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

The Chicago, St. Paul, Minneapolis & Omaha Railway bought two "Santa Fe" type locomotives from the Baldwin Locomotive Works in 1917. These locomotives were used as helpers on the grades out of the St. Croix River Valley at Hudson, WI. They were designated as class J-1 and assigned road number 491 and 492. These 2-10-2 locomotives had 57" diameter drivers, 27" x 32" cylinders, a 205 psi boiler pressure, they exerted 72,300 pounds of tractive effort and each weighed 322,000 pounds.

There are no surviving CStPM&O 2-10-2 "Santa Fe" type locomotives.

Roster

Class	Qty.	Road Numbers	Year Built	Builder	Notes
J-1	2	491 & 492	1917	Baldwin	Numbers 491 and 492 transferred to the C&NW in 1944 in exchange for two 2-8-2 Class J numbers 2363 and 2371, which became CStPM&O numbers 440 and 441. The C&NW converted numbers 491 and 492 to 0-4-2 in 1944 and then scrapped number 492 in 1949 and scrapped number 491 in 1953.

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.

Principal Dimensions by Steve Llanso of Middle Run Media
Class	J-1	J-1-superheated
Locobase ID	14578	14579
Railroad	Chicago, St Paul, Minneapolis & Omaha (C&NW)	Chicago, St Paul, Minneapolis & Omaha (C&NW)
Country	USA	USA
Whyte	2-10-2	2-10-2
Number in Class	2	2
Road Numbers	491-492	491-492
Gauge	Std	Std
Number Built	2	2
Builder	Baldwin	C&NW
Year	1917	1917
Valve Gear	Baker	Baker
	Locomotive Length and Weight
Driver Wheelbase (ft / m)	21 / 6.40	21 / 6.40
Engine Wheelbase (ft / m)	38.92 / 11.86	38.92 / 11.86
Ratio of driving wheelbase to overall engine wheelbase	0.54	0.54
Overall Wheelbase (engine & tender) (ft / m)	71.58 / 21.82	71.58 / 21.82
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)	265,000 / 120,202	266,000 / 120,656
Engine Weight (lbs / kg)	331,000 / 150,139	331,000 / 150,139
Tender Loaded Weight (lbs / kg)	165,500 / 75,070	165,500 / 75,070
Total Engine and Tender Weight (lbs / kg)	496,500 / 225,209	496,500 / 225,209
Tender Water Capacity (gals / ML)	8725 / 33.05	8275 / 31.34
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)	13 / 12	13 / 12
Minimum weight of rail (calculated) (lb/yd / kg/m)	88 / 44	89 / 44.50
	Geometry Relating to Tractive Effort
Driver Diameter (in / mm)	57 / 1448	57 / 1448
Boiler Pressure (psi / kPa)	185 / 1280	205 / 1410
High Pressure Cylinders (dia x stroke) (in / mm)	27" x 32" / 686x813	27" x 32" / 686x813
Tractive Effort (lbs / kg)	64,357 / 29191.88	71,314 / 32347.52
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.12	3.73
	Heating Ability
Tubes (number - dia) (in / mm)	490 - 2" / 51	234 - 2" / 51
Flues (number - dia) (in / mm)		45 - 5.375" / 137
Flue/Tube length (ft / m)	21 / 6.40	21 / 6.40
Firebox Area (sq ft / m²)	319 / 29.64	319 / 29.64
Grate Area (sq ft / m²)	66.60 / 6.19	66.50 / 6.18
Evaporative Heating Surface (sq ft / m²)	5685 / 528.15	4233 / 393.26
Superheating Surface (sq ft / m²)		1052 / 97.73
Combined Heating Surface (sq ft / m²)	5685 / 528.15	5285 / 490.99
Evaporative Heating Surface/Cylinder Volume	268.03	199.58
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	12,321	13,633
Same as above plus superheater percentage	12,321	16,359
Same as above but substitute firebox area for grate area	59,015	78,474
Power L1	6032	14,045
Power MT	250.91	582.03

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

Roster

Class Details by Steve Llanso of Sweat House Media

Class J-1 (Locobase 14578)

Class J-1-superheated (Locobase 14579)

Photos