Data from tables in 1930 Locomotive Cyclopedia, "Standard 2-8-8-2 Type Locomotives," Railway Mechanical Engineer, Volume 93, No 4 (April 1919), pp. 187-190, and from American Locomotive Company, Standardized Locomotives, US Railroad Administration (Alco Pamphlet 10049, 1918), pp. 34-35, reprinted by (Ocean, NJ: Specialty Press , 1973), and DeGolyer, Vol 58, pp. 186+.
See also "Standard Equipment Specialties," Railway Mechanical Engineer, Vol 93, No 3 (March 1919), pp. 137-138 for a list of all the "special equipment" by manufacturers--everything from air brakes to lubricators to rolled steel wheels--and the USRA designs on which they appeared.
Standard design based on N&W Y-2 Mallet compound locomotive. Firebox heating surface included 85 sq ft (7.9 sq m) in the combustion chamber and 49 sq ft (4.55 sq m) in arch tubes. Cylinders were served by piston valves measuring 14" (356 mm) in diameter.
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.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | Heavy |
Locobase ID | 330 |
Railroad | United States Railroad Administration (USRA) |
Country | USA |
Whyte | 2-8-8-2 |
Number in Class | |
Road Numbers | 10,000 |
Gauge | Std |
Number Built | |
Builder | Several |
Year | 1919 |
Valve Gear | Baker |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 31.50 / 9.60 |
Engine Wheelbase (ft / m) | 57.33 / 17.47 |
Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
Overall Wheelbase (engine & tender) (ft / m) | 93.25 / 28.42 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 478,000 / 216,817 |
Engine Weight (lbs / kg) | 531,000 / 240,858 |
Tender Loaded Weight (lbs / kg) | 209,100 / 94,846 |
Total Engine and Tender Weight (lbs / kg) | 740,100 / 335,704 |
Tender Water Capacity (gals / ML) | 12,000 / 45.45 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 16 / 14.50 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 100 / 50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 57 / 1448 |
Boiler Pressure (psi / kPa) | 240 / 1650 |
High Pressure Cylinders (dia x stroke) (in / mm) | 25" x 32" / 635x813 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 39" x 32" / 991x813 |
Tractive Effort (lbs / kg) | 101,465 / 46023.80 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.71 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 274 - 2.25" / 57 |
Flues (number - dia) (in / mm) | 53 - 5.5" / 140 |
Flue/Tube length (ft / m) | 24 / 7.32 |
Firebox Area (sq ft / m2) | 435 / 40.41 |
Grate Area (sq ft / m2) | 96 / 8.92 |
Evaporative Heating Surface (sq ft / m2) | 6120 / 568.56 |
Superheating Surface (sq ft / m2) | 1475 / 137.03 |
Combined Heating Surface (sq ft / m2) | 7595 / 705.59 |
Evaporative Heating Surface/Cylinder Volume | 336.71 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 23,040 |
Same as above plus superheater percentage | 27,418 |
Same as above but substitute firebox area for grate area | 124,236 |
Power L1 | 11,116 |
Power MT | 410.15 |