Henderson-Waits 2-6-2 "Prairie" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14704
Number in Class2
Road Numbers37-38
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.25'
Engine Wheelbase26.83'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)50.54'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers92400 lbs
Engine Weight120800 lbs
Tender Light Weight90000 lbs
Total Engine and Tender Weight210800 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)51 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure170 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort22778 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area121 sq. ft
Grate Area18.20 sq. ft
Evaporative Heating Surface1552 sq. ft
Superheating Surface
Combined Heating Surface1552 sq. ft
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 area20570
Power L14265
Power MT305.28

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