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Violated growth rings

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Tom Dulaney:
Hello hornbowyers:


Are violated growth rings in wooden cores a problem in composite bows, the way they are in self bows? Let's say I had some limbs that needed to be de-crowned because they had an un-even back, would that be a problem? Since the bow will be backed heavily with sinew anyway, should I bother chasing the growth rings down so they're vertical?



Your thoughts/experience?





Thanks.

Tom

EdwardS:
I don't believe the originals had chased rings.  Grooving the back and belly for horn/sinew (a la Korean bows) would violate it anyway (though they used bamboo.)

davidjw:
I wouldn't worry about violating growth rings in a horn bow.  Typically in horn bows the outer growth rings are on the belly side of the bow, just to avoid splinters when bending the wood core to shape.  The inner rings of the tree become the back of the bow and can be violated anywhere they need to be, it's pretty difficult not to.

Bjoern Sofeit:
Growth rings can be violated and will be violated. What you want to look at is the grain that runs along the side. Should be nice and straight. If it runs off wildly, you'll have a broken bow or a super warped piece of junk when the sinew is on.

loon:

--- Quote from: Bjoern Sofeit on June 30, 2017, 01:39:43 pm ---Growth rings can be violated and will be violated. What you want to look at is the grain that runs along the side. Should be nice and straight. If it runs off wildly, you'll have a broken bow or a super warped piece of junk when the sinew is on.

--- End quote ---
so you mean, the grain should all be parallel to the bow, and it shouldn't run off? and it doesn't matter if it runs off in the back or belly?

you're not talking about how the grain looks on the sides of the core, right, but how it looks on the back?

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