Slingbow ideas?

Discussion in 'General Slingshot Discussions' started by PDK73, Feb 22, 2012.

  1. PDK73

    PDK73 New Member

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    <img src="http://i43.servimg.com/u/f43/17/23/13/33/102_3110.jpg" border="0" alt=""><img src="http://i43.servimg.com/u/f43/17/23/13/33/102_3028.jpg" border="0" alt="">Hi guys, not sure if this is the correct section to post this in but im looking for some opinions on a project I've had on the back burner. First off, let me say that I realize that a rubber powered bow isn't really practical (especially for a guy who owns so many conventional bows). I've wanted one since I saw Joerg's and so I'm making one for the cool factor. It uses the same basic design as my aluminum starship. My goal is to try and maximise both band life and have full lenght of draw. I put some tube on the bow part and it seemed to be stretched near its happy limit. Included are two possible configurations, with and without pulleys (the pulleys reduce the percentage of elongation but add complexity). Another option would be to just make the bow a bit longer so as not to stress the rubber too much. What I'm wondering is what is more detrimental to the rubber: extreme stretch, pulleys, or contacting stops/or wisker biscuit upon release? Ideas? Also, I'm to cheap to buy a whisker biscuit. I'll either make a tooth brush type, rubber tube type or toilet brush type. How have these stood up for the guys who have made them? Thanks. Sorry for the long post.
     
  2. Broken Images

    Broken Images New Member

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    If memory serves me correctly Joergs bow didn't have the pulleys and he was using the bands from a spear gun. My thought would be to make the bow longer.
     

  3. MARTINO

    MARTINO New Member

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    Can you share the source of your black tubing????? Also what kinda speed do you get measured on a chronograph???<br>thanks in advance <br>martino
     
  4. PDK73

    PDK73 New Member

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    The tubing is black Thera tube. I bought it on sale at Princess Auto (that's basically the Canadian version of Harbour Freight). It is available on eBay and from physio retailers (an Internet search will provide options). I don't have a crony, but I wouldn't expect arrow speeds above 150 fps. The tubing is durable but slower than flat bands.