Although Schenectady originally delivered this engine in 1897, snags and delays prevented actual testing of the effect of higher pressures on economy and performance until a grant was awarded in 1904 by the Carnegie Institute. This locomotive then was thoroughly tested.
Results indicated that as a saturated-steam locomotive boiler was pressed beyond 200 pounds, the percentage decrease in consumption as pressure increased was less than a commensurate increase at lower pressures. In other words, boiler pressure represented the same kind of barrier to increased economy in locomotive boilers as did the speed of sound to aircraft in a later decade. The solution for locomotives would lie in superheating the steam, which was just then taking hold in several countries around the world.
| Specifications | |
|---|---|
| Class | 2 |
| Locobase ID | 8402 |
| Railroad | Schenectady |
| Whyte | 4-4-0 |
| Road Numbers | 2 |
| Gauge | Std |
| Builder | Schenectady |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 8.50' |
| Engine Wheelbase | 23' |
| Ratio of driving wheelbase to overall engine wheebase | 0.37 |
| Overall Wheelbase (engine & tender) | |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 61000 lbs |
| Engine Weight | 109000 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 190400 lbs |
| Tender Water Capacity | |
| Tender Fuel Capacity (oil/coal) | |
| Minimum weight per yard of rail on which locomotive could run | 51 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69.50" |
| Boiler Pressure | 240 psi |
| Cylinders (dia x stroke) | 16" x 24" |
| Tractive Effort | 18034 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.38 |
| Heating Ability | |
| Firebox Area | 126 sq. ft |
| Grate Area | 17 sq. ft |
| Evaporative Heating Surface | 1322 |
| Superheating Surface | |
| Combined Heating Surface | 1322 |
| Evaporative Heating Surface/Cylinder Volume | 236.70 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4080 |
| Same as above plus superheater percentage | 4080 |
| Same as above but substitute firebox area for grate area | 30240 |
| Power L1 | 9716 |
| Power MT | 702.30 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |