Astillero a Ontaneda 2-6-2 Locomotives in Spain

Class Details by Steve Llanso of Sweat House Media

Class Saron (Locobase 12435)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 23, p. 75. Works numbers were 17994-17996 in August 1900.

Construction of this line between Santander Province towns El Astillero and Ontaneda was to provide an alternative to the Santander-Alar del Rey. It linked to the Santander, Burgos y Madrid. Its initial distance was 35 km (21.7 miles).

The three "Yanqui" side tanks shown here had names: Saron, Puente Viesgo, and Ontaneda. The specifications included a top speed of 55 km/h (34 mph) on the level, 30 km/h (18.6 mph) up a 2% grade. The engines had to negotiate curves of 120-metre radius (9/1/2 deg curvature).

Alas, Wikipedia's entry on the railway says that they served on the line only briefly because they were too heavy. The A a O procured 3 replacements from the Belgian firm Saint Leonard and gave those the same names and numbers.

The Baldwins were far from done, however, as they were sold to the Cia de los Ferrocarriles Economicos. This was a system of light railways similar to those laid down in France as CF d'Interet Local.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID12435
RailroadAstillero a Ontaneda
Number in Class3
Road Numbers1-3
Number Built3
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.92 / 3.02
Engine Wheelbase (ft / m)22.25 / 6.78
Ratio of driving wheelbase to overall engine wheelbase 0.45
Overall Wheelbase (engine & tender) (ft / m)22.25 / 6.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)60,000 / 27,216
Engine Weight (lbs / kg)80,000 / 36,287
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)80,000 / 36,287
Tender Water Capacity (gals / ML)850 / 3.22
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)9996 / 4534.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.00
Heating Ability
Tubes (number - dia) (in / mm)171 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.96 / 2.73
Firebox Area (sq ft / m2)76.30 / 7.09
Grate Area (sq ft / m2)13.50 / 1.25
Evaporative Heating Surface (sq ft / m2)770 / 71.56
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)770 / 71.56
Evaporative Heating Surface/Cylinder Volume216.09
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2025
Same as above plus superheater percentage2025
Same as above but substitute firebox area for grate area11,445
Power L14039
Power MT445.22

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