Winston-Salem Southbound 2-8-2 "Mikado" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class M-2 (Locobase 15337)

Data from DeGolyer, Vol 75, pp. 81+. See Locobase 15337 for a description the WSS. Works numbers were 58380-58381 in May 1925.

WSS bought this pair of Mikados that were very similar to the Atlantic Coast Line Q-1s built during the same period. They rolled on 85 lb/yard (42.5 kg/metre) rail and faced only 0.6% grades and almost no curves at all (max curvature 3 degrees). The Mikes had 12" (305 mm) piston valves.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15,337
RailroadWinston-Salem Southbound
Number in Class2
Road Numbers300-301
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)16.75 / 5.11
Engine Wheelbase (ft / m)35 / 10.67
Ratio of driving wheelbase to overall engine wheebase 0.48
Overall Wheelbase (engine & tender) (ft / m)71.17 / 21.55
Axle Loading (Maximum Weight per Axle) (lbs / kg) / 26,363
Weight on Drivers (lbs / kg)232,500 / 105,429
Engine Weight (lbs / kg)295,000 / 133,824
Tender Loaded Weight (lbs / kg)188,500 / 85,275
Total Engine and Tender Weight (lbs / kg)483,500 / 219,099
Tender Water Capacity (gals / ML)10,000 / 37.88
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)16 / 12.70
Minimum weight of rail (calculated) (lb/yd)97
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1626
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)27" x 30" / 686x762
Tractive Effort (lbs / kg)59,014 / 26768.33
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94
Heating Ability
Firebox Area (sq ft / m2)353 / 32.70
Grate Area (sq ft / m2)73.50 / 6.78
Evaporative Heating Surface (sq ft / m2)3248 / 301.75
Superheating Surface (sq ft / m2)718 / 68.93
Combined Heating Surface (sq ft / m2)3966 / 370.68
Evaporative Heating Surface/Cylinder Volume163.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation14,700
Same as above plus superheater percentage17,346
Same as above but substitute firebox area for grate area83,308
Power L112,121
Power MT459.74