Henderson-Waits 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 37 (Locobase 14704)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 62, pp. 355+. Works numbers were 52936 in January 1920 and 52984 in February.

Wood-burning logging Prairies weren't uncommon in the southeast. The specs for this pair also describe a typical working environment: "Rough track", "short grades of 6%" and "prevailing grades of 1% to 3%". Florida temperatures were acknowledged through the provision of a "large and roomy" cab with ventilators in the roof and large windows.

This pair served H-W and later Brown Florida Lumber.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,704
Number in Class2
Road Numbers37-38
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.25 / 3.12
Engine Wheelbase (ft / m)26.83 / 8.18
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft / m)50.54 / 15.40
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)92,400 / 41,912
Engine Weight (lbs / kg)120,800 / 54,794
Tender Loaded Weight (lbs / kg)90,000 / 40,823
Total Engine and Tender Weight (lbs / kg)210,800 / 95,617
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)51 / 25.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)22,778 / 10331.94
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area (sq ft / m2)121 / 11.24
Grate Area (sq ft / m2)18.20 / 1.69
Evaporative Heating Surface (sq ft / m2)1552 / 144.18
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1552 / 144.18
Evaporative Heating Surface/Cylinder Volume246.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3094
Same as above plus superheater percentage3094
Same as above but substitute firebox area for grate area20,570
Power L14265
Power MT305.28

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