Companhia dos Caminhos de Ferro de Beira Alta 2-4-0 Locomotives in Portugal
Class Details by Steve Llanso of Sweat House Media
Class BA 21 (Locobase 11203)
Data from [
], last accessed 13 April 2010.
These Austrian engines were typical 2-4-0 passenger locomotives of the time. The design put the large steam dome just behind the stack and just ahead of a smaller sand dome that supplied sand to the first axle. The safety valves were located on the firebox under the cab roof.
By the time the state-run Companhia dos Caminhos de Ferro de Portugueses (CP) took over the BA in 1948, 4 of the class had been retired. The CP lost little time in disposing of the other 4.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | BA 21 |
| Locobase ID | 11203 |
| Railroad | Companhia dos Caminhos de Ferro de Beira Alta |
| Country | Portugal |
| Whyte | 2-4-0 |
| Number in Class | 8 |
| Road Numbers | 21-28 |
| Gauge | 5'6" |
| Number Built | 8 |
| Builder | Wiener Neustadt |
| Year | 1881 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.68 / 1.73 |
| Engine Wheelbase (ft / m) | 11.48 / 3.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 71,871 / 32,600 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 65 / 1650 |
| Boiler Pressure (psi / kPa) | 130.50 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.93" x 24.02" / 430x610 |
| Tractive Effort (lbs / kg) | 11,749 / 5329.26 |
| 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) | 13.94 / 4.25 |
| Firebox Area (sq ft / m2) | 75.32 / 7 |
| Grate Area (sq ft / m2) | 16.57 / 1.54 |
| Evaporative Heating Surface (sq ft / m2) | 1275 / 118.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1275 / 118.50 |
| Evaporative Heating Surface/Cylinder Volume | 203.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2162 |
| Same as above plus superheater percentage | 2162 |
| Same as above but substitute firebox area for grate area | 9829 |
| Power L1 | 3731 |
| Power MT | |