Biggest Consolidations on the line; most out of service by 1950.
(http:/fp-www.wwnet.net/`dulong/dssa/locomot.thm)
These Consolidations, delivered after the First World War, outdid the F-3 (Locobase 1334) by wringing more tractive effort out the same boiler using a higher boiler pressure and more superheating surface. On the other hand, the ratio of boiler to cylinder suggest a system that would lose steam relatively soon into a continuous effort.
| Specifications | ||
|---|---|---|
| Class | F-3 | F-4 |
| Locobase ID | 1334 | 6668 |
| Railroad | Duluth, South Shore, & Atlantic | Duluth, South Shore, & Atlantic |
| Whyte | 2-8-0 | 2-8-0 |
| Road Numbers | 700-711 | 918 |
| Gauge | Std | Std |
| Builder | Alco-Brooks | Alco-Brooks |
| Year | 1913 | 1924 |
| Valve Gear | Walschaert | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase | 16' | 15.33' |
| Engine Wheelbase | 24.50' | 24.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.65 | 0.63 |
| Overall Wheelbase (engine & tender) | 53.67' | 53.17' |
| Axle Loading (Maximum Weight per Axle) | ||
| Weight on Drivers | 164350 lbs | 166000 lbs |
| Engine Weight | 186300 lbs | 192000 lbs |
| Tender Light Weight | 115200 lbs | 121800 lbs |
| Total Engine and Tender Weight | 301500 lbs | 313800 lbs |
| Tender Water Capacity | 6000 gals | 6000 gals |
| Tender Fuel Capacity (oil/coal) | 9 tons | 9 tons |
| Minimum weight per yard of rail on which locomotive could run | 68.48 lb rail | 69.17 lb rail |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter | 55" | 51" |
| Boiler Pressure | 180 psi | 190 psi |
| Cylinders (dia x stroke) | 21" x 30" | 21" x 28" |
| Tractive Effort | 36803 lbs | 39102 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.47 | 4.25 |
| Heating Ability | ||
| Firebox Area | 182 sq. ft | 180 sq. ft |
| Grate Area | 44.56 sq. ft | 44.40 sq. ft |
| Evaporative Heating Surface | 1471 | 1330 |
| Superheating Surface | 469 | 509 |
| Combined Heating Surface | 1940 | 1839 |
| Evaporative Heating Surface/Cylinder Volume | 122.31 | 118.49 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 8020.80 | 8436 |
| Same as above plus superheater percentage | 9959.85 | 10770.92 |
| Same as above but substitute firebox area for grate area | 40679.81 | 43665.91 |
| Power L1 | 9057.82 | 9799.65 |
| Power MT | 486.01 | 520.59 |
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