Can Someone Please Explain Log Rule Scales ?

[DR Buck]

 :P

What "log rule" is most often used by the custom sawyer?  And if a 'board foot' is a standard volume of measurement, why so much difference between the scales.   ???

I cut two 16 ft  maple logs yesterday. By the "Doyle" scale there was 74 bdft.  By the "International 1/4 Inch" scale the same logs had 130 bdft.  When I finished cutting I had 169 bdft of lumber.  

Looks to me if I'm going to estimate a job, I should use the International 1/4 Inch scale.  Is this correct?   ???

By the way, the maple logs were my first boards.

[Jeff]

Maybe this will help. Its a link from one of my other websites.
http://www.timberbuyer.net/topics/logrules.htm

[DR Buck]

 
Thanks Jeff,

The explanation from the linked web page clears things up.  I thought it was some kind of "New Math".

[woodbeard]

What size log does the Doyle scale accurately represent? In other words, when does it stop underestimating, and start overestimating?

[beenthere]

Around 30 small end diam. inside bark.

Try it in the calculator for a 16' log.