San Joaquin & Eastern 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 205 (Locobase 14336)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 71, pp. 165+.Works number was 57613 in January 1924.

Locobase 14335 discusses the history of the Slow, Jerky & Expensive. This Prairie came ten years after the earlier Baldwin and featured some superheating and shorter drivers. Piston valves measured 9 1/2" (241 mm) in diameter.

When the SJ&E closed in 1933, the 205 was sold in November to the Santa Maria Valley to haul oil and asphalt between Roadamite to Guadalupe, Calif. When the 205 was retired in 1950, it was donated in May to the city of Santa Maria, where it stood on display for over 30 years. George Lavacat bought the engine in 1983 and stored it on the Willamina & Grande Ronde Railroad.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14336
RailroadSan Joaquin & Eastern
Number in Class1
Road Numbers205
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.25'
Engine Wheelbase26.92'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)50.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers98000 lbs
Engine Weight128000 lbs
Tender Light Weight96000 lbs
Total Engine and Tender Weight224000 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)1800 gals
Minimum weight of rail (calculated)54 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter49"
Boiler Pressure195 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort23462 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.18
Heating Ability
Firebox Area102 sq. ft
Grate Area18.70 sq. ft
Evaporative Heating Surface1257 sq. ft
Superheating Surface274 sq. ft
Combined Heating Surface1531 sq. ft
Evaporative Heating Surface/Cylinder Volume199.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3647
Same as above plus superheater percentage4303
Same as above but substitute firebox area for grate area23470
Power L110692
Power MT721.59

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