Chicago & Illinois Midland 2-10-2 "Santa Fe" Type Locomotives

Class G-1/G-2 (Locobase 3170)

Data from C&IM 4 - 1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Although the diagram does not show 602-603, Locobase believes the 1929 pair met the same specifications.

Firebox had combustion chamber; arch tubes and thermic syphons contributed 116 sq ft to the firebox heating surface. Compared to other 2-10-2s of the era, these were low-drivered, coal train engines. Steam supply was adequate and, given the speeds, the 14" piston valves probably did the job as well. Locobase 7655 shows the Lima Super Santa Fes of 1931.

Class H-1 (Locobase 76)

These were a follow-on order that filled out the Chicago & Illinois Midland's Santa Fe stud. Like the others, they ran until the end of steam in drag-freight service.

Specifications
ClassG-1/G-2H-1
Locobase ID317076
RailroadChicago & Illinois MidlandChicago & Illinois Midland
Whyte2-10-22-10-2
Road Numbers600-603700-703
GaugeStdStd
BuilderBaldwinLima
Year19271931
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase21'24.30'
Engine Wheelbase41.17'42.50'
Ratio of driving wheelbase to overall engine wheebase 0.51 0.57
Overall Wheelbase (engine & tender)80.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers280100 lbs321700 lbs
Engine Weight357800 lbs405600 lbs
Tender Light Weight220300 lbs220300 lbs
Total Engine and Tender Weight578100 lbs625900 lbs
Tender Water Capacity12000 gals10000 gals
Tender Fuel Capacity (oil/coal)20 tons16 tons
Minimum weight per yard of rail on which locomotive could run93 lb rail107 lb rail
Geometry Relating to Tractive Effort
Driver Diameter57"63"
Boiler Pressure200 psi200 psi
Cylinders (dia x stroke)27" x 32"30" x 32"
Tractive Effort69575 lbs77714 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03 4.14
Heating Ability
Firebox Area444 sq. ft528 sq. ft
Grate Area76.30 sq. ft88.20 sq. ft
Evaporative Heating Surface45854870
Superheating Surface10661230
Combined Heating Surface56516100
Evaporative Heating Surface/Cylinder Volume216.21186.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1526017640
Same as above plus superheater percentage1831221168
Same as above but substitute firebox area for grate area106560126720
Power L11469314904
Power MT578.23510.69

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.

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