Mobile & Ohio 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 540 (Locobase 5428)

Data on table in May 1916 issue of RME. (Southern's locomotive diagram 26-F-29, dated September 5, 1918 shows slightly different data for the heating surfaces:

54 sq ft for the grate

185 sq ft for the firebox heating surface

2,601 sq ft for the evaporative heating surface.) Also see DeGolyer, Vol 50, pp. 326+.

This was the sole set of Consolidations bought by the M & O while it was under the Southern's overall control. Eight of these came from Alco's Richmond plant and seven from Baldwin.

Drury (1993) comments that these were not popular with their crews: "The firebox, about the same size as that of the 2-8-2, required that the boiler be mounted higher to clear the rear drivers, and the rear pair of drivers tended to derail." Not only were no more 2-8-0s purchased, but 2/3 of those already owned were scrapped by 1940.

Specifications by Steve Llanso of Sweat House Media
Locobase ID5428
RailroadMobile & Ohio (GM&O)
Number in Class15
Road Numbers540-554
Number Built15
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase16.50'
Engine Wheelbase25.08'
Ratio of driving wheelbase to overall engine wheebase 0.66
Overall Wheelbase (engine & tender)61.50'
Axle Loading (Maximum Weight per Axle)49200 lbs
Weight on Drivers196000 lbs
Engine Weight220000 lbs
Tender Light Weight151000 lbs
Total Engine and Tender Weight371000 lbs
Tender Water Capacity7500 gals
Tender Fuel Capacity (oil/coal)12 tons
Minimum weight of rail (calculated)82 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure190 psi
Cylinders (dia x stroke)24" x 30"
Tractive Effort44297 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.42
Heating Ability
Firebox Area180 sq. ft
Grate Area53.30 sq. ft
Evaporative Heating Surface2579 sq. ft
Superheating Surface557 sq. ft
Combined Heating Surface3136 sq. ft
Evaporative Heating Surface/Cylinder Volume164.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10127
Same as above plus superheater percentage11950
Same as above but substitute firebox area for grate area40356
Power L110785
Power MT485.24

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