Chicago & North Western 0-10-2 "Union" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class J-1 (Locobase 8384)

Data from C & NW 10 - 1952 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 45976-45977 in July 1917.

Drury (1993) tells us that these two locomotives originally went into service with the CStPM&O as 2-10-2 Santa Fes. Apparently the wheel arrangement didn't fit North Western requirements as these were the only two of that layout. In 1944, the locomotives went to the Proviso Yard as heavyweight switchers. After suffering derailments over the hump, the railroad removed the front truck and these very big 0-10-2s resulted. The 492 was scrapped in 1949, 491 in 1953.

Specifications by Steve Llanso of Sweat House Media
ClassJ-1
Locobase ID8384
RailroadChicago & North Western (C&NW)
CountryUSA
Whyte0-10-2
Number in Class2
Road Numbers491-492
GaugeStd
Number Built
BuilderC&NW
Year1944
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft / m)21 / 6.40
Engine Wheelbase (ft / m)30.50 / 9.30
Ratio of driving wheelbase to overall engine wheebase 0.69
Overall Wheelbase (engine & tender) (ft / m)63.17 / 19.25
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)297,400 / 134,899
Engine Weight (lbs / kg)322,700 / 146,374
Tender Loaded Weight (lbs / kg)159,100 / 72,167
Total Engine and Tender Weight (lbs / kg)481,800 / 218,541
Tender Water Capacity (gals / ML)6275 / 23.77
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)13 / 11.80
Minimum weight of rail (calculated) (lb/yd / kg/m)99 / 49.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 1448
Boiler Pressure (psi / kPa)205 / 14.10
High Pressure Cylinders (dia x stroke) (in / mm)27" x 32" / 686x813
Tractive Effort (lbs / kg)71,314 / 32347.52
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Firebox Area (sq ft / m2)317.50 / 29.51
Grate Area (sq ft / m2)66.50 / 6.18
Evaporative Heating Surface (sq ft / m2)4233 / 393.40
Superheating Surface (sq ft / m2)1052 / 97.77
Combined Heating Surface (sq ft / m2)5285 / 491.17
Evaporative Heating Surface/Cylinder Volume199.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation13,633
Same as above plus superheater percentage16,359
Same as above but substitute firebox area for grate area78,105
Power L114,041
Power MT520.43

Reference