Chicago & Illinois Midland 4-6-0 "Ten-Wheeler" Type Locomotives

Class Details by Steve Llanso

Class 5 (Locobase 7649)

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

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.

Specifications by Steve Llanso
Locobase ID7649
RailroadChicago & Illinois Midland
Road Numbers5-6
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase11.75'
Engine Wheelbase22.33'
Ratio of driving wheelbase to overall engine wheebase 0.53
Overall Wheelbase (engine & tender)48.87'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers102000 lbs
Engine Weight124000 lbs
Tender Light Weight70000 lbs
Total Engine and Tender Weight194000 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)8 tons
Minimum weight of rail (calculated) on which locomotive could run57 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort21245 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.80
Heating Ability
Firebox Area150 sq. ft
Grate Area23.33 sq. ft
Evaporative Heating Surface1836 sq. ft
Superheating Surface
Combined Heating Surface1836 sq. ft
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 area27000
Power L16146
Power MT398.52



Introduction and roster provided by Richard Duley. Class details and specifications provided by Steve Llanso of Sweat House Media.