San Joaquin & Eastern 2-6-2 "Prairie" Locomotives in 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 Volume 71, pp. 165+.Works number was 57613 in January 1924.

Locobase 14335 discusses the history of the Slow, Jerky & Expensive. This oil-burning 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. Its taller drivers under the boiler lent to it an air of "express engine in miniature".

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 Lavacot bought the engine in 1983 and stored it on the Willamina & Grande Ronde Railroad. Many years of restoration work led to its steaming in 2015. Described as "in like-new condition", the 205, lettered "Santa Maria Valley" on her tender, operated on the Albany & Eastern Railroad

Principal Dimensions 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 Wheelbase (ft / m)10.25 / 3.12
Engine Wheelbase (ft / m)26.92 / 8.21
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)50.92 / 15.52
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)98,000 / 44,452
Engine Weight (lbs / kg)128,000 / 58,060
Tender Loaded Weight (lbs / kg)96,000 / 43,545
Total Engine and Tender Weight (lbs / kg)224,000 / 101,605
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1800 / 6813
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 1245
Boiler Pressure (psi / kPa)195 / 13.40
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)23,462 / 10642.20
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.18
Heating Ability
Tubes (number - dia) (in / mm)113 - 2" / 51
Flues (number - dia) (in / mm)18 - 5.375" / 137
Flue/Tube length (ft / m)13.75 / 4.19
Firebox Area (sq ft / m2)102 / 9.48
Grate Area (sq ft / m2)18.70 / 1.74
Evaporative Heating Surface (sq ft / m2)1257 / 116.82
Superheating Surface (sq ft / m2)274 / 25.46
Combined Heating Surface (sq ft / m2)1531 / 142.28
Evaporative Heating Surface/Cylinder Volume199.21
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 area23,470
Power L110,683
Power MT720.98

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