Baltimore & Ohio 0-10-0 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class U (Locobase 14986)

See also Baltimore & Ohio to 1954 Assorted Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Many thanks to Chris Hohl for inquiring about this class in February 2013 and causing this entry to be drafted.)

The Big Six Santa Fes that the B&O bought from Baldwin in 1914 (Locobase 1036) mostly served as road freight engines throughout their careers. Two of them--6009 and 6030--took a different route, however, when they were converted to mighty ten-wheel switcher/pusher engines at the company's shops in the mid-1920s.

The modfications entailed much more than simply removing each truck. Indeed, the only dimensions that remained the same were the cylinder volume, driver diameter, and wheelbase. A new boiler shorter by 25% and pressed to a higher degree provided the steam from water heated in a smaller firebox. Axle loading increased, a useful change in heavy switcher.

As North American 0-10-0s went, these were not big engines, but in anybody's book, they were massive switchers.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,986
RailroadBaltimore & Ohio (B&O)
Number in Class2
Road Numbers950-951
Number Built
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)21 / 6.40
Engine Wheelbase (ft / m)21 / 6.40
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft / m)66 / 20.12
Axle Loading (Maximum Weight per Axle) (lbs / kg)71,720 / 32,532
Weight on Drivers (lbs / kg)349,500 / 158,531
Engine Weight (lbs / kg)349,500 / 158,531
Tender Loaded Weight (lbs / kg)206,100 / 93,485
Total Engine and Tender Weight (lbs / kg)555,600 / 252,016
Tender Water Capacity (gals / ML)12,000 / 45.45
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)15 / 13.60
Minimum weight of rail (calculated) (lb/yd / kg/m)117 / 58.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)58 / 1473
Boiler Pressure (psi / kPa)225 / 15.50
High Pressure Cylinders (dia x stroke) (in / mm)30" x 32" / 762x813
Tractive Effort (lbs / kg)94,966 / 43075.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.68
Heating Ability
Firebox Area (sq ft / m2)294 / 27.31
Grate Area (sq ft / m2)70 / 6.50
Evaporative Heating Surface (sq ft / m2)3595 / 333.98
Superheating Surface (sq ft / m2)849 / 78.87
Combined Heating Surface (sq ft / m2)4444 / 412.85
Evaporative Heating Surface/Cylinder Volume137.32
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15,750
Same as above plus superheater percentage18,743
Same as above but substitute firebox area for grate area78,719
Power L110,556
Power MT332.93

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