Union Pacific Big Boy in 3/4 Inch Scale

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Pontiacguy1
Posts: 754
Joined: Thu Apr 26, 2012 10:15 am
Location: Tennessee, USA

Re: Union Pacific Big Boy in 3/4 Inch Scale

Post by Pontiacguy1 » Sat Jan 13, 2018 2:41 pm

Maybe some were coal and some had been converted to oil fired?
Winter vs. Summer, dunno. Maybe air density?

Rwilliams
Posts: 847
Joined: Thu Dec 22, 2005 2:45 pm
Location: Central California

Re: Union Pacific Big Boy in 3/4 Inch Scale

Post by Rwilliams » Sat Jan 13, 2018 4:42 pm

Recent information has it that only one Big Boy was ever converted to oil firing and that was only for a short period of time for testing. Except for the testing time, no other Big Boy locomotives were ever converted to oil firing. The only other exception will soon be the 4014 when it operates again.

Too many details have been slowly lost to time as those who worked with big steam pass on. The massive cleansing of steam knowledge from company files at the end of steam did not help matters either. My father observed the company trash burner in the terminal where he worked filled with steam drawings and soon burned up as new diesels idled near by on the shop tracks.

JJG Koopmans
Posts: 329
Joined: Thu Oct 01, 2009 10:01 am
Location: Netherlands

Re: Union Pacific Big Boy in 3/4 Inch Scale

Post by JJG Koopmans » Sun Jan 14, 2018 8:03 am

@Rwilliams,
Thanks for the orifice data!
kind regards
Jos Koopmans

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