Litchfield & Madison 2-8-2 "Mikado" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 157 (Locobase 6289)
Data from builder's specs published on [
] (4 August 2004). Firebox heating surface included 27 sq ft of arch tubes. Works numbers were 64420, 64911-64913 in August 1923 and 68549-68550 in February 1931.
The website for the Chicago & North Western Railway Historical Society -- [
] -- says that the L&M measured about 68 miles in length and ran from Benld to Madison near St Louis. The shops and offices were at Edwardsville, Illinois. It moved coal, products from Madison, and bridged the C&NW traffic.
As can be seen from the specs, these Mikes were not meant for high-speed service and probably constituted the bulk of modern power on the line; in fact they had the smallest drivers of any US Mikado on a standard-gauge, common-carrier line. After the first three were delivered in 1923, two more (160-161) followed in 1931 to the exact same specs other than slightly higher weights.Of the class, the leader -- 157 -- was the last to be retired.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 157 |
| Locobase ID | 6289 |
| Railroad | Litchfield & Madison |
| Country | USA |
| Whyte | 2-8-2 |
| Number in Class | 5 |
| Road Numbers | 157-161 |
| Gauge | Std |
| Number Built | 5 |
| Builder | Alco-Schenectady |
| Year | 1923 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15 / 4.57 |
| Engine Wheelbase (ft / m) | 33.58 / 10.24 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 67.25 / 20.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 219,000 / 99,337 |
| Engine Weight (lbs / kg) | 274,000 / 124,284 |
| Tender Loaded Weight (lbs / kg) | 168,000 / 76,204 |
| Total Engine and Tender Weight (lbs / kg) | 442,000 / 200,488 |
| Tender Water Capacity (gals / ML) | 9000 / 34.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 14 / 13 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 91 / 45.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55 / 1397 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 25" x 30" / 635x762 |
| Tractive Effort (lbs / kg) | 55,057 / 24973.46 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.98 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 219 - 2" / 51 |
| Flues (number - dia) (in / mm) | 38 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 19.25 / 5.87 |
| Firebox Area (sq ft / m2) | 233 / 21.65 |
| Grate Area (sq ft / m2) | 66.80 / 6.21 |
| Evaporative Heating Surface (sq ft / m2) | 3464 / 321.93 |
| Superheating Surface (sq ft / m2) | 902 / 83.83 |
| Combined Heating Surface (sq ft / m2) | 4366 / 405.76 |
| Evaporative Heating Surface/Cylinder Volume | 203.29 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 12,692 |
| Same as above plus superheater percentage | 15,357 |
| Same as above but substitute firebox area for grate area | 53,567 |
| Power L1 | 13,029 |
| Power MT | 524.64 |