C.F. Franco Ethiopien Beyer-Garratt Locomotives in Ethiopia
Class Details by Steve Llanso of Sweat House Media
Class 501 (Locobase 506)
Data from JP Crozet's Franco-Ethiopian Railway site, [
], last accessed on 21 February 2009. Ansaldo works numbers 1371-1376.
These are the only Garratts Ansaldo built. Its exhaust stack was a Kylchap.
The tube heating surface area calculated from the inside diameters of 45 mm (1.77") for the tubes and 126 mm (4.96") for the flues was 1,277 sq ft (118.65 sq m) and a total heating surface area of 1,442 sq ft (134 sq m). That is the figure given in the source's diagram. Locobase's entry uses the outside diameters
The Ethiopian railways on which they ran were overseen by the Italian government, which had invaded Ethiopia in 1935. Only the first three in the Ansaldo order actually arrived in Ethiopia and, while they weren't as popular as the Mallets running in that country, they did carry on until 1959.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 501 |
| Locobase ID | 506 |
| Railroad | C.F. Franco Ethiopien |
| Country | Ethiopia |
| Whyte | 2-8-2+2-8-2 |
| Number in Class | 3 |
| Road Numbers | 501-503 |
| Gauge | 95 cm |
| Number Built | 3 |
| Builder | Ansaldo |
| Year | 1939 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.81 / 3.60 |
| Engine Wheelbase (ft / m) | 15.52 / 4.73 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.76 |
| Overall Wheelbase (engine & tender) (ft / m) | 33.14 / 10.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 132,277 / 60,000 |
| Engine Weight (lbs / kg) | 190,700 / 86,500 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 3168 / 12 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 41.30 / 1050 |
| Boiler Pressure (psi / kPa) | 200.20 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.96" x 21.65" / 380x550 (4) |
| Tractive Effort (lbs / kg) | 39,929 / 18111.51 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.31 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 119 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | 28 - 5.236" / 133 |
| Flue/Tube length (ft / m) | 13.94 / 4.25 |
| Firebox Area (sq ft / m2) | 164.90 / 15.80 |
| Grate Area (sq ft / m2) | 32.29 / 3 |
| Evaporative Heating Surface (sq ft / m2) | 1555 / 144.45 |
| Superheating Surface (sq ft / m2) | 565 / 52.50 |
| Combined Heating Surface (sq ft / m2) | 2120 / 196.95 |
| Evaporative Heating Surface/Cylinder Volume | 176.52 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6464 |
| Same as above plus superheater percentage | 8210 |
| Same as above but substitute firebox area for grate area | 41,926 |
| Power L1 | 11,677 |
| Power MT | 1556.94 |