Firebox heating surface included 55 sq ft of arch tubes. Prominent "elephant-ear" smoke lifters flanked the smokebox.
15 engines delivered to the railroad in 1943 that served until 1952-1953.
These were relatively small "Northerns" that made very efficient use of firebox heating surface, which included a 7-ft-long combustion chamber, and superheater area. The latter maintained a traditional ratio of tubes to flues and, in fact, resembled closely installations in several other 4-8-4 batches delivered during World War II. (These included the Milwaukee Road S-3 (Locobase 249), Rock Island R-67 (Locobase 251), and the Union Pacific's FEF-3 (Locobase 8340).)
| Specifications | |
|---|---|
| Class | K-62 |
| Locobase ID | 256 |
| Railroad | Delaware & Hudson |
| Whyte | 4-8-4 |
| Road Numbers | 300-314 |
| Gauge | Std |
| Builder | Alco |
| Year | 1943 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 19.75' |
| Engine Wheelbase | 47.08' |
| Ratio of driving wheelbase to overall engine wheebase | 0.42 |
| Overall Wheelbase (engine & tender) | 91.58' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 270000 lbs |
| Engine Weight | 470000 lbs |
| Tender Light Weight | 289300 lbs |
| Total Engine and Tender Weight | 759300 lbs |
| Tender Water Capacity | 20000 gals |
| Tender Fuel Capacity (oil/coal) | 25 tons |
| Minimum weight per yard of rail on which locomotive could run | 112.50 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 75" |
| Boiler Pressure | 290.10 psi |
| Cylinders (dia x stroke) | 24.5" x 32" |
| Tractive Effort | 63152 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| Heating Ability | |
| Firebox Area | 482 sq. ft |
| Grate Area | 96.20 sq. ft |
| Evaporative Heating Surface | 4477 |
| Superheating Surface | 1473 |
| Combined Heating Surface | 5950 |
| Evaporative Heating Surface/Cylinder Volume | 256.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 27907.62 |
| Same as above plus superheater percentage | 34816.51 |
| Same as above but substitute firebox area for grate area | 174444.49 |
| Power L1 | 41835.52 |
| Power MT | 1366.39 |
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