Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), p. 1025. Works numbers were 5843 in June 1916, 5844-5845 in July.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 20 |
| Locobase ID | 14997 |
| Railroad | National Tube Company |
| Country | USA |
| Whyte | 0-4-0ST |
| Number in Class | 3 |
| Road Numbers | 20-22 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Porter |
| Year | 1916 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.75 / 1.75 |
| Engine Wheelbase (ft / m) | 5.75 / 1.75 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5.75 / 1.75 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 96,000 / 43,545 |
| Engine Weight (lbs / kg) | 96,000 / 43,545 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | / 2.65 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 80 / 40 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 20" / 432x508 |
| Tractive Effort (lbs / kg) | 20,471 / 9285.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.69 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 73 / 6.78 |
| Grate Area (sq ft / m2) | 18.75 / 1.74 |
| Evaporative Heating Surface (sq ft / m2) | 870 / 80.82 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 870 / 80.82 |
| Evaporative Heating Surface/Cylinder Volume | 165.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3281 |
| Same as above plus superheater percentage | 3281 |
| Same as above but substitute firebox area for grate area | 12,775 |
| Power L1 | 2882 |
| Power MT | 132.37 |