Deep River Logging Company / Deep River Lumber Corporation 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 14700)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 62, p. 329. Works number was 51822 in May 1919.

Very small wood-burning logging Prairie suitable for the light (30 lb/yard, 15 kg/metre) rail of a South Carolina lumber company's tram line. The small scale is indicated by its total length of 15 miles (24.1 km).

The 4 would later work for the Beaufort County Lumber Company in North Carolina.


Class 7 (Locobase 14303)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 52, pp. 338. Works number was 42199 in July 1915.

This Washington State logging company had its headquarters in Wahkiakum County. Its profile included maximum grades of 4% (partially compensated for curves) and average grades of 1 1/2-2%. Curves measured as tight as 25 degrees (207 foot/63 metre radii), and rails weighed 56 lb/yard.

Other than the use of oil fuel, this engine was typical of a medium-sized logging Prairie.

Principal Dimensions by Steve Llanso of Sweat House Media
Class47
Locobase ID14,700 14,303
RailroadDeep River Lumber CorporationDeep River Logging Company
CountryUSAUSA
Whyte2-6-22-6-2
Number in Class11
Road Numbers47
GaugeStdStd
Number Built11
BuilderBaldwinBaldwin
Year19191915
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.83 / 2.39 9.17 / 2.80
Engine Wheelbase (ft / m)20.58 / 6.2724.67 / 7.52
Ratio of driving wheelbase to overall engine wheebase 0.38 0.37
Overall Wheelbase (engine & tender) (ft / m)39.77 / 12.1246.75 / 14.25
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)40,000 / 18,14486,000 / 39,009
Engine Weight (lbs / kg)55,000 / 24,948111,000 / 50,349
Tender Loaded Weight (lbs / kg)45,000 / 20,41250,500 / 22,906
Total Engine and Tender Weight (lbs / kg)100,000 / 45,360161,500 / 73,255
Tender Water Capacity (gals / ML)2000 / 7.582500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1200 / 4.50
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 1148 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 91444 / 1118
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x40616" x 24" / 406x610
Tractive Effort (lbs / kg)9792 / 4441.5821,364 / 9690.56
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08 4.03
Heating Ability
Firebox Area (sq ft / m2)53 / 4.92118 / 10.96
Grate Area (sq ft / m2)14 / 1.3016 / 1.49
Evaporative Heating Surface (sq ft / m2)430 / 39.951600 / 148.64
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)430 / 39.951600 / 148.64
Evaporative Heating Surface/Cylinder Volume205.31286.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25202880
Same as above plus superheater percentage25202880
Same as above but substitute firebox area for grate area954021,240
Power L135845176
Power MT592.60398.06

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