Early Clover Leaf Eight-wheelers that had lasted in service long enough to be taken into the Nickel Plate and renumbered. Locobase believes that other members of the class had been disposed of before the merger and that these two did not outlast the jointure for long.
Another note: the 1924 document records the original purchase price as $8,500 in 1887 dollars. Boiler horsepower is given as 709 HP, while the cylinders were credited with 866 HP.
| Specifications | |
|---|---|
| Class | D-9 |
| Locobase ID | 6712 |
| Railroad | Toledo, St Louis & Western (NKP) |
| Whyte | 4-4-0 |
| Road Numbers | 31, 33 / 791, 793 |
| Gauge | Std |
| Builder | Rhode Island |
| Year | 1887 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 8.58' |
| Engine Wheelbase | 22.49' |
| Ratio of driving wheelbase to overall engine wheebase | 0.38 |
| Overall Wheelbase (engine & tender) | 48.16' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 64000 lbs |
| Engine Weight | 99000 lbs |
| Tender Light Weight | 108000 lbs |
| Total Engine and Tender Weight | 207000 lbs |
| Tender Water Capacity | 4000 gals |
| Tender Fuel Capacity (oil/coal) | 14 tons |
| Minimum weight per yard of rail on which locomotive could run | 53 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69" |
| Boiler Pressure | 180 psi |
| Cylinders (dia x stroke) | 17" x 24" |
| Tractive Effort | 15380 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.16 |
| Heating Ability | |
| Firebox Area | 121 sq. ft |
| Grate Area | 17.90 sq. ft |
| Evaporative Heating Surface | 1407 |
| Superheating Surface | |
| Combined Heating Surface | 1407 |
| Evaporative Heating Surface/Cylinder Volume | 223.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3222 |
| Same as above plus superheater percentage | 3222 |
| Same as above but substitute firebox area for grate area | 21780 |
| Power L1 | 6606 |
| Power MT | 455.12 |
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