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


Class Details by Steve Llanso of Sweat House Media

Class 16 (Locobase 1012)

Data from [link] (reviewed 13 February 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 two-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 23 (Locobase 1013)

Data from [link] (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 24 (Locobase 1014)

Data from [link] (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, Volume 62, pp. 92+. See also Brian Hollingsworth, "No 24 2-6-2", North American Locomotives (England: Salamander Books, 1984), pp. 84-85.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).

Brian Hollingworth described an error in reading the tender's specification in a classic case of measured confusion. Sandy River submitted a design that included an 84" width, itself a substantial beam for so small a gauge, he noted."but the boss's sloppy handwriting led to Baldwin building a one 8ft 4 in tender." At 100" wide instead, "this overgenerous water cart overbalanced (unfortunately on a trestle) and had to have a slice taken out of its middle."

Otherwise, the "tiny hunk of locomotive engineering was very soundly built." The constant-lead valve gear, saturated boiler, and slide valves made "an excellent combination for ease of maintenance." Hollingworth quoted the saying "piston valves wear out, slide valves wear in" and added that the amount of extra coal and water consumption "would hardly be noticed on such a small machine."

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.


Class 8/19 (Locobase 1010)

Data from [link] (reviewed 13 February 2004) and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 26, p. 274. See also Chuck Collins, "SR&RL #19" in the "Prototype Information: the SR&RL locomotives' entry on The Maine On2 FAQ: An online resource for modeling the two-foot gauge railroads of Maine in 1:48 scale at [link] , last accessed 5 July 2024. Works number was 23874 in March 1904.

This narrow-gauge Prairie operated on the largest 2-foot gauge railroad in US, the Sandy River & Rangely Lakes in Maine. To allow the most room between the rails on such a narrow gauge, Baldwin placed the frames outside of the running gear. The tender had to be "as short as possible." The desire to reach speeds of 40 mph (64 kph) meant the cranks had to be fitted with additional counterbalances. Drivers at that speed would spin at 407 revolutions per minute.

The 8's whistle was of the "bell type" with a "sharp tone" and rung with a lever rather than a rope.

According to Chuck Collins, the 8 first handled lumber traffic from the new sawmills at Madrid and Bigelow and ran as the "preferred freight engine" on the SR&RL's Phillips & Farmington main line. On 22 March 1907, the 8 "wrecked north of Strong", but returned in 1908 bearing #19.

Bumped from its prior duties by #23 (Locobase 1011) in 1913, the 8 served "system wide" unitl caught up in the Phillips engine house fire n 12 February 1923. Once again repairs restored it to duty until 1932. It followed other SR&RL locomotives to the scrapper in 1935.


Class unknown (Locobase 1011)

Data from [link] (reviewed 13 February 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.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1623248/19unknown
Locobase ID1012 1013 1014 1010 1011
RailroadSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangely LakesSandy River & Rangeley Lakes
CountryUSAUSAUSAUSAUSA
Whyte2-6-22-6-22-6-22-6-22-6-2
Number in Class21111
Road Numbers16, 1823241915
Gauge2'2'2'2'2'
Number Built2111
BuilderMaine CentralBaldwinBaldwinBurnham, Williams & CoMaine Central
Year19121913191919041912
Valve GearWalschaertWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13 8.50 / 2.597 / 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 wheelbase 0.38 0.35 0.35
Overall Wheelbase (engine & tender) (ft / m)40.59 / 12.3747.17 / 14.3840 / 12.19
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)50,000 / 22,68042,000 / 19,05137,500 / 17,01037,000 / 16,783
Engine Weight (lbs / kg)54,000 / 24,49463,000 / 28,57654,000 / 24,49450,000 / 22,68049,500 / 22,453
Tender Loaded Weight (lbs / kg)43,000 / 19,50444,000 / 19,95837,000 / 16,78337,000 / 16,783
Total Engine and Tender Weight (lbs / kg)106,000 / 48,08098,000 / 44,45287,000 / 39,46386,500 / 39,236
Tender Water Capacity (gals / ML)2000 / 7.582000 / 7.581500 / 5.681400 / 5.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)3 / 33 / 32 / 1.802 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)28 / 1423 / 11.5021 / 10.5021 / 10.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 83833 / 83833 / 83833 / 83835 / 889
Boiler Pressure (psi / kPa)160 / 1100180 / 1240170 / 1170180 / 1240180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x40613" x 16" / 330x40612" x 16" / 305x40612" x 16" / 305x40612.5" x 16" / 318x406
Tractive Effort (lbs / kg)9495 / 4306.8612,537 / 5686.6910,089 / 4576.3010,682 / 4845.2810,929 / 4957.32
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99 4.16 3.51 3.39
Heating Ability
Tubes (number - dia) (in / mm)114 - 2" / 51100 - 2" / 51100 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.83 / 3.9110.76 / 3.2810.77 / 3.28
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 / 56.48608 / 56.48
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)821 / 76.30608 / 56.48608 / 56.48
Evaporative Heating Surface/Cylinder Volume333.74290.91290.91
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation192615811674
Same as above plus superheater percentage192615811674
Same as above but substitute firebox area for grate area10,80085009000
Power L1451138384064
Power MT596.70604.38716.77

All material Copyright © SteamLocomotive.com
Wes Barris