Chicago & Illinois Midland 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 5 (Locobase 7649)

Data from C&IM 4 -1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Almost 50 years after it went into service, this class had very little commentary to accompany it in the diagram book. It seems a dated design for 1897 with the firebox filling the cab, the dome just ahead of the cab but over the second driven axle and a long slender first course to the boiler.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID7649
RailroadChicago & Illinois Midland (C&IM)
Number in Class2
Road Numbers5-6
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.75 / 3.58
Engine Wheelbase (ft / m)22.33 / 6.81
Ratio of driving wheelbase to overall engine wheebase 0.53
Overall Wheelbase (engine & tender) (ft / m)48.87 / 14.90
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)102,000 / 46,266
Engine Weight (lbs / kg)124,000 / 56,246
Tender Loaded Weight (lbs / kg)70,000 / 31,752
Total Engine and Tender Weight (lbs / kg)194,000 / 87,998
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)57 / 28.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)21,245 / 9636.58
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.80
Heating Ability
Firebox Area (sq ft / m2)150 / 13.94
Grate Area (sq ft / m2)23.33 / 2.17
Evaporative Heating Surface (sq ft / m2)1836 / 170.63
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1836 / 170.63
Evaporative Heating Surface/Cylinder Volume259.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4199
Same as above plus superheater percentage4199
Same as above but substitute firebox area for grate area27,000
Power L16146
Power MT398.52

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Wes Barris