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

Latest topics

» Nut from a pool que ball?
by drawknife Today at 5:29 am

» my composite crossbow lath project
by stuckinthemud1 Fri Jun 15, 2018 6:07 am

» Trouble with my Gafa
by drawknife Fri Jun 15, 2018 2:56 am

» Do all triggers Have claws - what types and claw or no claw
by globalmark Thu Jun 14, 2018 12:19 am

» For Sale: Masai Crossbow
by TonyU Mon Jun 11, 2018 1:15 pm

» Medieval composite bows
by juanjo Fri Jun 08, 2018 5:10 am

» yew and sinew prod help needed
by stuckinthemud1 Thu Jun 07, 2018 1:34 am

» Small gothic crossbow (with wooden lever)
by OrienM Fri Jun 01, 2018 10:35 am

» Binding on the stirrup
by Geezer Sat May 26, 2018 7:26 am

» horn inlay and veneer
by OrienM Thu May 24, 2018 8:44 pm

» Presentation
by c sitas Wed May 23, 2018 4:31 pm

» My latest crossbow
by drawknife Tue May 22, 2018 3:13 pm

» The Arbalist Guild - Around the World
by stuckinthemud1 Sun May 20, 2018 5:32 am

» angles and rivets
by Geezer Fri May 18, 2018 1:16 pm

» morticed nut blocks
by Dark Factor Wed May 16, 2018 12:02 pm

» Crossbow triggers
by Croftage Mon May 14, 2018 1:41 pm

» Cocking lever
by c sitas Fri May 11, 2018 8:09 am

» Late roman crossbow
by Dark Factor Wed May 09, 2018 10:27 am

» Powermaster Madness
by Archer46176 Sun May 06, 2018 8:08 pm

» Fast loading crossbow
by septua Mon Apr 23, 2018 9:22 am

» lashing a glass prod in raw hide?
by kenh Sun Apr 22, 2018 7:00 am

» Balestra Veloce / Leonardo DaVinci
by msalazar2310 Fri Apr 20, 2018 10:37 am

» Goats Foot Lever
by Geezer Wed Apr 18, 2018 12:42 pm

» Hickory and Ipe 180lb flatbow
by actionbow Mon Apr 16, 2018 1:56 pm

» goat foot questions.
by Geezer Sat Apr 14, 2018 10:26 am


    Compound system Vs power strike

    Share
    avatar
    Kali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 31
    Join date : 2010-01-29

    Compound system Vs power strike

    Post by Kali on Sat Feb 06, 2010 12:31 am

    Hi there,
    Planning the limbs shape/ length/ strength for my reverse limb crossbow project, this morning i've made several silly measurements using a toy crossbow (reverse limb configuration, with 45% angle between limbs):
    I measured the differences between limbs' tops with the crossbow cooked and not-cooked
    1. classical setup: the rope was secured at the both ends of the limbs without any pulley:
    the limbs' variation of 40cm for a draw length of 19 cm - so, as expected, the report is about 1/1 (1 cm draw length = 1 cm of each limb movement)
    2. "semi-compound" setup: two pulleys were attached to the limbs tops and the wire was one piece encircling the pulleys:
    limbs' variation of 30 cm for a draw length of 30 cm - again, as expected, the report is 1/2 (1 cm draw length = 1/2 cm of each limb movement)
    3. compound setup: the rope coming from a pulley was attached at the end of the opposite limb:
    limbs' variation of 16 cm for a draw length of 32 cm - the report is about 1/4 (1 cm draw length = 1/4 cm of each limb movement) - I don't know why, but i was always convinced the the compound report should be 1/3 ... maybe because I was seeing just 3 wires Smile)

      Current date/time is Sun Jun 17, 2018 11:54 pm