Although originally intended for the Shreveport-KC run, World War II delayed upgrading the rail south of De Queen, Ark. to the 127-lb standard, so these engines worked on the Northern Division only. During World War II, these engines stepped in to pull troop trains and were able to meet passenger train schedules. Although not quite attaining the tonnage ratings of the road's "Big Mallies," these engines represented superpower at its most striking.
| Specifications | |
|---|---|
| Class | J |
| Locobase ID | 97 |
| Railroad | Kansas City Southern (KCS) |
| Whyte | 2-10-4 |
| Road Numbers | 900-909 |
| Gauge | Std |
| Builder | Lima |
| Year | 1937 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 24.30' |
| Engine Wheelbase | 48.70' |
| Ratio of driving wheelbase to overall engine wheebase | 0.50 |
| Overall Wheelbase (engine & tender) | |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 353300 lbs |
| Engine Weight | 509000 lbs |
| Tender Light Weight | 359690 lbs |
| Total Engine and Tender Weight | 868690 lbs |
| Tender Water Capacity | 20700 gals |
| Tender Fuel Capacity (oil/coal) | 25 tons |
| Minimum weight per yard of rail on which locomotive could run | 118 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 70" |
| Boiler Pressure | 310 psi |
| Cylinders (dia x stroke) | 27" x 34" |
| Tractive Effort | 93302 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.79 |
| Heating Ability | |
| Firebox Area | 500 sq. ft |
| Grate Area | 107 sq. ft |
| Evaporative Heating Surface | 5154 |
| Superheating Surface | 2075 |
| Combined Heating Surface | 7229 |
| Evaporative Heating Surface/Cylinder Volume | 228.75 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 33170 |
| Same as above plus superheater percentage | 43121 |
| Same as above but substitute firebox area for grate area | 201500 |
| Power L1 | 42263 |
| Power MT | 1318.62 |
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