Illinois Central 2-10-0 "Decapod" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 3610 (Locobase 15621)

Data from IC 1955 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

As noted in Locobase 461, the 2-10-2 "Centrals"(2900 class) delivered by Lima in the early 1920s were deemed too slow for later traffic demands. So many were made over in a variety of wheel arrangements.

This entry shows the fifteen Decapods that resulted from mating sets of 2900 cylinder and frames with a 1500-class (2-8-2) boiler. Their firebox heating surface area included 31.6 sq ft (2.95 sq m) of arch tubes.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15621
RailroadIllinois Central (IC)
Number in Class15
Road Numbers3610-3624
Number Built
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase22.33'
Engine Wheelbase31.67'
Ratio of driving wheelbase to overall engine wheebase 0.71
Overall Wheelbase (engine & tender)67.15'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers301800 lbs
Engine Weight325000 lbs
Tender Light Weight171500 lbs
Total Engine and Tender Weight496500 lbs
Tender Water Capacity9000 gals
Tender Fuel Capacity (oil/coal)16 tons
Minimum weight of rail (calculated)101 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter64.50"
Boiler Pressure225 psi
Cylinders (dia x stroke)30" x 32"
Tractive Effort85395 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.53
Heating Ability
Firebox Area266.60 sq. ft
Grate Area71.50 sq. ft
Evaporative Heating Surface4250 sq. ft
Superheating Surface1093 sq. ft
Combined Heating Surface5343 sq. ft
Evaporative Heating Surface/Cylinder Volume162.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16088
Same as above plus superheater percentage19305
Same as above but substitute firebox area for grate area71982
Power L114246
Power MT520.33


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