Rumford Falls & Rangeley Lakes 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 12169)

Data from Baldwin Locomotive Works Specification for Engines, 1890, as digitized by the DeGolyer Library of Southern Methodist University Vol 20, p. 38. Works numbers were 14494 in October 1895 and 14955 in July 1896.

These locomotives were identical except that the 4 had bigger side tanks that held 1,600 gallons of water.

The RF & RL covered 38.7 miles of standard gauge from Rumford, where it met with its parent Portland & Rumford Falls, to Kennebago farm on the shore of Lake Mooselucmaguntic.

In 1903, the Portland & Rumford Falls renumbered these tanks 51-52. Four years later, the Maine Central leased the P & RF and RF & RL for 999 years, which resulted in another renumbering.

The MEC didn't hang on to 112, selling it to International as their #6 in September 1907. 113 remained with the railroad until it was scrapped in May 1919.


Class 2 (Locobase 12170)

Data from Baldwin Locomotive Works Specification for Engines, 1890, as digitized by the DeGolyer Library of Southern Methodist University Vol 20, p. 39. Works number was 14494 in October 1895.

In 1903, Portland & Rumford Falls renumbered this tank 53. In 1907, Four years later, the Maine Central leased the P & RF and RF & RL for 999 years, which resulted in another renumbering. Unlike the 2-6-2T shown in Locobase 12169, however, the MEC held onto the 162, converting it to a 2-6-2T and placing in its own class F.

After another 9 years of service, the 162 was scrapped in September 1916.

Principal Dimensions by Steve Llanso of Sweat House Media
Class12
Locobase ID12,169 12,170
RailroadRumford Falls & Rangeley LakesRumford Falls & Rangeley Lakes
CountryUSAUSA
Whyte2-6-2T2-6-2
Number in Class21
Road Numbers1, 4 / 51-52 / 112-1132 / 53 / 162
GaugeStdStd
Number Built21
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year18951895
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.0512.50 / 3.81
Engine Wheelbase (ft / m)25.75 / 7.8519.75 / 6.02
Ratio of driving wheelbase to overall engine wheebase 0.39 0.63
Overall Wheelbase (engine & tender) (ft / m)25.75 / 7.8546.08 / 14.05
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)80,000 / 36,28786,000 / 39,009
Engine Weight (lbs / kg)100,000 / 45,359100,000 / 45,359
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)100,000
Tender Water Capacity (gals / ML)1400 / 5.303200 / 12.12
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 2248 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 111856 / 1422
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x61018" x 24" / 457x610
Tractive Effort (lbs / kg)18,991 / 8614.1818,885 / 8566.10
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.21 4.55
Heating Ability
Firebox Area (sq ft / m2)75.20 / 6.99115 / 10.69
Grate Area (sq ft / m2)14.40 / 1.3421 / 1.95
Evaporative Heating Surface (sq ft / m2)1034 / 96.101338 / 124.35
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1034 / 96.101338 / 124.35
Evaporative Heating Surface/Cylinder Volume185.14189.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation23043360
Same as above plus superheater percentage23043360
Same as above but substitute firebox area for grate area12,03218,400
Power L129624041
Power MT244.88310.77