Penoles-Avalos Articulated Locomotives in Mexico

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 16496)

Data from "Compania de Minerales & Metales SA No. 1 Cripple Creek, CO, United States" on the [] website at [], last accessed 8 August 2020. See also Sampug394's 22 April 2020 post and diagram on the "Little Known Narrow Gauge Steamers" thread on the Trainz Railroad Simulator 2019 forum, page 1 et. seq. at [], last accessed 8 August 2020. Works numbers were 2897 in 1908 and 6024 in 1912.

Locobase could find very little information for one of the few 0-4-4-0 Mallets delivered with a tender in North America. They originally served the Penoles mines in Coahuila State.

The front set of drivers, powered by the low pressure cylinders were mounted outside the frame. A wider section of frame placed the rear set's drivers inside to be turned through a crank by the HP cylinders mounted outside.

No 1 later came to Colorado to operate on the Cripple Creek & Victor tourist railroad. The No 2 remained in Mexico to be put on display on a plinth at the NdeM Depot in Saltillo.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID16496
Number in Class2
Road Numbers1-2
Number Built2
BuilderOrenstein & Koppel
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)37,400 / 16,964
Engine Weight (lbs / kg)37,400 / 16,964
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)16 / 8
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)24 / 610
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)8.5" x 10" / 216x254
Low Pressure Cylinders (dia x stroke) (in / mm)10" x 10" / 254x254
Tractive Effort (lbs / kg)4457 / 2021.66
Factor of Adhesion (Weight on Drivers/Tractive Effort) 8.39
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area
Power L1
Power MT

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Wes Barris