Sandy River & Rangely Lakes 2-4-4 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 1007)

Data from http://membrane.com/~elmer/rail/units/srrl.html (reviewed 13 Feb 2004). See also Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 53, p. 256.Works number was 44231 in October 1916.

Operated on the largest 2-foot gauge railroad in US, the SR&RL in Maine.

Heaviest locomotive ever operated on the SR&RL and fitted with outside Walschaert valve gear squeezed under the running board.

After the SR & RL ceased operations in 1932, the 10 lingered in storage until it was scrapped in June 1935.

The Brecon Mountain Railway in the UK began building a duplicate based on Baldwin's original drawings. By 2013, they described the effort as "well advanced" to the point that construction of the boiler would begin in 2014.


Class 16 / 8 (Locobase 1006)

Data from http://membrane.com/~elmer/rail/units/srrl.html (reviewed 13 Feb 2004) and 1934 Maine Central locomotive tables supplied by Allen Stanley in May 2005 from his extensive Raildata collection and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 30, p. 277. Works numbers were 31826 in September 1907 and 33550 in July 1909.

Operated on the largest 2-foot gauge railroad in US, the SR&RL in Maine.

#9 slightly heavier at 56,750 lb and fitted with a boiler having 55 sq ft of direct heating surface and a total of 567 sq ft.

Specifications by Steve Llanso of Sweat House Media
Class1016 / 8
Locobase ID1007 1006
RailroadSandy River & Rangely LakesSandy River & Rangely Lakes
CountryUSAUSA
Whyte2-4-4T2-4-4T
Number in Class12
Road Numbers1016 / 8-9
Gauge2'2'
Number Built12
BuilderBaldwinBurnham, Williams & Co
Year19161907
Valve GearWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase5' 4.50'
Engine Wheelbase26'23.67'
Ratio of driving wheelbase to overall engine wheebase 0.19 0.19
Overall Wheelbase (engine & tender)26'23.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers38000 lbs37500 lbs
Engine Weight75750 lbs55650 lbs
Tender Light Weight
Total Engine and Tender Weight75750 lbs55650 lbs
Tender Water Capacity1000 gals800 gals
Tender Fuel Capacity (oil/coal)1.5 tons
Minimum weight of rail (calculated)32 lb/yard31 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter36"35"
Boiler Pressure180 psi180 psi
Cylinders (dia x stroke)12" x 16"11.5" x 14"
Tractive Effort9792 lbs8094 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.88 4.63
Heating Ability
Firebox Area62 sq. ft56 sq. ft
Grate Area12.70 sq. ft11 sq. ft
Evaporative Heating Surface659 sq. ft571 sq. ft
Superheating Surface
Combined Heating Surface659 sq. ft571 sq. ft
Evaporative Heating Surface/Cylinder Volume314.65339.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation22861980
Same as above plus superheater percentage22861980
Same as above but substitute firebox area for grate area1116010080
Power L149975309
Power MT579.82624.23


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