Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 39, p. 91. See Larry Smith, "Twin Mountains & Potomac Railroad," Model Railroading (August 1993), pp. 43- at [] ; an account at Patrick H Stakem, [
], last accessed 5 February 2012 ((dead link when tested 26 November 2020); and Larry Smith, "Lite and Narrow", Model Railroad Hobbyist #80 (October 2016), pp. 1-30 at [
], last accessed 26 November 2020. Works number was 37326 in December 1911.
H L Heintzelman was frustrated with the service available to ship fruit from the orchards at the base of Patterson Creek Mountain to the B & O's St Louis main line at Keyser, some 26 miles distant. So he built this narrow-gauge line to connect the two and opened it on 2 March 1913. 45-lb/yard (22.5-kg/metre) rail, 4% grades, and 30-deg (193-ft/58.8-metre radius) curves indicate the lightness and tightness of this railroad's alignment.
The phstakem entry tells us that during its 6-year existence, the TM & P operated only these two Ten-wheelers and an 0-4-0T dinky (Smith believes the latter was built by Porter). Clearly, Heintzelman intended full service for he provided not only fruit-hauling, but also passenger service in the form of special trains for church meetings. Phstakem also has the lyrics of a song, written to the tune of Casey Jones, describing the day the circus train ran away.
Smith reports that the "Two Mules and a Pony" never made money and a 1918 peach blight killed most of the crop at the same time orchards lost manpower to the US World War I draft. It closed in February 1919.
Two years after the abandonment, West Virginia bought the 2 in April 1921, operated it for about 5 years, sold it to Gray Lumber Company in October 1926. Sometime later Gray sold the engine to the East Tennessee & Western North Carolina (Tweetsie) as their #8. The Tweetsie operated the 8 until 1939. (Gene Connelly's compilation of all Baldwin production notes that the 1 was scrapped in August 1940, but doesn't identify its owner at the time.)
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 1 |
Locobase ID | 13836 |
Railroad | Twin Mountain & Potomac |
Country | USA |
Whyte | 4-6-0 |
Number in Class | 2 |
Road Numbers | 1-2 |
Gauge | 3' |
Number Built | 2 |
Builder | Baldwin |
Year | 1911 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 9 / 2.74 |
Engine Wheelbase (ft / m) | 18.50 / 5.64 |
Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 70,500 / 31,978 |
Engine Weight (lbs / kg) | 88,500 / 40,143 |
Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
Total Engine and Tender Weight (lbs / kg) | 148,500 / 67,359 |
Tender Water Capacity (gals / ML) | 3000 / 11.36 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 45 / 1143 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 |
Tractive Effort (lbs / kg) | 16,830 / 7633.97 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.19 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 188 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 11.65 / 3.55 |
Firebox Area (sq ft / m2) | 100 / 9.29 |
Grate Area (sq ft / m2) | 14.60 / 1.36 |
Evaporative Heating Surface (sq ft / m2) | 1238 / 115.01 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1238 / 115.01 |
Evaporative Heating Surface/Cylinder Volume | 275.11 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2628 |
Same as above plus superheater percentage | 2628 |
Same as above but substitute firebox area for grate area | 18,000 |
Power L1 | 5214 |
Power MT | 489.14 |