2-8-2 "Mikado" Steam Locomotives in the USA

McCloud River


Class Details by Steve Llanso of Sweat House Media

Class 14 (Locobase 13046)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 249. See also Raymond Piltz, "Lumbering Mikes: A Hogger on the McCloud River Railroad Takes a Fond Look at Baldwin's Timber-Hauling 90-Ton Mikados." Railroad History, no. 196 (2007): 58-64. [] . Works numbers were 30850-30851 in May 1907.

A later sister was delivered with a superheater; see Locobase 13047. Raymond Piltz noted that the 14 & 15 each received a superheater

Principal Dimensions by Steve Llanso of Middle Run Media
Class14
Locobase ID13046
RailroadMcCloud River
CountryUSA
Whyte2-8-2
Number in Class2
Road Numbers14-15
GaugeStd
Number Built2
BuilderBurnham, Williams & Co
Year1907
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.08 / 3.99
Engine Wheelbase (ft / m)27 / 8.23
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)143,000 / 64,864
Engine Weight (lbs / kg)179,000 / 81,193
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)259,000 / 117,480
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2800 / 10,598
Minimum weight of rail (calculated) (lb/yd / kg/m)60 / 30
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x711
Tractive Effort (lbs / kg)35,700 / 16193.27
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01
Heating Ability
Tubes (number - dia) (in / mm)350 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)16.50 / 5.03
Firebox Area (sq ft / m2)148 / 13.75
Grate Area (sq ft / m2)41.50 / 3.86
Evaporative Heating Surface (sq ft / m2)3156 / 293.31
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)3156 / 293.31
Evaporative Heating Surface/Cylinder Volume310.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7470
Same as above plus superheater percentage7470
Same as above but substitute firebox area for grate area26,640
Power L15511
Power MT339.85

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