These Mikados were certainly designed for the C & I's coal drags up and down steep gradients in western Pennsylvania. Their low drivers indicate as much, as does the location of the steam dome well back along the boiler between two sand domes. Firebox heating surface includes 25 sq ft of arch tubes.
The low drivers might have proved too small; indeed, no other standard-gauge Mike with a boiler this big had drivers of less than 63" in diameter.. Not two decades later, all three engines were sold off the property in 1930. 7 went to the S&L, 8 to General Logging Company and 9 to General Railway Equipment.
The C & I grew from the Blacklick & Yellow Creek Railroad, common-carrier outgrowth of the Vinton Lumber Company's lumber road. The C & I was incorporated in 1911. Because much of the ownership resided in one person, the C & I didn't pass out of family hands until 1950 when Bethlehem Steel bought it.
After 6 years with the C & I, this Mike went to the Clinchfield as their 498. Working in local freight and even switching service, this one-of-a-kind survived until 1951.
| Specifications | ||
|---|---|---|
| Class | 7 | K-2 |
| Locobase ID | 6456 | 6797 |
| Railroad | Cambria & Indiana | Cambria & Indiana |
| Whyte | 2-8-2 | 2-8-2 |
| Road Numbers | 7-9 | 498 |
| Gauge | Std | Std |
| Builder | Lima | Baldwin |
| Year | 1917 | 1911 |
| Valve Gear | Walschaert | Baker |
| Locomotive Length and Weight | ||
| Driver Wheelbase | 14' | 16.50' |
| Engine Wheelbase | 31.25' | 36.02' |
| Ratio of driving wheelbase to overall engine wheebase | 0.45 | 0.46 |
| Overall Wheelbase (engine & tender) | 61' | 69.12' |
| Axle Loading (Maximum Weight per Axle) | 49840 lbs | |
| Weight on Drivers | 185000 lbs | 197500 lbs |
| Engine Weight | 250000 lbs | 262500 lbs |
| Tender Light Weight | 104600 lbs | 144000 lbs |
| Total Engine and Tender Weight | 354600 lbs | 406500 lbs |
| Tender Water Capacity | 7000 gals | 8000 gals |
| Tender Fuel Capacity (oil/coal) | 14 tons | 14 tons |
| Minimum weight per yard of rail on which locomotive could run | 77.08 lb rail | 82.29 lb rail |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter | 51" | 58" |
| Boiler Pressure | 190 psi | 200 psi |
| Cylinders (dia x stroke) | 22" x 28" | 23" x 30" |
| Tractive Effort | 42915 lbs | 46516 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.31 | 4.25 |
| Heating Ability | ||
| Firebox Area | 238 sq. ft | |
| Grate Area | 63 sq. ft | 70 sq. ft |
| Evaporative Heating Surface | 3601 | 5528 |
| Superheating Surface | 865 | |
| Combined Heating Surface | 4466 | 5528 |
| Evaporative Heating Surface/Cylinder Volume | 292.31 | 383.19 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 11970 | 14000 |
| Same as above plus superheater percentage | 14288.42 | 14000 |
| Same as above but substitute firebox area for grate area | 53978.46 | 0 |
| Power L1 | 16486.77 | 0 |
| Power MT | 785.88 | 0 |
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