Data from Lake Terminal RR 1929ca Locomotive Diagrams supplied in May 205 by Allen Stanley from his extensive Rail Data Exchange. See also "A Heavy Switching Locomotive with Side Sandboxes", Engineering News, Volume 69, No 6 (6 February 1913), p. 239; and DeGolyer, Volume 41, p. 65.. Works number was 37349 in November 1911.
This single all-adhesion Mallet entered service to haul loaded cars back and forth to the National Tube Company in Lorain, Ohio. The Engineering News report focused on the provision of two sandboxes on each side of the boiler near the top. So arranged, each sandbox could serve one bank of three drivers. The report also pointed out that "[w]hile the run is short [to National Tube], the operating conditions are severe. Directly after starting, the engine has to pass a curve of 7 deg 48 minutes on a grade of 1.23%, and on the straight track there is a maximum grade of 1.65%.
Although well-suited to the tight curves and alignments, the big lone Mallet was scrapped in 1927.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 20 |
| Locobase ID | 9840 |
| Railroad | Lake Terminal |
| Country | USA |
| Whyte | 0-6-6-0 |
| Number in Class | 1 |
| Road Numbers | 20 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1911 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 20 / 6.10 |
| Engine Wheelbase (ft / m) | 29.67 / 9.04 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.67 |
| Overall Wheelbase (engine & tender) (ft / m) | 62.23 / 18.97 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 350,100 / 158,803 |
| Engine Weight (lbs / kg) | 350,100 / 158,803 |
| Tender Loaded Weight (lbs / kg) | 129,900 / 58,922 |
| Total Engine and Tender Weight (lbs / kg) | 480,000 / 217,725 |
| Tender Water Capacity (gals / ML) | 7000 / 26.52 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 12 / 11 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 97 / 48.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55 / 1397 |
| Boiler Pressure (psi / kPa) | 205 / 1410 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 24" x 32" / 610x813 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 37" x 32" / 940x813 |
| Tractive Effort (lbs / kg) | 82,205 / 37287.61 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.26 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 437 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 21 / 6.40 |
| Firebox Area (sq ft / m2) | 260 / 24.15 |
| Grate Area (sq ft / m2) | 78.30 / 7.28 |
| Evaporative Heating Surface (sq ft / m2) | 5640 / 524.16 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 5640 / 524.16 |
| Evaporative Heating Surface/Cylinder Volume | 336.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 16,052 |
| Same as above plus superheater percentage | 16,052 |
| Same as above but substitute firebox area for grate area | 53,300 |
| Power L1 | 3275 |
| Power MT | 123.74 |