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  #21  
Old 07-15-2010, 02:46 AM
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Thomas Erickson Thomas Erickson is offline
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Ah, I was neglecting that.

So how wide and/or angled the grain gets toward the edge helps determine how much recurve makes for a good balance of support and vibration, while moving toward the center of the plate the arching height and thickness, assuming the grain is more vertical there, help to determine the longitudinal stiffness and actual acoustic properties, right?

So it would seems to me like a top with even, vertical grain all the way across isn't, as a rule going to sound better, but that it is going to be simpler to interpret and make a good top from. Conversely, a top with other sorts of grain orientation has the potential to sound just as good, perhaps even better, but is going to take more consideration (and perhaps luck?) in order to get the best performance from it. And then there are the health issues to consider.
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Old 07-15-2010, 12:50 PM
Ken McKay Ken McKay is offline
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Sounds like you understand Thomas.
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  #23  
Old 07-15-2010, 08:05 PM
Arnold Schnitzer Arnold Schnitzer is offline
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Picture looking down on a tree trunk, where you can clearly see the growth ring circles. Now, slice down through the trunk, cutting it into quarters. Then, make thin pie slices out of each quarter. Take two adjacent ones and true up the wider sides of the pie slices. Glue them together and you have a "quarter-sawn" bass back or top. Cutting the tree trunk in any other fashion will result in a combination of slab, quartered, and rift-sawn stock. Bass bar stock is cut in a similar manner to top and back wood, then trued up to be rectangular, rather than pie-slice shaped. Is there somebody out ther, more computer savvy than me, who can diagram this?
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  #24  
Old 07-15-2010, 08:09 PM
Arnold Schnitzer Arnold Schnitzer is offline
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Quote:
Originally Posted by wayne holmes View Post
This is not about recurve.
Wayne, are you the subject matter police? The subject got on to quartered vs. slab grain around the edges, and that's where the recurve happens. Where's the problem?
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  #25  
Old 07-15-2010, 10:02 PM
Craig Regan Craig Regan is offline
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Quote:
Originally Posted by Arnold Schnitzer View Post
Picture looking down on a tree trunk, where you can clearly see the growth ring circles. Now, slice down through the trunk, cutting it into quarters. Then, make thin pie slices out of each quarter. Take two adjacent ones and true up the wider sides of the pie slices. Glue them together and you have a "quarter-sawn" bass back or top. Cutting the tree trunk in any other fashion will result in a combination of slab, quartered, and rift-sawn stock. Bass bar stock is cut in a similar manner to top and back wood, then trued up to be rectangular, rather than pie-slice shaped. Is there somebody out ther, more computer savvy than me, who can diagram this?
Here is my feeble attempt at being computer savvy:
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