Hemenway & Browne 2-4-2 Locomotives in Chile


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 11721)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 16, p. 205. Works number was 11625-11626 in February 1891.

This pair of tanks was almost certainly exported to the Agua Santa Nitrate & Railway.

Principal Dimensions by Steve Llanso of Sweat House Media

Classunknown
Locobase ID11721
RailroadHemenway & Browne
CountryChile
Whyte2-4-2ST
Number in Class2
Road Numbers
GaugeMetre
Number Built2
BuilderBurnham, Williams & Co
Year1891
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)18.17 / 5.54
Ratio of driving wheelbase to overall engine wheelbase 0.28
Overall Wheelbase (engine & tender) (ft / m)18.17 / 5.54
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)30,000 / 13,608
Engine Weight (lbs / kg)44,800 / 20,321
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)44,800 / 20,321
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)25 / 12.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 940
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)5782 / 2622.67
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.19
Heating Ability
Tubes (number - dia) (in / mm)96 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)38 / 3.53
Grate Area (sq ft / m2) 8.70 / 0.81
Evaporative Heating Surface (sq ft / m2)377 / 35.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)377 / 35.04
Evaporative Heating Surface/Cylinder Volume214.22
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1131
Same as above plus superheater percentage1131
Same as above but substitute firebox area for grate area4940
Power L12583
Power MT379.64

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