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

Latest topics

» Beware of Alchem
by Archer46176 Mon Aug 21, 2017 3:33 pm

» How to measure and cut leather for prod
by Celtic Archer Sun Aug 20, 2017 5:56 pm

» Crossbow with built in lever?
by John Edgerton Thu Aug 17, 2017 12:38 pm

» Of Bows and Torsion Engines
by JacobL Mon Aug 14, 2017 12:03 pm

» Early Lever and pin Crossbow
by topfmine Mon Aug 14, 2017 8:56 am

» Crusader crossbow
by topfmine Mon Aug 14, 2017 8:53 am

» First Efforts
by rickraedeke Tue Aug 08, 2017 5:25 am

» aluminum prod
by Phil Abrahams Fri Aug 04, 2017 8:38 am

» First whitetail buck taken with medieval crossbow
by Phil Abrahams Fri Aug 04, 2017 3:38 am

» Airsoft Crossbow
by JacobL Wed Aug 02, 2017 9:11 pm

» Questions about steel prod specs
by JacobL Mon Jul 31, 2017 8:25 pm

» Faking a medieval composite crossbow prod.
by JacobL Mon Jul 31, 2017 8:13 pm

» Airsoft Bow
by JacobL Sun Jul 30, 2017 1:56 pm

» Hello All!
by JacobL Sun Jul 30, 2017 12:54 pm

» Padre Island Bow
by Geezer Wed Jul 26, 2017 12:14 pm

» Blocked pictures by Photobucket
by Crossbowmen Mon Jul 24, 2017 1:33 pm

» Geezer website?
by Geezer Fri Jul 21, 2017 3:01 pm

» Could I get advise on order of operations?
by Bs1110101 Wed Jul 19, 2017 4:02 am

» Renaissance Sporting crossbow
by chaz Mon Jul 10, 2017 12:22 am

» Welcome! Welcome! Welcome!
by Agniznag Sat Jul 08, 2017 12:26 pm

» The Arbalist Guild - Around the World
by Agniznag Sat Jul 08, 2017 11:56 am

» opinions please
by Geezer Thu Jul 06, 2017 10:19 pm

» Hello all!
by Tarzan65 Thu Jul 06, 2017 10:54 am

» Yet another one
by Daniel Levesque Sun Jul 02, 2017 9:37 am

» Renaissance peep sight
by kenh Fri Jun 30, 2017 4:48 am


    Complex crossbow triggers by Da Vinci

    Share

    HeroSK
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 63
    Join date : 2013-11-27
    Age : 31
    Location : Turkiye

    Complex crossbow triggers by Da Vinci

    Post by HeroSK on Sat Jan 03, 2015 1:21 am

    Hi all,

    I just found this from Codex Madrid dated to 1493.

    avatar
    mac
    Master Weaponsmith
    Master Weaponsmith

    Posts : 560
    Join date : 2010-12-23
    Location : Near Philly USA

    Re: Complex crossbow triggers by Da Vinci

    Post by mac on Sat Jan 03, 2015 10:08 am

    Now I am going to say something heretical. 

    The lock on the right will not work as drawn.  There are two problems.  The first is the angle of the locking surface of lever 2 (counting from the nut).  It needs to be less than 90 degrees to the line drawn from the pivot to the face.  This face needs to be a sort of "ramp" so that the motion of lever 1 will cause lever 2 to rotate.  This is a small thing and can be easily adjusted.

    The second problem is more difficult to fix.  The left end of lever 2 must lift the hook in the middle of lever 3.  If we follow the arcs that Leonardo has conveniently provided, we see that it will jam under the hook before it can travel far enough to allow lever 1 to clear the working face of lever 2. 

    If I remember correctly, the text says something about lever 2 "breaking", so I assume the Leonardo realized that there was a problem, but had not gotten around to drawing a fix for it.

    Mac

    Rizzar
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 192
    Join date : 2012-08-11
    Location : Germany

    Re: Complex crossbow triggers by Da Vinci

    Post by Rizzar on Sat Jan 03, 2015 12:22 pm

    Hey guys!

    Some time ago I´ve heard about Da Vinci´s drawings.
    It was stated that he was building errors into them to prevent stealing his ideas.

    Old copyright protection^^
    Could be in this case, too.

    Rizz

    Sponsored content

    Re: Complex crossbow triggers by Da Vinci

    Post by Sponsored content


      Current date/time is Thu Aug 24, 2017 4:43 am