Sierra Railway 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 18 (Locobase 13080)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 30, p. 177. Works number was 29790 in December 1906.

An earlier Escanaba & Lake Superior Consolidation order (Locobase 12722) was the obvious inspiration for this logging 2-8-0. The only big differences were the boiler pressure (this engine was set 35 psi higher) and the driver diameter, which was smaller. So the starting tractive effort was considerably greater.

The Sierra used the engine until 1953 with some runs during that time paid for by movie companies. In August 1966, the 18 was sold to Edward Cadiew for display at West Coast Mobile Homes (don't quite see the tie-in myself).


Class 20 (Locobase 14330)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 53, p. 294. Works number was 43344 in May 1916.

Small though it was, this little Consolidation was superheated, oil-fired, and used 9 1/2" piston valves to distribute the steam. Trundling along on 50 lb/yard (25 kg/metre) rail and around the 27 degree curves, the 20 worked for the SRwy (in 1935, renamed the SRR) until it was drafted by the US Army in 1942.

According to a May 2013 email from Kyle Wyatt, the locomotive was sold by the Army in 1948 to Kurth Brothers Lumber of Jaspar, Tex, who restored the number 20 and operated the engine until it was scrapped in 1955.


Class 22 (Locobase 14332)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 65, p. 258+. Works number was 53205 in April 1920.

This little Consolidation was essentially identical to the 20, which had arrived four years earlier (Locobase 14330). The only noticeable difference, other than a two-ton weight gain,

The Sierra Railroad sold the 22 in 1940 to the California Railway & Navigation Company as their second 41. It was scrapped in 1950.


Class 28 (Locobase 14333)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 65, p. 262+. Works number was 55246 in January 1922.

Unlike many of the other SRwy engines, the 28 has remained with the Sierra from its first day in service. It was put in storage in 1955 when the SRR converted to diesel power and moved its operation, but brought back into service in 1958 as a movie and TV locomotive. Operating on the original Jamestown, Calif, track, the 28 served the film industry well as well as passenger excursions to the end of the 1970s.

Railtown, as it had come to be named during the excursion years, gained an additional life when the State of California bought the assets and turned them into a state museum in 1983. 28 operated as a museum engine well into the 21st Century.

Specifications by Steve Llanso of Sweat House Media
Class18202228
Locobase ID13080 14330 14332 14333
RailroadSierra RailwaySierra RailwaySierra RailwaySierra Railway
CountryUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-0
Number in Class1111
Road Numbers18202228
GaugeStdStdStdStd
Number Built1111
BuilderBurnham, Williams & CoBaldwinBaldwinBaldwin
Year1906191619201922
Valve GearStephensonWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase12.17'12.17'12.17'14.50'
Engine Wheelbase19.67'19.67'19.67'22.17'
Ratio of driving wheelbase to overall engine wheebase 0.62 0.62 0.62 0.65
Overall Wheelbase (engine & tender)45.12'45.83'46.25'50.17'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers104000 lbs103000 lbs107000 lbs127600 lbs
Engine Weight115000 lbs116000 lbs121000 lbs142000 lbs
Tender Light Weight60000 lbs80000 lbs84500 lbs90500 lbs
Total Engine and Tender Weight175000 lbs196000 lbs205500 lbs232500 lbs
Tender Water Capacity3000 gals4000 gals4000 gals4000 gals
Tender Fuel Capacity (oil/coal)800 gals1000 gals1000 gals2000 gals
Minimum weight of rail (calculated)43 lb/yard43 lb/yard45 lb/yard53 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter42"42"42"48"
Boiler Pressure180 psi180 psi180 psi180 psi
Cylinders (dia x stroke)18" x 22"18" x 22"18" x 22"19" x 26"
Tractive Effort25966 lbs25966 lbs25966 lbs29918 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01 3.97 4.12 4.26
Heating Ability
Firebox Area126 sq. ft135 sq. ft135 sq. ft133 sq. ft
Grate Area22.20 sq. ft22.20 sq. ft22.20 sq. ft28.20 sq. ft
Evaporative Heating Surface1374 sq. ft1117 sq. ft1075 sq. ft1569 sq. ft
Superheating Surface250 sq. ft231 sq. ft332 sq. ft
Combined Heating Surface1374 sq. ft1367 sq. ft1306 sq. ft1901 sq. ft
Evaporative Heating Surface/Cylinder Volume212.05172.39165.91183.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3996399639965076
Same as above plus superheater percentage3996471547155939
Same as above but substitute firebox area for grate area22680286742867428010
Power L13897786074468813
Power MT330.44672.94613.67609.07

Photos


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