Midland Railway 4-6-0 "Ten-wheeler" Locomotives of 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.)

Specifications by Steve Llanso of Sweat House Media
Class101
Locobase ID14,678
RailroadMidland Railway
CountryUSA
Whyte4-6-0
Number in Class3
Road Numbers101-103
GaugeStd
Number Built3
BuilderBaldwin
Year1919
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.83
Engine Wheelbase (ft)22.98
Ratio of driving wheelbase to overall engine wheebase 0.56
Overall Wheelbase (engine & tender) (ft)48.52
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)73,000
Engine Weight (lbs)98,000
Tender Loaded Weight (lbs)80,000
Total Engine and Tender Weight (lbs)178,000
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)1700
Minimum weight of rail (calculated) (lb/yd)41
Geometry Relating to Tractive Effort
Driver Diameter (in)56
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)16,786
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.35
Heating Ability
Firebox Area (sq ft)90
Grate Area (sq ft)15.50
Evaporative Heating Surface (sq ft)1222
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1222
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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