Frost-Johnson Lumber Company 2-8-2 "Mikado" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 45 (Locobase 14945)

Data from DeGolyer, Volume 65, pp. 126+. Works number was 56726 in June 1923.

One of the first non wood-burners on the F-J system, the 45 burned oil instead. Moreover, since the engine was superheated, the design adopted 10" (254 mm) piston valves for steam admission.

Specifications by Steve Llanso of Sweat House Media
Class45
Locobase ID14,945
RailroadFrost-Johnson Lumber Company
CountryUSA
Whyte2-8-2
Number in Class1
Road Numbers45
GaugeStd
Number Built1
BuilderBaldwin
Year1923
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.50 / 4.11
Engine Wheelbase (ft / m)29 / 8.84
Ratio of driving wheelbase to overall engine wheebase 0.47
Overall Wheelbase (engine & tender) (ft / m)54.79 / 16.70
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)118,000 / 53,524
Engine Weight (lbs / kg)149,000 / 67,585
Tender Loaded Weight (lbs / kg)98,000 / 44,452
Total Engine and Tender Weight (lbs / kg)247,000 / 112,037
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1800 / 6.80
Minimum weight of rail (calculated) (lb/yd)49
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)19" x 24" / 483x610
Tractive Effort (lbs / kg)28,817 / 13071.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.09
Heating Ability
Firebox Area (sq ft / m2)154 / 14.31
Grate Area (sq ft / m2)29 / 2.69
Evaporative Heating Surface (sq ft / m2)1651 / 153.38
Superheating Surface (sq ft / m2)373 / 34.65
Combined Heating Surface (sq ft / m2)2024 / 188.03
Evaporative Heating Surface/Cylinder Volume209.63
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5220
Same as above plus superheater percentage6160
Same as above but substitute firebox area for grate area32,710
Power L110,124
Power MT756.60