Chicago, St Paul, Minneapolis & Omaha 2-10-2 "Santa Fe" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class J-1 (Locobase 14578)

Data from DeGolyer, Volume 55, pp. 65+. Works numbers were 45976-45977 in July 1917.

Very few Santa Fe-arrangement locomotives were delivered with saturated boilers. Their direct heating surface areas included 79 sq ft (7.3 sq m) in the combustion chamber and 28 sq ft (2.6 sq m) of arch tubes. Fourteen-inch (381 mm) piston valves fed the cylinders

These two had a specific mission to serve as helpers on trains climbing out of the St Croix Valley in western Wisconsin.

At some point, the J-1s were superheated; see Locobase 14578.

Class J-1-superheated (Locobase 14579)

Data from C&NW 10 -1 1952 locomotive diagrams supplied by Allen Stanley in May 2005.

Delivered in 1917 with saturated boilers (Locobase 14578), these Santa Fes were later superheated.

After 1944, the pair bore the Chicago & North Western herald. Both engines lost their leading axles and operated as heavy 0-10-2 switchers after conversions in January (492) and July (491) 1944.

492 was retired in 1950 and 491 left in 1953.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14,578 14,579
RailroadChicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)
Number in Class22
Road Numbers491-492491-492
Number Built22
Valve GearBakerBaker
Locomotive Length and Weight
Driver Wheelbase (ft)2121
Engine Wheelbase (ft)38.9238.92
Ratio of driving wheelbase to overall engine wheebase 0.54 0.54
Overall Wheelbase (engine & tender) (ft)71.5871.58
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)265,000266,000
Engine Weight (lbs)331,000331,000
Tender Loaded Weight (lbs)165,500165,500
Total Engine and Tender Weight (lbs)496,500496,500
Tender Water Capacity (gals)87258275
Tender Fuel Capacity (oil/coal) (gals/tons)1313
Minimum weight of rail (calculated) (lb/yd)8889
Geometry Relating to Tractive Effort
Driver Diameter (in)5757
Boiler Pressure (psi)185205
High Pressure Cylinders (dia x stroke) (in)27" x 32"27" x 32"
Tractive Effort (lbs)64,35771,314
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12 3.73
Heating Ability
Firebox Area (sq ft)319319
Grate Area (sq ft)66.6066.50
Evaporative Heating Surface (sq ft)56854233
Superheating Surface (sq ft)1052
Combined Heating Surface (sq ft)56855285
Evaporative Heating Surface/Cylinder Volume268.09199.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12,32113,633
Same as above plus superheater percentage12,32116,359
Same as above but substitute firebox area for grate area59,01578,474
Power L1603414,048
Power MT250.99582.15


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