Illinois Central 2-4-6 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 242 / 1424 (Locobase 6950)

Data from IC 1913ca locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also E E R Tratman, "Tank Locomotives", Official Proceedings of the Western Railway Club (Chicago: W F Hall Printing Company, 1903), pp. 342 et seq. Works numbers 4851-4858 in April 1893, 5082-5083 in November 1895.

These 2-4-6Ts probably derived from earlier 2-4-4T Forneys with an extra supporting axle for a larger bunker and tank. They don't compare in adhesive weight with contemporaneous 2-6-4Ts. Like the other suburban tanks on the IC, these were rated at 70,000 miles (112,700 km) between general repairs.

Two (1424, 1432) were sold March 1928 to Peoria & Pekin Union as #18-19 and 1430 to Briggs & Turvias Co. The rest remained on the IC roster until they were withdrawn. One was scrapped in 1926, four scrapped in March 1928, two more in March 1935, and the last (1431) in June of that year.

Specifications by Steve Llanso of Sweat House Media
Class242 / 1424
Locobase ID6950
RailroadIllinois Central (IC)
Number in Class10
Road Numbers241-250 / 1424-1433
Number Built10
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 6.83'
Engine Wheelbase32.58'
Ratio of driving wheelbase to overall engine wheebase 0.21
Overall Wheelbase (engine & tender)32.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers72000 lbs
Engine Weight166000 lbs
Tender Light Weight
Total Engine and Tender Weight166000 lbs
Tender Water Capacity2500 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)60 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56.50"
Boiler Pressure160 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort16696 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.31
Heating Ability
Firebox Area116.43 sq. ft
Grate Area23.05 sq. ft
Evaporative Heating Surface1251 sq. ft
Superheating Surface
Combined Heating Surface1251 sq. ft
Evaporative Heating Surface/Cylinder Volume198.41
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3688
Same as above plus superheater percentage3688
Same as above but substitute firebox area for grate area18629
Power L14381
Power MT268.29


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