QUOTE: Originally posted by M636C Mark, B&O 4434 was built by Baldwin in March 1921 b/n 54681, as a B&O class Q-4 Mikado. It had 26x32 cylinders, 64" drivers, 220 lbf per sq in pressure, weighed 327 000 lbs and had a tractive effort of 63200 lbf. It was renumbered 421 in 1957 and was retired in November 1959. The locomotive was very similar to the USRA standard light Mikado, (B&O Q-3) but had a higher pressure and cylinders with 2 inches longer stroke. Sorry, can't help with CB&Q 4000, although I seem to recall (if I'm thinking of the right engine) that it was fitted with a streamlined shroud to act as protection power for Zephyrs, named "Aeolus" ("God of the Winds"). There is a story that the men called it "Big Alice the Goon", possibly a comment on its appearance. By the way, one of my school friends really was called Dougal, so I don't have any problems with the name. Peter
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