Standard design based on N&W Y-2 Mallet compound locomotive.Unlike the light articulateds, these engines were considered a great success. Alco (20 at Richmond and 45 at Schenectady) and Baldwin (15) built 80 of these, including 50 for the N&W as the Y-3, 20 for the Virginian, and 10 for the Clinchfield Railroad.
| Specifications | |
|---|---|
| Class | Heavy |
| Locobase ID | 330 |
| Railroad | USRA |
| Whyte | 2-8-8-2 |
| Road Numbers | 10000 |
| Gauge | Std |
| Builder | Several |
| Year | 1919 |
| Valve Gear | Baker |
| Locomotive Length and Weight | |
| Driver Wheelbase | 15.50' |
| Engine Wheelbase | 57.33' |
| Ratio of driving wheelbase to overall engine wheebase | 0.27 |
| Overall Wheelbase (engine & tender) | 93.25' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 478000 lbs |
| Engine Weight | 531000 lbs |
| Tender Light Weight | 209100 lbs |
| Total Engine and Tender Weight | 740100 lbs |
| Tender Water Capacity | 12000 gals |
| Tender Fuel Capacity (oil/coal) | 16 tons |
| Minimum weight per yard of rail on which locomotive could run | 99.58 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 57" |
| Boiler Pressure | 240 psi |
| Cylinders (dia x stroke) | 25" x 32" |
| Low Pressure Cylinders (dia x stroke) | 39" x 32" |
| Tractive Effort | 101465 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.71 |
| Heating Ability | |
| Firebox Area | 435 sq. ft |
| Grate Area | 96 sq. ft |
| Evaporative Heating Surface | 6120 |
| Superheating Surface | 1475 |
| Combined Heating Surface | 7595 |
| Evaporative Heating Surface/Cylinder Volume | 336.62 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 23040 |
| Same as above plus superheater percentage | 27514.52 |
| Same as above but substitute firebox area for grate area | 124675.18 |
| Power L1 | 11115.52 |
| Power MT | 410.13 |
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