Midland Railway 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 14678)

Data from DeGolyer, Volume 62, pp. 72. Works numbers were 52661, 52686, 52722 in December 1919.

A number of short lines bought Baldwin Ten-wheelers in this size over the years. Driver diameters clustered at two sizes--50" (1,270 mm) for freight or logging, 56" (1,422 mm) if the engine operated as all-purpose, mixed-train motive power. Locobase still hasn't pinned down just where this Midland Railway was in the US, but can say that it used 40 lb/yard (20 kg/metre) rail and that the locomotives burned oil.

Georgia Car & Locomotive bought all three engines from the MR within a few years of their delivery to the Midland. 101 went to the Wilmington, Brunswick & Southern in North Carolina. 102-103 were sold to Kirby Lumber of Silsbee, Tex as their 93 and 92, respectively.

(For more on the WB&S, see North Carolina Rails' account at http://www.carolana.com/NC/Transportation/railroads/nc_rrs_wilmington_brunswick_southern.html.)

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,678
RailroadMidland Railway
Number in Class3
Road Numbers101-103
Number Built3
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.83 / 3.91
Engine Wheelbase (ft / m)22.98 / 7
Ratio of driving wheelbase to overall engine wheebase 0.56
Overall Wheelbase (engine & tender) (ft / m)48.52 / 14.79
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)73,000 / 33,112
Engine Weight (lbs / kg)98,000 / 44,452
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)178,000 / 80,739
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1700 / 6.40
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)16,786 / 7614.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.35
Heating Ability
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)15.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1222 / 113.53
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1222 / 113.53
Evaporative Heating Surface/Cylinder Volume218.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2790
Same as above plus superheater percentage2790
Same as above but substitute firebox area for grate area16,200
Power L15029
Power MT455.63

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