After March 1914 tests among 10 each of the CGW's Consolidations, these Mallets, and the newer Mikados over the Eastern Division between Oelwein, Iowa and Stockton, Ill, the Railway Age (30 October 1914) summarized the Prairie Mallet's performance: "It is surprising to note the relatively small amount of gross tons per mile for the Mallet locomotives with such a high percentage of gross to potential ton miles." It isn't surprising, therefore, to find these engines moving on to the Clinchfield by 1916. The CGW simply found the Mikados they were buying more suitable to their requirements.
Picked up by the Clinchfield after the Chicago Great Western found them unsuitable, they lasted only a few years. As Drury (1993) comments: "Their early retirement in 1925 is probably a good indication of their performance."
| Specifications | |
|---|---|
| Class | H1 |
| Locobase ID | 3091 |
| Railroad | Chicago Great Western |
| Whyte | 2-6-6-2 |
| Road Numbers | 600-609 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 10' |
| Engine Wheelbase | 45.33' |
| Ratio of driving wheelbase to overall engine wheebase | 0.22 |
| Overall Wheelbase (engine & tender) | 72' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 307000 lbs |
| Engine Weight | 353100 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 353100 lbs |
| Tender Water Capacity | 8000 gals |
| Tender Fuel Capacity (oil/coal) | 15 tons |
| Minimum weight per yard of rail on which locomotive could run | 85.28 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 57" |
| Boiler Pressure | 205 psi |
| Cylinders (dia x stroke) | 23" x 32" |
| Low Pressure Cylinders (dia x stroke) | 35" x 32" |
| Tractive Effort | 72284 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.25 |
| Heating Ability | |
| Firebox Area | 250 sq. ft |
| Grate Area | 78 sq. ft |
| Evaporative Heating Surface | 5789 |
| Superheating Surface | |
| Combined Heating Surface | 5789 |
| Evaporative Heating Surface/Cylinder Volume | 376.20 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 15990 |
| Same as above plus superheater percentage | 15990 |
| Same as above but substitute firebox area for grate area | 51250 |
| Power L1 | 3847.04 |
| Power MT | 165.76 |
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