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 Middle Run Media | |
|---|---|
| Class | D Luiz |
| Locobase ID | 8440 |
| Railroad | Suleste |
| Country | Portugal |
| Whyte | 2-2-2 |
| Number in Class | |
| Road Numbers | 629 |
| Gauge | 5'6" |
| Number Built | |
| Builder | Beyer, Peacock |
| Year | 1862 |
| Valve Gear | Stephenson |
| 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 / 830 |
| 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 Volume | 261.54 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2160 |
| Same as above plus superheater percentage | 2160 |
| Same as above but substitute firebox area for grate area | 12,084 |
| Power L1 | 6046 |
| Power MT | 512.97 |