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250 pounder attempt
RyanY:
Yeah yeah adb.
Thanks for the advice Steve. I don't think I'm over straining myself but I do think it will be good to work at a lower weight for form and keep working on strength with this current bow. I promise I won't push myself to the point of injury. I'm not trying to draw this bow all the way. Just drawing it where I can without hurting myself while still working on strength. Essentially working out with this bow. How did you work up to heavier draw weights?
I love you guys. ;D
Yewboy:
--- Quote from: ryoon4690 on February 10, 2010, 12:46:25 am ---Yeah yeah adb.
Thanks for the advice Steve. I don't think I'm over straining myself but I do think it will be good to work at a lower weight for form and keep working on strength with this current bow. I promise I won't push myself to the point of injury. I'm not trying to draw this bow all the way. Just drawing it where I can without hurting myself while still working on strength. Essentially working out with this bow. How did you work up to heavier draw weights?
I love you guys. ;D
--- End quote ---
Thats exactly it Ryoon, work on a lighter weight bow untill you have got the technique, then its just a case of repeatedly heavier bows, shooting each one untill you can shoot it with relative ease and with the correct technique, then move up the weight, increments of 5lb can be massive once you get over 100#.
Hope this is helpful to you.
Steve
Rod:
You will notice that Steve is not humping up his front shoulder.
This is what it should look like when you are in command of the bow and not struggling to support the weight.
I remember running into Mark at Ryton and having a conversation about that 200lb bow.
I definitely got the impression that it is not something that even he would care to make a habit of doing.
Rod.
rudderbows:
Well , round one on the Big Bow. I took a video of this and I hope I can get it on you tube soon. My computer is wierd so I may have to send the the Chip to my friend and let him put it on you tube for us..
Anyways, round one was easy. I used the most stable platform we have available here, just simple bamboo backed hickory. It is a full 80" in length and pulls a steady 225 @34" using a boat crank. It bounces up to 230 at 35 ,but, the scale is jumpy so I cannot really rely on it. It was steady at 225@34. It is massive in the hand and is about 1 1'2" wide at mid section tapering to 7/8" wide at the tips. Its fairly thick. Feels more like a baseball bat than a bow. I cant imagine how it would feel to shoot the thing!
What I learned was some good stuff. The fibers stretch out allot on these Big bows and accounts for allot more draw weight drop than on more normal weights during tillering. What I mean is that on a typical wood bow draw weight is reduced by reducing thickness as well as fiber stretching. Fiber stretching can account for I am guessing anywhere from 5 to 15% of the total weight loss. BUT, on these Big bows the fiber stretching accounts for allot more. When this bow was first drawn back it went to 255 at 34". Than on the second and third draw it dropped all on its own to 225. This means that if we want to achieve a full steady 250 pounds we have to start out on a stave that is at least another 1/8" to 1/4" thicker than this one OR just switch to Ipe as a belly core and try that. When we glued up the original staves for this I glued two with bamboo backed hickory and two with bamboo backed Ipe all 80" in length. this one is just slightly above 1 1/4" thick in the center and about a hair or two less than an inch at the tips.
Measurements are deceptive though because each piece of wood has its own density.
Off to another bow stave soon. As soon as I can get my computer to cooperate with you tube I will get it posted so you guys can see the scale and set up.
By the way: I would really like to extend a serious thanks to you guys for helping Ryan with advice. he is a motivated , good college boy studying medicine no less. He volunteered for this because he has a mind to achieve things others cannot do and is studying a field that will help the world. hats off to RYAN! ;D.
adb:
Jim,
Thanks for the update. I very much look forward to seeing some pictures or video. This is very interesting.
How much set has the bow taken? Did you break one along the way, or did the first one work out?
I'm also very interested in seeing your tiller tree set up. It must be massive.
I'm still not sure what the point of all this is... building a bow nobody can shoot... but it's still fascinating to push the limits, and you're certainly doing that!!
Also, I'd encourage you to continue to support Ryan, but in a realistic way, which won't lead him to hurting himself. I'd hate to see a young fella full of pi$$ & vinegar doing himself lasting harm.
Cheers, Adam.
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