Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 13, p 146. Works numbers were 8261and 8266 in November 1886.
Although owned by the "Chicago & Great Western", according to the specifications page, this pair of suburban tanks operated in Wisconsin. In 1890, they were taken into the Northern Pacific and renumbered, but two years later they were redirected to the terminal railroad Chicago & Northern Pacific which became the Chicago Terminal & Transfer. At that point they fell into class B-2 and were numbered 4 & 5.
On the latter's absorption by the B & O as the Baltimore & Ohio Chicago Terminal in 1907, these were put in the R class until 5's retirement in 1913 and 4's departure in 1917.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 93 |
| Locobase ID | 2099 |
| Railroad | Wisconsin Central |
| Country | USA |
| Whyte | 2-4-4T |
| Number in Class | 2 |
| Road Numbers | 93-94/623-624 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1886 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 30.08 / 9.17 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.25 |
| Overall Wheelbase (engine & tender) (ft / m) | 30.08 / 9.17 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 60,000 / 27,216 |
| Engine Weight (lbs / kg) | 104,000 / 47,174 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1350 / 5.11 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 12,166 / 5518.41 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.93 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 187 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12 / 3.66 |
| Firebox Area (sq ft / m2) | 109.60 / 10.19 |
| Grate Area (sq ft / m2) | 17.10 / 1.59 |
| Evaporative Heating Surface (sq ft / m2) | 1285 / 119.42 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1285 / 119.42 |
| Evaporative Heating Surface/Cylinder Volume | 203.65 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2223 |
| Same as above plus superheater percentage | 2223 |
| Same as above but substitute firebox area for grate area | 14,248 |
| Power L1 | 3965 |
| Power MT | 291.38 |