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Milwaukee S Class Locomotives Chicago Milwaukee St. Paul And Pacific Wilkerson
The Milwaukee S Class Locomotives Chicago Milwaukee St. Paul And Pacific by Bill Wilkerson
Softcover 43 pages
"Orphan Annie" an S 1
The Enginemen and nearly everyone associated with her called her ORPHAN ANNIE, because for nearly 8 years, she was the only one of her kind on the Milwaukee. Don't confuse her with the funny paper Little Orphan Annie, because in no way could you class her as little. She weighed 740,000 pounds, was 101 feet long, stood 15'- 10" high, had eight driving wheels 74" in diameter that were powered by two cylinders 28 " in diameter with a 30" stroke and her 230 pounds of super heated steam developed
62,138 pounds of tractive effort. She was number 9700, the Milwaukee's lone 4-8-4 Northern type class SI. She was delivered by Baldwin Locomotive Works in Philadelphia in April 1930. For the next 72 years she would be the largest steam locomotive on the Milwaukee Road. At first some tried to call her Madam Queen of the then popular Amos and Andy radio show, but Orphan Annie finally won out and she was pretty well referred to by that name for all her 25 years of service.
In case you wonder why steam locomotives were referred to as being feminine, every steam locomotive officially had a petticoat, an apron, some had skirts, all had a tender behind and it took a man to control her.
Annie made her first trip into Harlowton May 1, 1930, pulling the Olympian. For about the next two years, she would be there every third morning at 5:55 A.M., or later. She would spend the day and depart on train 16, the eastbound Olympian at midnight.
Why was she an Orphan locomotive? She was built strictly for evaluation against the twenty-two class F6 Hudson type 4-6-4 locomotives that had been purchased at the same time. To keep costs down, Annie had as many F6 parts as possible and was similar in appearance with the first fourteen F6 locomotives that she was built with. She had the same commonwealth outside roller bearing pilot and trailing truck, the same Laird crosshead guides, Baker Valve gear, same cab and the same 20-ton and 15,000 gallon tender. She differed in that she had eight driving wheels 74" in diameter instead of six driving wheels 80 " in diameter. She had 28" x 30 " cylinders instead of the F6s' 26"x 28" cylinders. She had a much larger boiler and firebox and of course was much heavier. Annie had the same type one piece cast steel frame with the cylinders cast right in it.
I'll give you a little background history to explain why she was built in the first place.
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