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Tenn Classic
GraemeK:
Hi Pappy
I have found that timber can dry to a stable MC and exhibit a certain strength but after a few years especially if stored in hot conditions the lignin's in the cells age and cause an increase in strength. So it is an ageing rarther than drying thing and I have had as much as a 10% increase. Does seem to vary quite a bit with different timbers.
Graeme
Pappy:
Thanks,I got it worked down and gave me a chance to tweek the tiller a little so it worked out
fine.Good to see you back on the board hope you are doing well. :)
Pappy
DCM:
I read a post by Tim Baker on paleoplanet that said "Every 10-degrees temperature chance alters wood strength by 2% to 5%."
I replied:
80 degrees vs. 70 degrees 3.5% change per 10 degrees
60# * 103.5% = 62.1#
90 degrees vs. 30 degrees (typical crafting vs. hunting temp change for me)
60# * 121% = 72.6#
Throw in a some moisture content changes and you see a wood bow really does have a mind of it's own. I've had whitewood bows behave remarkably different from one time to the next.
Ryano:
Pappy, I havent checked it on my scale yet. In fact, I havent touched it since I got back. Im running around like a chicken with his head cut off getting ready for our shoot now like you guys were a couple weeks ago! :o I'll let you know where it comes in at on my scale, but yours said 53#@28" and it felt heavier than that to me....
Pappy:
Ya David I have had Hickory do that after it had been put up for a while just haven't had Osage change that much.It was close to 5 years ago since I built this one so I may have just stopped tillering it and called it that.I can't remember I have slept since then. ;D
Pappy
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