Salem, Winona & Southern 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 15323)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 73, pp. 409+. Works number was 58446 in May 1925.

Current River Lumber Company bought this engine, but the SW&S was incorporated on 21 May 1908 to acquire and lease the railroad of the Missouri Lumber & Mining Company in Shannon County, Mo. When the ICC drew up its valuation of the SW&S in the mid-19teens, the lease covered only the 13.3 miles (21.4 km) between Winona Junction and West Eminence, but trackage rights ran from West Eminence to Horse Hollow, 5.6 miles (9 km) further along.

The 101 was a logging Mikado with piston valves (10"/203 mm), but fitted with a relatively large saturated boiler. The specifications noted a 5% ruling grade and stated that the 101 was to be "laid out so as to traverse sharp curves, such as are common on logging roads,i.e. 25 degrees." Also noted was the not-uncommon stipulation that the driving boxes, springs, and spring hangers were to be "extra heavy, for operation on very rough track."

By the late 1920s, the SW&S had sold the 101 to locomotive rebuilder/reseller Birmingham Rail & Locomotive, which sold it in February 1929 to Brooklyn Cooperage Company of Sumter, SC. BCC doubled the road number to 202. The engine went through two more owners--Sumter Lumber Company, also in Sumter, and Esdorn Lumber Company--before being scrapped in 1955.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15323
RailroadSalem, Winona & Southern
Number in Class1
Road Numbers101
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.50 / 4.11
Engine Wheelbase (ft / m)29 / 8.84
Ratio of driving wheelbase to overall engine wheelbase 0.47
Overall Wheelbase (engine & tender) (ft / m)55.21 / 16.83
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)118,000 / 53,524
Engine Weight (lbs / kg)153,000 / 69,400
Tender Loaded Weight (lbs / kg)105,500 / 47,854
Total Engine and Tender Weight (lbs / kg)258,500 / 117,254
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)8 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)28,817 / 13071.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.09
Heating Ability
Tubes (number - dia) (in / mm)332 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13 / 3.96
Firebox Area (sq ft / m2)155 / 14.40
Grate Area (sq ft / m2)29 / 2.69
Evaporative Heating Surface (sq ft / m2)2401 / 223.06
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2401 / 223.06
Evaporative Heating Surface/Cylinder Volume304.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5220
Same as above plus superheater percentage5220
Same as above but substitute firebox area for grate area27,900
Power L15562
Power MT415.66

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Wes Barris