| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 55 |
| Locobase ID | 21240 |
| Railroad | Beira Alta |
| Country | Mozambique |
| Whyte | 2-6-0 |
| Number in Class | 4 |
| Road Numbers | 55 |
| Gauge | 5'6" |
| Number Built | 4 |
| Builder | Borsig |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.98 / 3.65 |
| Engine Wheelbase (ft / m) | 19.85 / 6.05 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.60 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 107,000 / 48,534 |
| Engine Weight (lbs / kg) | 129,000 / 58,513 |
| Tender Loaded Weight (lbs / kg) | 96,000 / 43,545 |
| Total Engine and Tender Weight (lbs / kg) | 225,000 / 102,058 |
| Tender Water Capacity (gals / ML) | 4800 / 18.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 24.75" / 470x629 |
| Tractive Effort (lbs / kg) | 19,429 / 8812.86 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.51 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 238 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12 / 3.66 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 24.50 / 2.28 |
| Evaporative Heating Surface (sq ft / m2) | 1620 / 150.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1620 / 150.50 |
| Evaporative Heating Surface/Cylinder Volume | 210.39 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4165 |
| Same as above plus superheater percentage | 4165 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |