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Intermediate level build/help-along - Laburnum Pyramid - UPDATED WITH PART 3!

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bownarra:
I mean they can be slow and handshocky. Narrow thick limbs give the wood the return speed it needs. Thinner wider limbs don't stress the wood appropriately. It took me a while to figure it out, 3rd bow from labernum was the charm!

NicAzana:
Surely that depends on other variables than thickness and width!

A long bow will have thicker and narrower limbs for the same strain, and, conversely, a short bow need wider and thinner limbs to experience the same strain as a longer bow.

Same goes for reflex/recurving - if the stave has a lot of reflex (like this one), it must bend more to be braced, therefore requiring thinner, wider limbs to be equally strained, compared to a straight or deflexed bow.

I guess for laburnum (or yew), with its low bend resistance and high elasticity, the real answer is that it should be thicker and narrower than an otherwise identical bow of a stiffer wood? In this case, I have four inches of reflex, a pyramid taper, and will have very slim/light and stiff tips. It might be a little long, but I can shorten it a bit if it turned out to be understrained later.

Does other people also think that this is way overbuilt?

simk:
really nice piece of wood - that's gonna be a screamer for sure (-S

I have two laburnum bows started, now sitting in the unfinished bows corner - not the easiest pieces and tricky to remove rings also - they just overstressed my patience. hope one day they will shoot...

cheers

NicAzana:
I sure hope so Simon! We'll see, I have yet to f*** it up, I think  )-w(

I too hate chasing rings - but once this was dry, it was actually surprisingly easy to carefully cut it free with my dull-ish drawknife. I think you can treat it like a lot of folks describe chasing Osage rings - as long as the rings aren't too thin.

simk:
sure wish you luck  :)
I have hard times chasing the rings here despite thick rings....there's almost no early wood on mine and the color differences between the rings are marginal - almost invisible. also I hardly feel the early wood between the rings with my drawknife nor really see it with my eyes. to me it feels much harder to chase than any wood I did before. with osage I can do it almost blind...we will see....
cheers

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