Youngstown & Ohio River 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13698)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 36, p. 14. Works number was 35780 in December 1910.

Although a little lighter than the 1904 Woodward Iron Mike shown in Locobase 12693, this was essentially the same design. The Y & OR RR was an electric interurban line that interchanged freight with several railroads. For that service, they needed a small freight engine and this one operated for about seven years, at which point two Baldwin-Westinghouse steeple-cab electrics replaced it.

In 1917, the 1 was sold to the Hetch Hetchy Railroad, which served the effort to build the San Francisco Dam then under construction. (See Robert Righter, The battle over Hetch Hetchy: America's most controversial dam (New York: Oxford University Press, 2005)). In 1927, the 1 went to the California & Oregon Coast as their #301. After decades of service, the 301 was scrapped in 1950.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID13698
RailroadYoungstown & Ohio River
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)25.67 / 7.82
Ratio of driving wheelbase to overall engine wheelbase 0.47
Overall Wheelbase (engine & tender) (ft / m)53.37 / 16.27
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)131,000 / 59,421
Engine Weight (lbs / kg)167,000 / 75,750
Tender Loaded Weight (lbs / kg)120,000 / 54,431
Total Engine and Tender Weight (lbs / kg)287,000 / 130,181
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)8 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)21" x 24" / 533x610
Tractive Effort (lbs / kg)35,203 / 15967.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.72
Heating Ability
Tubes (number - dia) (in / mm)322 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.83 / 4.22
Firebox Area (sq ft / m2)187 / 17.37
Grate Area (sq ft / m2)33 / 3.07
Evaporative Heating Surface (sq ft / m2)2505 / 232.72
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2505 / 232.72
Evaporative Heating Surface/Cylinder Volume260.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5940
Same as above plus superheater percentage5940
Same as above but substitute firebox area for grate area33,660
Power L14935
Power MT332.21

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