Data from 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works number was 2210 in June 1889.
The locomotive diagram shows a dock switcher with a long boiler on which little sand domes flanked a taller steam dome -- all of them shaped like milk cans. It seems to have been intended for bi-directional operation.
The SW&T sold the 1 to locomotive rebuilder/reseller Southern Iron & Equipment in 1901. SI&E sold it to the Northern Pacific in October 1903.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1/H-4 |
| Locobase ID | 8152 |
| Railroad | Seattle Warehouse & Terminal (NP) |
| Country | USA |
| Whyte | 0-4-4T |
| Number in Class | 1 |
| Road Numbers | 1/1071 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Rhode Island |
| Year | 1889 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6 / 1.83 |
| Engine Wheelbase (ft / m) | 20 / 6.10 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.30 |
| Overall Wheelbase (engine & tender) (ft / m) | 20 / 6.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 50,500 / 22,906 |
| Engine Weight (lbs / kg) | 76,000 / 34,473 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 800 / 3.03 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
| Tractive Effort (lbs / kg) | 9718 / 4408.02 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.20 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 100 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.63 / 2.94 |
| Firebox Area (sq ft / m2) | 63 / 5.86 |
| Grate Area (sq ft / m2) | 11.88 / 1.10 |
| Evaporative Heating Surface (sq ft / m2) | 564 / 52.42 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 564 / 52.42 |
| Evaporative Heating Surface/Cylinder Volume | 158.43 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1663 |
| Same as above plus superheater percentage | 1663 |
| Same as above but substitute firebox area for grate area | 8820 |
| Power L1 | 2765 |
| Power MT | 241.42 |