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

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3 posters

    Two Questions

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    kenh
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    Post by kenh Tue Mar 12, 2013 10:36 am

    1. Any reason why, if I use a a wippe as a cocking aid, that I cannot use a heavy cord loop at the nose of the tiller rather than a shackle as per Payne-Gallwey?

    2. I see two ways to mount a prod --
    A. slot on top of the tiller with some sort of tension/holding screw; and
    B. Classic slot in the end of the tiller with the prod held in by irons or binding. Advantages/disadvantages of the "top slot" vs traditional "end slot"?
    septua
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    Post by septua Tue Mar 12, 2013 4:47 pm

    kenh


    1) If the cord itself is strong enough and can swivel it
    still needs an anchor point that doesn’t abrade it. A cord anchored at 2 points
    “loop” is a must. I use a wippe and a
    front swiveling metal loop. The wippe is useful if you are doing a lot of
    shooting. When I latch the string the metal loop swings up to about 30° above
    horizontal. Design the wippe so it latches the string to a constant lateral
    position.


    2a) Advantages: ?


    Disadvantages: Non-Traditional


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    Post by kenh Tue Mar 12, 2013 7:35 pm

    Problem I'm having with the loop is that I can't find a shackle with a wide enough throat -- I'd have to cut away a huge width of the tiller to fit it. I have no metalworking abilities or equipment to make a sufficiently strong metal loop; so I'm stuck with 'off the shelf' bits & pieces. I can drill a hole transversely through the tiller, re-inforce the hole with metal tubing, and use a cord loop - something like parachord in strength.

    I'm not terribly worried about tradition for the prod slot. The whole build is a melange of historic and modern. The prod is "Chinese" loose laminates -- of heavy fiberglass, the action is a pin-lock but with a deldrin pin, the tiller is in the shape of a 16th century harquebus stock.
    septua
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    Post by septua Tue Mar 12, 2013 9:43 pm

    kenh
    The sleeve with cord idea is workable. The outcome can be elegant looking. You may need to put a wide hook, or even a pair of hooks at the front of the wippe so the cord will clear the tiller when it swings up.
    sep
    .


    Last edited by SEPTUA on Tue Mar 12, 2013 9:44 pm; edited 1 time in total (Reason for editing : added name)
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    Post by hullutiedemies Wed Mar 13, 2013 5:42 am

    kenh wrote:1. Any reason why, if I use a a wippe as a cocking aid, that I cannot use a heavy cord loop at the nose of the tiller rather than a shackle as per Payne-Gallwey?

    That smaller hemp loop behind the yute stirrup is for whippe
    Two Questions Kuva0324_137


    This bow was originally intented to be used with a whippe, and was succesfully tested with one. But it soon became obvious that for a small 100# bow bare fingers and stirrup is more practical so I have not bothered to document the whippe.
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    Post by kenh Wed Mar 13, 2013 6:44 am

    Thanx guys.

    Nerd - I'm sure your wippe was paleo-legal as well, right? Forked branches and lashings rather than a pivot bolt...
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    Post by hullutiedemies Fri Mar 15, 2013 10:07 am

    Yep . Pivot axle was just bundle of flax thread spanned accross wide deep fork.

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