Mobile & Ohio 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 136 (Locobase 6285)

Data from table supplied by Allen Stanley in March 2004 and diagrams from M&O 7 -1925 Locomotive Diagrams supplied by Stanley in May 2005. See also "Rogers Ten Wheeler for Mobile & Ohio," Locomotive Engineering, Volume 13, No 2 (February 1899). Rogers actually delivered two versions that seem to have differed only in driver diameter. Out of the 90, only 20 had mixed-traffic driver dimensions.

Works numbers were 5247-5251 in March 1898 (road 136-140 and later 200-204),

5329-5338 in November 1898 (road 143-152, later 205-214), and 5474-5478 in November 1899 (road 178-182, later 215-219).

The handsome lines of this mixed-traffic Ten-wheeler were spoiled to some extent by a clerestory "mohawk" in the center of the cab roof.

Most of the class was withdrawn and scrapped in the late 1920s and early 1930s.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6285
RailroadMobile & Ohio
Number in Class20
Road Numbers136-140, 143-52, 178-182
Number Built20
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase12'
Engine Wheelbase22.25'
Ratio of driving wheelbase to overall engine wheebase 0.54
Overall Wheelbase (engine & tender)48.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers103200 lbs
Engine Weight129000 lbs
Tender Light Weight93000 lbs
Total Engine and Tender Weight222000 lbs
Tender Water Capacity4000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)57 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 26"
Tractive Effort20458 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.04
Heating Ability
Firebox Area156.75 sq. ft
Grate Area25 sq. ft
Evaporative Heating Surface1845 sq. ft
Superheating Surface
Combined Heating Surface1845 sq. ft
Evaporative Heating Surface/Cylinder Volume240.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4500
Same as above plus superheater percentage4500
Same as above but substitute firebox area for grate area28215
Power L16488
Power MT415.80

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