Suleste 2-2-2 Locomotives in Portugal

Class Details by Steve Llanso of Sweat House Media

Class D Luiz (Locobase 8440)

Data from G D Dempsey, CE & D Kinnear Clark, CE, A Rudimentary Treatise on the Locomotive Engine (London: Crosby, Lockwood & Co, 1879), passim. Works numbers were 328 in 1862.

Although the D. Luiz was shipped to the South Eastern almost two decades before, Clark used the Beyer, Peacock design as his stalking iron horse to illustrate "modern" engine-construction techniques. It was displayed at the 1862 London Exhibition, which accounts at least in part for the extensive documentation available in Clark's analysis.

According to O S Nock, writing in his Railways in the Formative Years 1851-1895 (London: Blandsford Press, 1973), pl 3, "One could not find a more characteristic British express passenger locomotive." He noted that the engine remained in service for over 70 years and was later restored to its original condition. As of 2007, it was on display at the Sectpo Museologica de Santarem.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassD Luiz
Locobase ID8440
Number in Class
Road Numbers629
Number Built
BuilderBeyer, Peacock
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)15.33 / 4.67
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,984 / 11,786
Weight on Drivers (lbs / kg)25,984 / 11,786
Engine Weight (lbs / kg)63,392 / 28,754
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2136 / 8.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)84 / 2134
Boiler Pressure (psi / kPa)120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x559
Tractive Effort (lbs / kg)6839 / 3102.12
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.80
Heating Ability
Tubes (number - dia) (in / mm)215 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.92 / 3.33
Firebox Area (sq ft / m2)100.70 / 9.36
Grate Area (sq ft / m2)18 / 1.67
Evaporative Heating Surface (sq ft / m2)1339 / 124.44
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1339 / 124.44
Evaporative Heating Surface/Cylinder Volume261.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2160
Same as above plus superheater percentage2160
Same as above but substitute firebox area for grate area12,084
Power L16046
Power MT512.97

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