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

Latest topics

» Salut from France
by c sitas Yesterday at 1:15 pm

» Starting a New One
by c sitas Sat Jan 14, 2017 8:18 am

» DURAL ALLOY PROD BLANK--RECURVE DESIGN
by Andy. Thu Jan 12, 2017 2:06 pm

» A trip to Geezer's
by c sitas Thu Jan 12, 2017 10:05 am

» Need some advices for prod material
by c sitas Thu Jan 12, 2017 8:39 am

» RDT experiments
by FrenckBrambo Wed Jan 11, 2017 3:48 pm

» How to make a miniature medieval crossbow
by El Zurdo Wed Jan 11, 2017 2:03 pm

» A real miniature crossbow
by El Zurdo Wed Jan 11, 2017 1:11 pm

» Stringing question
by Daniel Levesque Tue Jan 10, 2017 2:12 pm

» Newbe From Hartford, Ct.
by kenh Tue Jan 10, 2017 5:52 am

» Epoxy brands and sorts
by FrenckBrambo Mon Jan 09, 2017 5:40 am

» Forging some bodkins
by SlingerDave Wed Jan 04, 2017 6:40 am

» Split limb and Draw length
by FrenckBrambo Tue Jan 03, 2017 10:16 am

» GLOSSARY OF TERMS
by kenh Tue Jan 03, 2017 7:23 am

» Steel Prod and Trigger Mech FS/T
by OrienM Mon Jan 02, 2017 9:55 pm

» Custom Cobra Crossbow pistol
by Vampyr Engel Fri Dec 30, 2016 11:04 pm

» Howdy from Texas!
by SlingerDave Fri Dec 30, 2016 4:18 pm

» Prod construction
by OrienM Thu Dec 29, 2016 9:17 am

» How do you string your crossbow
by SlingerDave Thu Dec 29, 2016 9:12 am

» Hi from Newbie
by kenh Thu Dec 22, 2016 5:36 pm

» Welcome! Welcome! Welcome!
by Daniel Levesque Mon Dec 19, 2016 8:39 am

» Hello from MD
by Gnome Thu Dec 15, 2016 4:41 am

» Medieval Crossbow Replica
by kenh Tue Dec 13, 2016 6:29 pm

» Intesting Mechanical Bow can pre-cocking and locking
by stm2010 Sun Nov 27, 2016 10:29 pm

» Invitation
by Vee Sat Nov 26, 2016 11:42 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 : 62
    Join date : 2013-11-27
    Age : 30
    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.


    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 Today at 3:46 am


      Current date/time is Mon Jan 16, 2017 3:46 am