Midland Railway 4-6-0 "Ten-Wheeler" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 101 (Locobase 14678)
Data from DeGolyer, Volume 62, pp. 72. Works numbers were 52661, 52686, 52722 in December 1919.
A number of short lines bought Baldwin Ten-wheelers in this size over the years. Driver diameters clustered at two sizes--50" (1,270 mm) for freight or logging, 56" (1,422 mm) if the engine operated as all-purpose, mixed-train motive power. Locobase still hasn't pinned down just where this Midland Railway was in the US, but can say that it used 40 lb/yard (20 kg/metre) rail and that the locomotives burned oil.
Georgia Car & Locomotive bought all three engines from the MR within a few years of their delivery to the Midland. 101 went to the Wilmington, Brunswick & Southern in North Carolina. 102-103 were sold to Kirby Lumber of Silsbee, Tex as their 93 and 92, respectively.
(For more on the WB&S, see North Carolina Rails' account at [
].)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 101 |
| Locobase ID | 14678 |
| Railroad | Midland Railway |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 3 |
| Road Numbers | 101-103 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.83 / 3.91 |
| Engine Wheelbase (ft / m) | 22.98 / 7 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.52 / 14.79 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 73,000 / 33,112 |
| Engine Weight (lbs / kg) | 98,000 / 44,452 |
| Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
| Total Engine and Tender Weight (lbs / kg) | 178,000 / 80,739 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1700 / 6435 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56 / 1422 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 16,786 / 7614.01 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.35 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 178 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.23 / 3.73 |
| Firebox Area (sq ft / m2) | 90 / 8.36 |
| Grate Area (sq ft / m2) | 15.50 / 1.44 |
| Evaporative Heating Surface (sq ft / m2) | 1222 / 113.57 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1222 / 113.57 |
| Evaporative Heating Surface/Cylinder Volume | 218.60 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2790 |
| Same as above plus superheater percentage | 2790 |
| Same as above but substitute firebox area for grate area | 16,200 |
| Power L1 | 5025 |
| Power MT | 455.27 |