Atchison, Topeka & Santa Fe Mountains

The Atchison, Topeka & Santa Fe Railway was experiencing the same problem with its "Pacifics" that many railroads were having. The "Pacifics" were not adequate for the longer passenger trains on many of its routes. Looking for more power, the AT&SF bought two 4-8-2 "Mountains" from the Baldwin Locomotive Works in 1918. One of them, road number 3700, was a coal burner and the other, road number 3701, burned oil. Before these two were delivered, another ten were ordered: five coal burners and five oil burners (road numbers 3702 through 3711). Between 1919 and 1924, the AT&SF would purchase another 39 "Mountains" (road numbers 3712 through 3750). Twenty of them were oil burners and nineteen were coal burners.

All 51 of these "Mountains" were built by the Baldwin Locomotive Works and were designated as Class 3700. They all had 28 x 28 cylinders, 69" drivers, a boiler pressure of 210 psi, a tractive effort of 56,788 lbs and weighed approximately 352,000 pounds.

The entire group of Class 3700 "Mountains" were retired and scrapped between 1950 and 1955.

ClassRoad NumbersYear BuiltBuilder
37003700-37011918Baldwin
37003702-37111919Baldwin
37003712-37221920Baldwin
37003723-37361921Baldwin
37003737-37441923Baldwin
37003745-37501924Baldwin

Specifications for Class 3700
Coal BurnerOil Burner
Wheel Arrangement:4-8-24-8-2
Length:87' - 4"87' - 4"
Drivers:69" dia.69" dia.
Weight on Drivers:240,648 lbs238,500 lbs
Locomotive Weight:355,768 lbs351,300 lbs
Locomotive & Tender Weight:589,488 lbs587,900 lbs
Grate Area:71.7 sq ft71.7 sq ft
Cylinders (dia. x stroke):(2) 28" x 28"(2) 28" x 28"
Boiler Pressure:210 psi210 psi
Tractive Effort:56,788 lbs56,788 lbs
Tender Capacity12,000 gals. water
16 tons coal		12,000 gals. water
4000 gals. oil

Photos

Reference

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