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Del's MR Copy

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JW_Halverson:
Ewww!  Gross!   That's like looking at photos of tumor surgery!

Del the cat:

--- Quote from: Ian. on January 21, 2012, 05:11:48 pm ---Nicely done Del, I have to say I never go to the trouble to fill a knot just leave it a little bigger. But then I haven't used Englsih yew yet.

--- End quote ---
Yeah, if a knot is sound wood, that's what I'd do.
With this one, I just couldn't figure out where the other end of the knot was, which is why I was cautious.
As I worked away reducing the side of the stave it exposed the rot, it was pretty soft, black and manky.
This shows how it looked just before it was exposed... it looks fine!
Just goes to show, you can't always be sure what lies beneath the surface. If you can see just one end of a knot it begs the question where is the other end!

You can sort of see how the knot ended suddenly and the wood had grown over it with a nice bulge and continuous sapwood.
Del

JW_Halverson:

--- Quote from: Del the cat on January 21, 2012, 05:57:49 pm ---If you can see just one end of a knot it begs the question where is the other end!
Del

--- End quote ---

There is a lotta wisdom in that statement. 

CraigMBeckett:
Hi Del,

Great post and thanks for the additional info, according to the MR archaeologists your bow is "course grained" having 40 or less rings per inch, while the original 80A608 was "fine grained" and therefore had more than 60 RPI. I wonder what difference that really makes?

Regards

Craig.

Del the cat:
It would be interesting to cut two strips from that Yew off cut, one from the tight grain section and one from the coarse and do comparitive tests.
However I expect it would be difficult to cut and test them accurately without machining facilities, even then it would prob' be foolhardy to draw conclusions.
The one good thing about the idea is that we would know the wood was same genetically, which would be one less variable.
A test like that (repeated with enough different samples) would be a good way to determine any corellation between rpi and stiffness/density etc.
Hmm, Maybe I'll have a go if I get the time, a simple deflection test might suffice... simple is good.
Del
PS, I'm still toying with adding a discreet arrow plate (I won't put a leather grip on it), maybe when I do that, I'll measure up the other limb.
In WoW some of the dimensions are a tad difficult to interpret, or they have two dimensions and an asterisk, for which you can't then find the explanation  E.G Two different length figures for the same bow... overall and ntn?
Also the dimensions at the 'nock', do they mean the nock groove? I daresay the info is in there somewhere, but theres such a huge amount to plough through and with a finished bow you can't measure at the nock groove once it's covered with horn
(I'm not complaining you understand, it's a great source of info)

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