Main Discussion Area > English Warbow
80" White Elm Warbow Build-along
adb:
Thanks for posting your pulley system. Instead of the 3 separate pulleys, could you use a double wheel side-by-side pulley on the bottom?
Cameroo:
Adam - I initially had a bolt running through both of the bottom pulleys together, essentially making it a double pulley, but it kept wanting to twist the eye-bolt, making the rope bind, and pulling everything all cock-eyed. I think it was because there were still two separate clevises attaching the pulleys to the eye bolt. This is just what seemed to work best with what I had kicking around, but I think if a guy used a proper double pulley with only one clevis, that should work too.
I got curious about the physics so I did a little google search and found this. My setup resembles the third illustration (but upside-down), so basically I am pulling with 1/3 of the force, but pulling 3 times as far.
I couldn't resist doing a bit more work on it tonight. It is now sitting at about 115 lbs @ just over 30". There was surprisingly little wood removed between this picture and my previous update. Basically just tweaked the tiller a bit and gained another 2.5" draw length. But for that little bit of wood removal, the tiller certainly became much more circular. Just goes to show how easy it would be to screw things up when you are near final tiller.
I think it's about time to do some finish sanding and call it a bow! I'm still debating whether I want to try full horn nocks, or just do some sort of overlay. I change my mind every time I think about it :)
adb:
Outstanding tiller, Cam! I'd call it done on the tiller, and shoot it in now. I can't wait to see it.
WillS:
That looks perfect. Amazing job!
Del the cat:
Yeah, that looks great.
Like you say, when you are getting close, it doesn't take much wood removal. Just sneezing on the bow and you can get another inch of draw :laugh:
Del
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