Mexico, Cuernavaca & Pacific 4-6-0 Locomotives in Mexico


Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 9632)

Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). Works number was 2783.

Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.

A Belpaire-boilered Ten-wheeler with cabbage stack. It was a duplicate of the Central Mexicano 4-6-0s shown in Locobase 2890.

Principal Dimensions by Steve Llanso of Middle Run Media

Class7
Locobase ID9632
RailroadMexico, Cuernavaca & Pacific
CountryMexico
Whyte4-6-0
Number in Class1
Road Numbers7
GaugeStd
Number Built1
BuilderBrooks
Year1898
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)23.33 / 7.11
Ratio of driving wheelbase to overall engine wheelbase 0.47
Overall Wheelbase (engine & tender) (ft / m)51.33 / 15.65
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)108,850 / 49,374
Engine Weight (lbs / kg)143,700 / 65,181
Tender Loaded Weight (lbs / kg)85,000 / 38,555
Total Engine and Tender Weight (lbs / kg)228,700 / 103,736
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 8.50 / 8
Minimum weight of rail (calculated) (lb/yd / kg/m)60 / 30
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)26,229 / 11897.29
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.15
Heating Ability
Tubes (number - dia) (in / mm)268 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11 / 3.35
Firebox Area (sq ft / m2)187.70 / 17.44
Grate Area (sq ft / m2)26.10 / 2.43
Evaporative Heating Surface (sq ft / m2)2032 / 188.85
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2032 / 188.85
Evaporative Heating Surface/Cylinder Volume232.76
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4698
Same as above plus superheater percentage4698
Same as above but substitute firebox area for grate area33,786
Power L15716
Power MT347.31

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