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crossbow design (Read 1197 times)
nakram
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crossbow design
Dec 12th, 2005 at 7:47pm
 
hi i thought instead of using flexible limbs on a crossbow use a stock with a solid bow but have a system of pulleys and a spring to create the force,
somthing like this


     o--------////////-------o
      \             ll            /
        \           ll          /   
          \         ll        /   
            \       ll      /    
              \     ll     /    
                \   ll  /      
                    ll    
                    ll
                    ll
                    ll
                    ll          

the onley bit im stuck on is the firing mecanism i cant think how to make a simple one ???

rich
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ben_banned
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Re: crossbow design
Reply #1 - Dec 12th, 2005 at 9:11pm
 
hmmm maybe you  should draw this
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Joseph Curwen
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Re: crossbow design
Reply #2 - Dec 14th, 2005 at 4:13am
 
The release mechanism is the big problem with crossbow, cause tou have to relaese high energy with a minimum effort.

If your crossbow is low powered, you could just make a slot in the stock where the string will rest when the crossbow is cocked, and place a rod through the stock to push up the string and relaese (use in chineese crossbow).

If your crossbow deliver a lot of energy, use a nut. Google "nut crossbow medival", i am sure you will usefull information.

I am also thinking about pulleys for both crossbow and "experimental" slingshots. Got some ideas, but no time to experiment for the moment.

Keep in touch.

Regards

Joseph



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