Illinois Central 2-10-0 "Decapod" Locomotives in 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 Rail Data Exchange.

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.

Principal Dimensions 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 / m)22.33 / 6.81
Engine Wheelbase (ft / m)31.67 / 9.65
Ratio of driving wheelbase to overall engine wheebase 0.71
Overall Wheelbase (engine & tender) (ft / m)67.15 / 20.47
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)301,800 / 136,894
Engine Weight (lbs / kg)325,000 / 147,418
Tender Loaded Weight (lbs / kg)171,500 / 77,791
Total Engine and Tender Weight (lbs / kg)496,500 / 225,209
Tender Water Capacity (gals / ML)9000 / 34.09
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)16 / 14.50
Minimum weight of rail (calculated) (lb/yd / kg/m)101 / 50.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)64.50 / 1638
Boiler Pressure (psi / kPa)225 / 15.50
High Pressure Cylinders (dia x stroke) (in / mm)30" x 32" / 762x813
Tractive Effort (lbs / kg)85,395 / 38734.57
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.53
Heating Ability
Firebox Area (sq ft / m2)266.60 / 24.77
Grate Area (sq ft / m2)71.50 / 6.64
Evaporative Heating Surface (sq ft / m2)4250 / 394.83
Superheating Surface (sq ft / m2)1093 / 101.54
Combined Heating Surface (sq ft / m2)5343 / 496.37
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

All material Copyright ©
Wes Barris