Minho e Douro 0-6-0 Locomotives in Portugal
Class Details by Steve Llanso of Sweat House Media
Class 21 (Locobase 9702)
Data from [
], last accessed 30 November 2008. Also see "Locomotives of the Minho and Douro Railway, Portugal,"The Locomotive Magazine, Vol VIII (13 June 1903), pp. 409-410.
Originally purchased by the M e D as mixed-traffic locomotives, the class was known in Portugal as the Papa Almoto class. Like many Portuguese locomotives, these engines enjoyed long careers, the last of them operating in the Oporto area until retired in the 1960s.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 21 |
| Locobase ID | 9702 |
| Railroad | Minho e Douro |
| Country | Portugal |
| Whyte | 0-6-0 |
| Number in Class | 12 |
| Road Numbers | 21-32 |
| Gauge | 5'6" |
| Number Built | 12 |
| Builder | Beyer, Peacock |
| Year | 1875 |
| Valve Gear | Stephenson |
| 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) | 77,162 / 35,000 |
| Engine Weight (lbs / kg) | 77,162 / 35,000 |
| Tender Loaded Weight (lbs / kg) | 44,092 / 20,000 |
| Total Engine and Tender Weight (lbs / kg) | 121,254 / 55,000 |
| Tender Water Capacity (gals / ML) | 1848 / 7 |
| 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) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 111.70 / 770 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.39" x 24.02" / 467x610 |
| Tractive Effort (lbs / kg) | 15,123 / 6859.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.10 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 172 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 16.57 / 1.54 |
| Evaporative Heating Surface (sq ft / m2) | 1220 / 113.40 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1220 / 113.40 |
| Evaporative Heating Surface/Cylinder Volume | 165.21 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1851 |
| Same as above plus superheater percentage | 1851 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |