Data from JP Crozet's Franco-Ethiopian Railway site, [], last accessed on 21 February 2009.
These were examples of the US Army Transportation Corps' meter-gauge Mikados (Locobase 434) as built by one of the smallest US steam locomotive builders. They served the CFE until 1960, when they were replaced by diesels.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 421 |
| Locobase ID | 9975 |
| Railroad | C.F. Franco Ethiopien |
| Country | Ethiopia |
| Whyte | 2-8-2 |
| Number in Class | 6 |
| Road Numbers | 421-426 |
| Gauge | Metre |
| Number Built | 6 |
| Builder | Davenport |
| Year | 1947 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.50 / 4.11 |
| Engine Wheelbase (ft / m) | 28.25 / 8.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 80,248 / 36,400 |
| Engine Weight (lbs / kg) | 119,931 / 54,400 |
| Tender Loaded Weight (lbs / kg) | 95,901 / 43,500 |
| Total Engine and Tender Weight (lbs / kg) | 215,832 / 97,900 |
| Tender Water Capacity (gals / ML) | 4990 / 18.90 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 21,760 / 9870.18 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.69 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 95 - 2" / 51 |
| Flues (number - dia) (in / mm) | 19 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 16.50 / 5.03 |
| Firebox Area (sq ft / m2) | 113 / 10.50 |
| Grate Area (sq ft / m2) | 27.55 / 2.56 |
| Evaporative Heating Surface (sq ft / m2) | 1365 / 126.86 |
| Superheating Surface (sq ft / m2) | 439 / 40.80 |
| Combined Heating Surface (sq ft / m2) | 1804 / 167.66 |
| Evaporative Heating Surface/Cylinder Volume | 244.40 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5510 |
| Same as above plus superheater percentage | 6832 |
| Same as above but substitute firebox area for grate area | 28,024 |
| Power L1 | 16,848 |
| Power MT | 1851.43 |