Wilson Cypress Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14039)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 45, p. 24. Works number was 41130 in January 1914.

After the Wilsons had bought local lumber operations from the Tilghmans in Palatka, Fla, they put down a logging camp at nearby Sunday Bluff. Their first motive power was a stud of 0-4-4T Forneys that formerly pulled trains on the New York Elevated. Within a decade and in the years when the Wilson Cypress Company was harvesting over one billion feet of timber per year, it bought this logging Prairie to help move the goods.

! By 1926 the Wilson Cypress Company had become one of the largest lumber manufactures in the world.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14039
RailroadWilson Cypress Company
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.83 / 2.39
Engine Wheelbase (ft / m)20.58 / 6.27
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)39.77 / 12.12
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)40,000 / 18,144
Engine Weight (lbs / kg)55,000 / 24,948
Tender Loaded Weight (lbs / kg)40,000 / 18,144
Total Engine and Tender Weight (lbs / kg)95,000 / 43,092
Tender Water Capacity (gals / ML)2000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x406
Tractive Effort (lbs / kg)9792 / 4441.58
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Tubes (number - dia) (in / mm)72 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.08 / 3.07
Firebox Area (sq ft / m2)56 / 5.20
Grate Area (sq ft / m2)14 / 1.30
Evaporative Heating Surface (sq ft / m2)433 / 40.23
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)433 / 40.23
Evaporative Heating Surface/Cylinder Volume207.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2520
Same as above plus superheater percentage2520
Same as above but substitute firebox area for grate area10,080
Power L13684
Power MT609.14

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