Societe Miniere et Metallurgique de Penarroya 0-6-0 Locomotives in Spain

Class Details by Steve Llanso of Sweat House Media

Class Terrible (Locobase 10774)

Data from Baldwin Locomotive Works, Record of Recent Construction ((1903), No. 31, p. 20-21; and DeGolyer, Volume 24, p. 4. Works numbers were 19356-19359 in August 1901. See Ferropedia's [] Minera y Metal+rgica de Peñarroya. for more expansive description of this railway.

The SMMP was chartered in 1881 to serve the lead deposits in Estremadura. In 1893, it took over the Societe Houilliere et Metallurgique de Belmez and in the process greatly added to its resources. It would eventually maintain a monopoly over lead resources.

The line was located north of Cordoma and eventually ran 148 km (92 miles) northeast between Peñarroya and Puertollano and 68 km (42.2 miles) west to Fuente de Arco. The western section opened first on 26 June 1895.

Teetering on the short wheelbase, this quartet of switchers served the yards of the SMP. Their names derived from a variety of sources, it would seem: Terrible, Santa Elisa, BTlmez, La Vega.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10774
RailroadSociete Miniere et Metallurgique de Penarroya
Number in Class4
Road Numbers3-6
Number Built4
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74
Engine Wheelbase (ft / m)9 / 2.74
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)9 / 2.74
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)88,800 / 40,279
Engine Weight (lbs / kg)88,800 / 40,279
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)88,800 / 40,279
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 1092
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x559
Tractive Effort (lbs / kg)17,813 / 8079.85
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.99
Heating Ability
Tubes (number - dia) (in / mm)139 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.67 / 3.86
Firebox Area (sq ft / m2)83 / 7.71
Grate Area (sq ft / m2)14.90 / 1.38
Evaporative Heating Surface (sq ft / m2)996 / 92.53
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)996 / 92.53
Evaporative Heating Surface/Cylinder Volume194.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2384
Same as above plus superheater percentage2384
Same as above but substitute firebox area for grate area13,280
Power L13160
Power MT235.36

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