Tall express Eight-wheeler quartet that went into service pulling the fast expresses that linked Indianapolis and St Louis "...and they are gaining," said the R&LE's correspondent, "a high reputation for the efficient way in which they do the required work ...we understand that they went into service with exceptionally small trouble from the annoyances common to the breaking-in process."
| Specifications | |
|---|---|
| Class | D26a |
| Locobase ID | 9507 |
| Railroad | Vandalia Line |
| Whyte | 4-4-0 |
| Road Numbers | |
| Gauge | Std |
| Builder | Schenectady |
| Year | 1899 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 8.50' |
| Engine Wheelbase | 24.42' |
| Ratio of driving wheelbase to overall engine wheebase | 0.35 |
| Overall Wheelbase (engine & tender) | 52.21' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 85800 lbs |
| Engine Weight | 132300 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 244000 lbs |
| Tender Water Capacity | 6000 gals |
| Tender Fuel Capacity (oil/coal) | 10 tons |
| Minimum weight per yard of rail on which locomotive could run | 72 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 78" |
| Boiler Pressure | 190 psi |
| Cylinders (dia x stroke) | 20" x 26" |
| Tractive Effort | 21533 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.98 |
| Heating Ability | |
| Firebox Area | 175 sq. ft |
| Grate Area | 30 sq. ft |
| Evaporative Heating Surface | 2241 |
| Superheating Surface | |
| Combined Heating Surface | 2241 |
| Evaporative Heating Surface/Cylinder Volume | 237.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5700 |
| Same as above plus superheater percentage | 5700 |
| Same as above but substitute firebox area for grate area | 33250 |
| Power L1 | 8141 |
| Power MT | 418.36 |
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