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Elasticity versus poundage

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BowEd:
Yes the sheer forces going on need to be accounted for although if constructed properly not a problem,but proper construction won't override poor quality.
Yes your right about maples' diffuse porus qualities making it a good choice for glueing.Using ring porus with large early growth would not be my choice especially flat sawn.
I've been getting away with using hickory on mine.Very fine ringed.Early wood like dots.Flat sawn.Time will tell if I get away with it.So far it has.

mikekeswick:
Willie - you are dead right it is a sheering force that the core feels, as it is on the neutral plane (give or take). If the sinew is too thin then the core starts to feel tension and will fail everytime....don't ask me how I know this!
Maple is indeed chosen for it diffuse porous properties, ring porous woods are likely to fail along the earlywood layers, or at the very least each earlywood layer is a 'built in' weakness. Maple will of course also handle being steam bent into a pretty extreme shape and glues very well. A good core wood will have all these properties.
People have used ash (and other ring porous woods) for cores on less stressed bow designs, however if you are going to use a ring porous wood then it is a very good idea to use it 1/4 sawn therefore 'homogenizing' it compared to flatsawn. The only issue with doing this is that wood is stiffer laterally with a flat sawn piece compared to 1/4 sawn. Flat sawn will make the bow quite a bit easier to stabilize - this is a major factor and becomes apparent when you first brace a bow.

willie:

--- Quote ---Making another composite bow here.Going with less thickness of a core by 1/16" and more composites.
--- End quote ---

just curious why you are changing the proportions on this bow.?  Are the working limbs bending to a tighter radius than the earlier bow, or are you shoooting for a lesser stringfollow? or better performance?.......

Redhand:
Those are some excellent example Beadman.  I really like your bows. I need to attempt one of these.

BowEd:
I did'nt give strict heed to a few of the rules making a bow like this with materials and design,but it has worked.Like with any bow time and usage is the ultimate truth extractor....Ha Ha Ha.
I think your bows are a work of art to be truthful.I need to sometime try an all horn or an all antler bow too.All these type bows seem to be the meaning of patience in primitive archery.

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