Alaska Railroad 0-4-2 Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class A1 (Locobase 14135)
Data from [
] (visited 12 May 2012) Works number was 47317 in July 1910.
The Alaska rails site gives the working pressure as 165 psi and the tractive effort as 15,350 lb (6,962 kg), which required a working pressure of 185 psi to achieve. The boiler's principal water supply lay as a saddle over the boiler (thus, a saddle tanker), but the engine also trailed a tender
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | A1 |
| Locobase ID | 14135 |
| Railroad | Alaska Railroad |
| Country | USA |
| Whyte | 0-4-2ST |
| Number in Class | 1 |
| Road Numbers | 1 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Alco-Rogers |
| Year | 1910 |
| Valve Gear | link |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 14.92 / 4.55 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.47 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.92 / 4.55 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 37,000 / 16,783 |
| Weight on Drivers (lbs / kg) | 71,000 / 32,205 |
| Engine Weight (lbs / kg) | 82,000 / 37,195 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1700 / 6.44 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 165 / 1140 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Tractive Effort (lbs / kg) | 13,745 / 6234.63 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.17 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 106 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.67 / 3.56 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 650 / 60.39 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 650 / 60.39 |
| Evaporative Heating Surface/Cylinder Volume | 165.82 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |