Data from IC 1913ca locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. 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to Peoria & Pekin Union as #18-19 and 1430 to Briggs & Turvias Co. The rest remained on the IC roster until they were withdrawn.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.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 242 / 1424 |
| Locobase ID | 6950 |
| Railroad | Illinois Central (IC) |
| Country | USA |
| Whyte | 2-4-6T |
| Number in Class | 10 |
| Road Numbers | 241-250 / 1424-1433 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Rogers |
| Year | 1893 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.83 / 2.08 |
| Engine Wheelbase (ft / m) | 32.58 / 9.93 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.21 |
| Overall Wheelbase (engine & tender) (ft / m) | 32.58 / 9.93 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 72,000 / 32,659 |
| Engine Weight (lbs / kg) | 166,000 / 75,296 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2500 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 60 / 30 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56.50 / 1435 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 16,696 / 7573.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.31 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10 / 3.05 |
| Firebox Area (sq ft / m2) | 116.43 / 10.82 |
| Grate Area (sq ft / m2) | 23.05 / 2.14 |
| Evaporative Heating Surface (sq ft / m2) | 1251 / 116.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1251 / 116.26 |
| Evaporative Heating Surface/Cylinder Volume | 198.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3688 |
| Same as above plus superheater percentage | 3688 |
| Same as above but substitute firebox area for grate area | 18,629 |
| Power L1 | 4377 |
| Power MT | 268.05 |