The diagram tells us that 1, 3, and 4 had Southern valve gear, #2 had Stephenson link motion. It also gives as construction dates: 1 in 1905, 2 in 1911, 3 in 1907, and 4 in 1903 ...
This westernVirginia shortline class served the 88-mile road for decades from the time of their purchase. Interstate opened in1896 to move coal from several mines to L & N's connection at Appalachia. Later links reached Norton (N & W) and the Miller Yard (Clinchfield). In 1960 it was acquired by the Southern Railway.
These Consolidations had relatively tall drivers for a mountain profile, long cylinder stroke, and rode lightly (which resulted in a low factor of adhesion). A small boiler was partially compensated for by a decent amount of superheat, though the design clearly was conservative.
| Specifications | ||
|---|---|---|
| Class | 1-4 | 5 |
| Locobase ID | 6440 | 5430 |
| Railroad | Interstate | Interstate |
| Whyte | 2-8-0 | 2-8-0 |
| Road Numbers | 1-4 | 5-8 |
| Gauge | Std | Std |
| Builder | Baldwin | Baldwin |
| Year | 1903 | 1915 |
| Valve Gear | Southern | Southern |
| Locomotive Length and Weight | ||
| Driver Wheelbase | 14.25' | 17' |
| Engine Wheelbase | 22.33' | 26.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.64 | 0.65 |
| Overall Wheelbase (engine & tender) | 52.96' | 58.83' |
| Axle Loading (Maximum Weight per Axle) | 48050 lbs | |
| Weight on Drivers | 128900 lbs | 192200 lbs |
| Engine Weight | 145500 lbs | 226500 lbs |
| Tender Light Weight | 130000 lbs | 137400 lbs |
| Total Engine and Tender Weight | 275500 lbs | 363900 lbs |
| Tender Water Capacity | 6500 gals | 7000 gals |
| Tender Fuel Capacity (oil/coal) | 9 tons | 12 tons |
| Minimum weight per yard of rail on which locomotive could run | 53.71 lb rail | 80.08 lb rail |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter | 50" | 61" |
| Boiler Pressure | 180 psi | 180 psi |
| Cylinders (dia x stroke) | 21" x 26" | 25" x 32" |
| Tractive Effort | 35086 lbs | 50164 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.67 | 3.83 |
| Heating Ability | ||
| Firebox Area | 214 sq. ft | |
| Grate Area | 33.20 sq. ft | 54 sq. ft |
| Evaporative Heating Surface | 2006 | 2951 |
| Superheating Surface | 646 | |
| Combined Heating Surface | 2006 | 3597 |
| Evaporative Heating Surface/Cylinder Volume | 192.46 | 162.32 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 5976 | 9720 |
| Same as above plus superheater percentage | 5976 | 11465.65 |
| Same as above but substitute firebox area for grate area | 0 | 45437.96 |
| Power L1 | 0 | 9899.64 |
| Power MT | 0 | 454.21 |
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