Data from Lake Superior & Ishpeming locomotive diagram book supplied in July 2022 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 52836-52837 in 1913.
Powerful enough when originally procured, the engines increased their effectiveness with several modifications later on. After the update, firebox heating surface area included 84.5 sq ft (7.85 sq m) in two thermic syphons and arch tubes. Coal burned on a rosebud grate. Further efficiency came from a Worthington feed water heater..
At the time these two Consolidations came on the line, the CR&I operated 33 miles of trackage in the Chicago area as well as a car float on the namesake river. It was a belt railroad that, with the Chicago Junction, were the only two belt-line railroads to provide direct interchange of rail-and-lake freight.
operated independently from its start to 16 May 1922, when the Interstate Commerce Commission authorized its purchase by the New York Central system. Its lease of the Chicago Junction at the same time ensured NYC's access to Chicago's stockyards.
Under the NYC umbrella, the CR&I operated semi-independently throughout the steam era. Its affiliation with the Chicago Junction led the CR&I to send these two to the CJ as their 1 and 2. In 1925, the CJ sold the two to the Lake Superior & Ishpeming as their class SC-2.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | G-47 |
| Locobase ID | 16594 |
| Railroad | Chicago River & Indiana |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 2 |
| Road Numbers | 200-201/1-2 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Alco-Schenectady |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 17.50 / 5.33 |
| Engine Wheelbase (ft / m) | 26.42 / 8.05 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.66 |
| Overall Wheelbase (engine & tender) (ft / m) | 61.06 / 18.61 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 217,500 / 98,656 |
| Engine Weight (lbs / kg) | 244,500 / 110,903 |
| Tender Loaded Weight (lbs / kg) | 122,200 / 55,429 |
| Total Engine and Tender Weight (lbs / kg) | 366,700 / 166,332 |
| Tender Water Capacity (gals / ML) | 8000 / 30.30 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 13 / 12 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 91 / 45.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 25" x 32" / 635x813 |
| Tractive Effort (lbs / kg) | 53,833 / 24418.27 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 250 - 2" / 51 |
| Flues (number - dia) (in / mm) | 38 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 15 / 4.57 |
| Firebox Area (sq ft / m2) | 276.50 / 25.69 |
| Grate Area (sq ft / m2) | 55 / 5.11 |
| Evaporative Heating Surface (sq ft / m2) | 3042 / 282.61 |
| Superheating Surface (sq ft / m2) | 678 / 62.99 |
| Combined Heating Surface (sq ft / m2) | 3720 / 345.60 |
| Evaporative Heating Surface/Cylinder Volume | 167.33 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 10,450 |
| Same as above plus superheater percentage | 12,331 |
| Same as above but substitute firebox area for grate area | 61,991 |
| Power L1 | 11,001 |
| Power MT | 446.03 |