Caminhos de Ferro do Norte de Portugal 2-6-0 Locomotives in Portugal


Class Details by Steve Llanso of Sweat House Media

Class 51 (Locobase 9705)

Data from [], last accessed 30 November 2008.

Kessler delivered this narrow-gauge trio to the CFNP, from which they transferred to the CF de Guimarpes as the latter's 6-8. There they were considered the line's premium power. Ultimately, they served the national railway in the Oporto area as well as on small lines in the Vale do Vouga.

The engines were all retired in 1977 and at least two have been preserved for museum display.


Class 81 (Locobase 9708)

Data from [], last accessed 30 November 2008.

Kessler delivered this narrow-gauge trio to the CFNP, from which they transferred to the CF de Guimarpes as the latter's 6-8. There they were considered the line's premium power. Ultimately, they served the national railway in the Oporto area as well as on small lines in the Vale do Vouga.

The engines were all retired in 1977 and at least two have been preserved for museum display.

Principal Dimensions by Steve Llanso of Sweat House Media

Class5181
Locobase ID9705 9708
RailroadCaminhos de Ferro do Norte de PortugalCaminhos de Ferro do Norte de Portugal
CountryPortugalPortugal
Whyte2-6-0T2-6-0T
Number in Class36
Road Numbers51-53 / 101-10381-86
GaugeMetreMetre
Number Built36
BuilderKesslerKessler
Year19071887
Valve GearStephensonStephenson
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)
Engine Weight (lbs / kg)70,548 / 32,00054,895 / 24,900
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)70,548 / 32,00054,895 / 24,900
Tender Water Capacity (gals / ML)924 / 3.50924 / 3.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1 / 11 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40.60 / 103039.40 / 1000
Boiler Pressure (psi / kPa)213.20 / 14.70140.70 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)13.78" x 19.69" / 350x50013.78" x 19.69" / 350x500
Tractive Effort (lbs / kg)16,689 / 7570.0111,349 / 5147.83
Factor of Adhesion (Weight on Drivers/Tractive Effort)
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)11.73 / 1.09 9.47 / 0.88
Evaporative Heating Surface (sq ft / m2)594 / 55.22694 / 64.50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)594 / 55.22694 / 64.50
Evaporative Heating Surface/Cylinder Volume174.77204.19
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25011332
Same as above plus superheater percentage25011332
Same as above but substitute firebox area for grate area
Power L1
Power MT

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