Sumpter Valley 4-6-0 "Ten-Wheeler" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 50 (Locobase 12506)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 51, p. 357. (Thanks to Chris Hohl for his 11 March 2016 email noting the tender's fuel capacity.) Works number was 42865 in February 1916.
This Ten-wheeler 's tender carried 3 1/2 cords of wood. The DeWitt Museum's Facebook page ([
], last visited 4 April 2016) says that the cabbage-stacked 50 "was mainly used for the passenger line and had multiple wrecks."
The 50 retired in 1941, sold to locomotive rebuilder/reseller Dulien Steel Products. Dulien sold the 50 to Peru's Cuzco as their 125.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 50 |
| Locobase ID | 12506 |
| Railroad | Sumpter Valley |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 50 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1916 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11 / 3.35 |
| Engine Wheelbase (ft / m) | 20.33 / 6.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.54 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.10 / 14.66 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 72,000 / 32,659 |
| Engine Weight (lbs / kg) | 91,000 / 41,277 |
| Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
| Total Engine and Tender Weight (lbs / kg) | 171,000 / 77,564 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 41 / 1118 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 19,106 / 8666.35 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.77 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.50 / 3.81 |
| Firebox Area (sq ft / m2) | 111 / 10.32 |
| Grate Area (sq ft / m2) | 14.20 / 1.32 |
| Evaporative Heating Surface (sq ft / m2) | 1411 / 131.13 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1411 / 131.13 |
| Evaporative Heating Surface/Cylinder Volume | 303.44 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2556 |
| Same as above plus superheater percentage | 2556 |
| Same as above but substitute firebox area for grate area | 19,980 |
| Power L1 | 5200 |
| Power MT | 477.67 |