Factors of Adhesion for the Big Three

[nw-mailing-list at nwhs.org]

My reference gave the J's weight on drivers as 494,000, and boiler pressure  
as 300 psi.
Also; have to question the starting FA of 3.44 for the Y6b.  Usually  
associate lower FA value
with high speed passenger locomotives, such as Milwaukee Road's  
semi-streamlined 4-4-2 
of the mid 1930's.  Would expect heavy freight locomotives, such  as the Y, 
to have FA of
4.00 or higher.  
 
Jerome Crosson    
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