These two Rhodies differed from the batch of 10 delivered a couple of years earlier in having a slightly larger grate and 4 fewer tubes.
A trio delivered to the Ashland a few years after the first couple of batches, these were smaller and lighter.
| Specifications | |||
|---|---|---|---|
| Class | I-1 | I-2 | I-4 |
| Locobase ID | 7550 | 7551 | 7552 |
| Railroad | Ashland / M LS & W (C&NW) | Ashland / M LS & W (C&NW) | Ashland / M LS & W (C&NW) |
| Whyte | 2-6-0 | 2-6-0 | 2-6-0 |
| Road Numbers | 920, 930-32, 951, 1002-06 | 929, 1012 | 992-993, 996 |
| Gauge | Std | Std | Std |
| Builder | Rhode Island | Rhode Island | Rhode Island |
| Year | 1890 | 1891 | 1887 |
| Valve Gear | Stephenson | Stephenson | Stephenson |
| Locomotive Length and Weight | |||
| Driver Wheelbase | 15.25' | 15.25' | 14.75' |
| Engine Wheelbase | 22.75' | 22.75' | 22.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.67 | 0.67 | 0.66 |
| Overall Wheelbase (engine & tender) | 44' | 44' | 43.42' |
| Axle Loading (Maximum Weight per Axle) | |||
| Weight on Drivers | 89100 lbs | 88100 lbs | 86000 lbs |
| Engine Weight | 103500 lbs | 103500 lbs | 98000 lbs |
| Tender Light Weight | 66800 lbs | 66800 lbs | |
| Total Engine and Tender Weight | 170300 lbs | 170300 lbs | 0 |
| Tender Water Capacity | 3500 gals | 3500 gals | 3000 gals |
| Tender Fuel Capacity (oil/coal) | 8 tons | 8 tons | 7 tons |
| Minimum weight per yard of rail on which locomotive could run | 49.50 lb rail | 48.94 lb rail | 47.78 lb rail |
| Geometry Relating to Tractive Effort | |||
| Driver Diameter | 59" | 59" | 59" |
| Boiler Pressure | 165 psi | 165 psi | 150 psi |
| Cylinders (dia x stroke) | 18" x 24" | 18" x 24" | 18" x 24" |
| Tractive Effort | 18484 lbs | 18484 lbs | 16804 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.82 | 4.77 | 5.12 |
| Heating Ability | |||
| Firebox Area | |||
| Grate Area | 18.96 sq. ft | 19.30 sq. ft | 17.50 sq. ft |
| Evaporative Heating Surface | |||
| Superheating Surface | |||
| Combined Heating Surface | 0 | 0 | 0 |
| Evaporative Heating Surface/Cylinder Volume | |||
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 3128.40 | 3184.50 | 2625 |
| Same as above plus superheater percentage | 3128.40 | 3184.50 | 2625 |
| Same as above but substitute firebox area for grate area | 0 | 0 | 0 |
| Power L1 | 0 | 0 | 0 |
| Power MT | 0 | 0 | 0 |
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