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 ID15,621
RailroadIllinois Central (IC)
Number in Class15
Road Numbers3610-3624
Number Built
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft)22.33
Engine Wheelbase (ft)31.67
Ratio of driving wheelbase to overall engine wheebase 0.71
Overall Wheelbase (engine & tender) (ft)67.15
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)301,800
Engine Weight (lbs)325,000
Tender Light Weight (lbs)171,500
Total Engine and Tender Weight (lbs)496,500
Tender Water Capacity (gals)9000
Tender Fuel Capacity (oil/coal) (gals/tons)16
Minimum weight of rail (calculated) (lb/yd)101
Geometry Relating to Tractive Effort
Driver Diameter (in)64.50
Boiler Pressure (psi)225
High Pressure Cylinders (dia x stroke) (in)30" x 32"
Tractive Effort (lbs)85,395
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.53
Heating Ability
Firebox Area (sq ft)266.60
Grate Area (sq ft)71.50
Evaporative Heating Surface (sq ft)4250
Superheating Surface (sq ft)1093
Combined Heating Surface (sq ft)5343
Evaporative Heating Surface/Cylinder Volume162.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16,088
Same as above plus superheater percentage19,305
Same as above but substitute firebox area for grate area71,982
Power L114,246
Power MT520.33


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