Hampton & Branchville 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 33 (Locobase 14159)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 48, p. 293 and Vol 53, p. 13. Works numbers were 40621 in September 1913 and 45290 in March 1917.

Shortline H&B ran over 24 miles (38.6 km) of "30, 35, and 40 lb/yard (15, 17.5, 20 kg/metre) rail" (according to the specifications) in the Geechie section of South Carolina's coastal plain, which held swamps and pinewoods. The latter were harvested for lumber and pitch to convert to turpentine. The road curved in an arc that ranged northeast across the Atlantic Coast Line bending southeast on its way to Smoaks. Tracks extended another 25 miles (40.25 km) south to Cottageville, which lay directly east of Hampton.

The H&B was owned by the Lightsey Brothers, whose headquarters could be found at 1 Lightsey Street, Hampton, SC.

These two wood-burning logging Prairies apparently served the H&B for their entire careers.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,159
RailroadHampton & Branchville
Number in Class2
Road Numbers33, 55
Number Built2
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 wheebase 0.38
Overall Wheelbase (engine & tender) (ft / m)39.67 / 12.09
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 / ML/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)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x406
Tractive Effort (lbs / kg)9248 / 4194.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.33
Heating Ability
Firebox Area (sq ft / m2)56 / 5.20
Grate Area (sq ft / m2)14 / 1.30
Evaporative Heating Surface (sq ft / m2)436 / 40.51
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)436 / 40.51
Evaporative Heating Surface/Cylinder Volume208.17
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2380
Same as above plus superheater percentage2380
Same as above but substitute firebox area for grate area9520
Power L13487
Power MT576.56

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