Sandy River & Rangely Lakes 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 23 (Locobase 1013)

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 Rail Data Exchange and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 45, p. 162. Works number was 40733 in October 1913.

Largest 2-ft gauge engine in the US, but not the heaviest. The rear supporting truck was equalized with the drivers. The specs stated that "as many parts as possible [were] to be interchangeable with engines previously built for this road also for the Bridgeton [sic] and Saco River."

Operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine. It was scrapped in August 1936, a little more than a year after the line closed.

The Brecon Mountain Railway in the UK began building a new locomotive from the original Baldwin drawings. As of 2013, construction of the "Sandy River" was described as "well advanced", but still requiring "some years" before it would be completed.


Class unknown (Locobase 1010)

Data from http://membrane.com/~elmer/rail/units/srrl.html (reviewed 13 Feb 2004) and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 26, p. 274. Works numbers were 23182-23183 in November 1903. Works number was 23874 in March 1904.

Operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine. Retired in February 1923 and scrapped in September 1935.


Class unknown (Locobase 1011)

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 Rail Data Exchange collective.

Rebuilt by MEC from 1891 Baldwin 2-6-0.

Operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine. Retired 1923.


Class unknown (Locobase 1012)

Data from http://membrane.com/~elmer/rail/units/srrl.html (reviewed 13 Feb 2004).

Rebuilt by MEC from 1893 Baldwin 2-6-0s (See Locobase 12047 for the Laurel Springs & Hot Springs engine that would become the SR & RL's 16.)

Operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine. 16 out of service by early 30s, 18 last operating SR&RL locomotive.


Class unknown (Locobase 1014)

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 Rail Data Exchange, supplemented by DeGolyer, Vol 62, pp. 92+. Works number was 51803 in July 1919.

Operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine, which offered 4% grades and 20 degree (288 foot/87.8 metre radii) according to the Baldwin specifications. The 24 reverted to the 19's dimensions of 1904 (Locobase 1010). Sold to Robert Sawyer after the SR&RL closed in 1932. Sawyer, although planning to restore the locomotive, suffered either a change of heart or of fortunes, which led to the 24 being scrapped in October 1937.

Principal Dimensions by Steve Llanso of Sweat House Media
Class23unknownunknownunknownunknown
Locobase ID1013 1010 1011 1012 1014
RailroadSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangely Lakes
CountryUSAUSAUSAUSAUSA
Whyte2-6-22-6-22-6-22-6-22-6-2
Number in Class11121
Road Numbers23191516, 1824
Gauge2'2'2'2'2'
Number Built11121
BuilderBaldwinBurnham, Williams & CoMaine CentralMaine CentralBaldwin
Year19131904191219121919
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.50 / 2.597 / 2.137 / 2.137 / 2.137 / 2.13
Engine Wheelbase (ft / m)22.50 / 6.8620 / 6.1020 / 6.10
Ratio of driving wheelbase to overall engine wheebase 0.38 0.35 0.35
Overall Wheelbase (engine & tender) (ft / m)40.59 / 12.3740 / 12.1947.17 / 14.38
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)50,000 / 22,68037,000 / 16,78337,000 / 16,78342,000 / 19,051
Engine Weight (lbs / kg)63,000 / 28,57649,500 / 22,45349,500 / 22,45354,000 / 24,49454,000 / 24,494
Tender Loaded Weight (lbs / kg)43,000 / 19,50437,000 / 16,78337,000 / 16,78344,000 / 19,958
Total Engine and Tender Weight (lbs / kg)106,000 / 48,08086,500 / 39,23686,500 / 39,23698,000 / 44,452
Tender Water Capacity (gals / ML)2000 / 7.581500 / 5.681400 / 5.302000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3 / 2.702 / 1.802 / 1.803 / 2.70
Minimum weight of rail (calculated) (lb/yd / kg/m)28 / 1421 / 10.5021 / 10.5023 / 11.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 83833 / 83835 / 88933 / 83833 / 838
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40180 / 12.40160 / 11170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)13" x 16" / 330x40612" x 16" / 305x40612.5" x 16" / 318x40612" x 16" / 305x40612" x 16" / 305x406
Tractive Effort (lbs / kg)12,537 / 5686.6910,682 / 4845.2810,929 / 4957.329495 / 4306.8610,089 / 4576.30
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99 3.46 3.39 4.16
Heating Ability
Firebox Area (sq ft / m2)60 / 5.5850 / 4.6550 / 4.65
Grate Area (sq ft / m2)10.70 / 0.99 9.30 / 0.86 9.30 / 0.86
Evaporative Heating Surface (sq ft / m2)821 / 76.30608 / 56.51608 / 56.48
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)821 / 76.30608 / 56.51608 / 56.48
Evaporative Heating Surface/Cylinder Volume334.01290.30290.30
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation192616741581
Same as above plus superheater percentage192616741581
Same as above but substitute firebox area for grate area10,80090008500
Power L1451540563830
Power MT597.23725.02603.12