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    Post by OrienM on Sun Aug 11, 2019 8:50 am

    I made a tiny "skane" crossbow awhile back, with a little sinew-backed ash prod. It pulls about 50#, and is lots of fun to shoot. Agreed about the peg; it should be perpendicular to the tickler, not to the face of the tiller.

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    Post by banuvatt on Sun Aug 11, 2019 8:19 pm

    I am trying to build a crossbow for my friend but it's stock it's more contemporary shaped like a rifle I thought about either doing a roller nut or a modified version of the skane lock's trigger mechanism. 
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    Post by stuckinthemud1 on Mon Aug 12, 2019 12:42 am

    No reason that wouldnt work very nicely, but if you produce a drawing with the tickler at the bottom of its travel you will see why the pin needs to be angled slightly
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    Post by banuvatt on Mon Aug 12, 2019 9:01 am

    Is it true that a roller nut is more efficient because it always maintains contact with the butt of the bolt, while a skane lock some of it's energy is wasted slamming the end of the bolt?
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    Post by Geezer on Mon Aug 12, 2019 10:14 am

    In a word, yes, assuming the nut doesn't weigh too much and rolls easily.  Geezer.
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    Post by banuvatt on Mon Aug 12, 2019 10:23 am

    The bow I was going to use is rather light 32-36 lbs. Originally it was around 50 lbs but I had to remove weight because it was too stiff where the limbs were and was only bending in the center. For the nut I was going to use 1" delrin rod or a hardwood dowel if I couldn't get access to delrin.
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    Post by banuvatt on Mon Aug 12, 2019 11:59 am

    This is a crossbow from Tod's workshop.
     Knottelarmbrüste or other wooden crossbows 12th_13thC_crossbow_1_grande.
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    Post by stuckinthemud1 on Mon Aug 12, 2019 2:34 pm

    He did another version of that one with self nocks not horn that looks a lot better. I think he said it pulls 150lb
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    Post by banuvatt on Mon Aug 12, 2019 2:47 pm

    Can you find a picture?
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    Post by stuckinthemud1 on Mon Aug 12, 2019 4:01 pm

    Yes, but, I am not happy with the shape of the tiller as a 12th century design, perhaps others with more experience will correct me, but the only manuscript I can find with this shape stock is dated 1440, the 13th century manuscripts shown throughout the Viking Sword pages show a slender and heavily rounded over tiller shape   http://www.vikingsword.com/vb/showthread.php?t=7516&page=4&pp=30



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