CLASS A QUESTION

[NW Mailing List]

Steven,
There was documentation put out to sheath all  A  (plus other  classes of 
engines) smokeboxes but I believe they just never got time  to do it. The steam 
engines were running out of time and many of  the A's were retired before the 
class Y engines. Most if not all of  the Y6's got the smoke box covered, only 
one for sure Y6a 2159 and possibly  2170 were covered and all but two Y6b's 
were sheathed. If steam would of stayed  around for another 5 or 10 years all the 
above classes would have gotten a  sheathed smokebox.
Anytime you hold heat in you increase the engines efficiencies  that was why 
the fire box was covered when built. The Western   Maryland, to mention one, 
sheath the smoke box and firebox on most of their  steam engines.
Jim Williams



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