David Love wrote: > One interesting thing that I'm beginning to notice is that there is an > interaction between grain angle, assembly stiffness and hammer tolerance. > For example, I've built boards of varying stiffness in terms of rib scales > altering the grain angle (from 50 to 60 degrees--bass cutoffs are standard) > and have noticed that the boards with higher grain angles seem to be less > hammer tolerant no matter what the stiffness factor in the ribs. That's > interesting to me, if true. It is indeed. >My current formulas have backed off on the grain angle > changes somewhat (though they are still increased from an often seen 45 > degrees but not as much as 60 degrees on anything under 7') and kept the rib > scales still in the light-mid to midrange for low tension scales like > Steinway. While that hasn't put me in the realm of Premium Blue or stock > Abel hammers it has allowed me to prepare hammers with a somewhat more > aggressive attack without any problems. Interesting. I've done something similar with stiffer rib scales, even with high grain angles. Hmmmm, more factors. Thanks. This appears to be explorable evidence. Ron N
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