Data from JP Crozet's Franco-Ethiopian Railway site, [], last accessed on 21 February 2009. Works numbers were 6551-6559.
Data from JP Crozet's Franco-Ethiopian Railway site, [], last accessed on 21 February 2009; and UG 185 "Locomotive surchauffe Type Consolidation" SACM Locomotive Diagrams supplied in 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 7572-7577 in 1930; 7723-7725, 7729-7734, 7735-7740.
Belpaire firebox. Only the first six were named: GorT, Gondar, Djidjiga, Ankobar, DirT Dawa, and Addis-Abeba.
Data from JP Crozet's Franco-Ethiopian Railway site, [], first accessed on 21 February 2009, later accessed at [], 16 September 2025Works numbers ran 6165-6172.
Engine 25 was named Brave and 26 took the name Invincible. Crozet noted SACM's Belfort works produced these cross-compound Consolidations based on the plans used for the earlier 2-8-0 delivered in 1909.
Data from JP Crozet's Franco-Ethiopian Railway site, [], first accessed on 21 February 2009, later accessed at [], 16 September 2025; and "UG Type 174, Locomotive a surchauffe type Consolidation", SACM diagrams supplied in 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works numbers were 7451-7456 in 1927, 7541-7544 in 1929, and 7726-7728 in 1937.
Belpaire firebox. The first ten had names: Choa, Godjam, Aroussis, Wello, Djimma, Tchercher, Tigre, Kaffa, Sidamo, and Harrar. Crozet commented on a flaw "caused some trouble related to the very uneven loading of the driven axles", apparently referring to the three delivered in 1937. He added that the CFE expressed its "dissatisfaction" by buying six more locomoties from SLM of Winterthur, Switzerland.
The CFE's experience with American-built "MacArthur" metre-gauge engines led the railway to convert the entire 410 class to oil fuel.
Heating surface area in the specification uses the water-side diameter of 133 mm. When calculated based on the inner diameter of 125 mm, the tube heating surface area came to 85.55 sq m (921 sq ft) and total evaporative heating surface area 95.9 sq m (1,032 sq ft).
| Principal Dimensions by Steve Llanso of Middle Run Media | ||||
|---|---|---|---|---|
| Class | 121 | 131 | 25 | 401 |
| Locobase ID | 9968 | 9972 | 9967 | 9973 |
| Railroad | C.F. Franco Ethiopien | C.F. Franco Ethiopien | C.F. Franco Ethiopien | C.F. Franco Ethiopien |
| Country | Ethiopia | Ethiopia | Ethiopia | Ethiopia |
| Whyte | 2-8-0 | 2-8-0 | 2-8-0 | 2-8-0 |
| Number in Class | 8 | 24 | 8 | 13 |
| Road Numbers | 121-128 | 131-151, 232-234 | 181/25-32 | 401-413 |
| Gauge | 95 cm | 95 cm | 95 cm | 95 cm |
| Number Built | 8 | 24 | 8 | 13 |
| Builder | SACM | SACM | SACM | SACM |
| Year | 1913 | 1931 | 1913 | 1927 |
| Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert |
| Locomotive Length and Weight | ||||
| Driver Wheelbase (ft / m) | 11.81 / 3.60 | 11.81 / 3.60 | 14.11 / 4.30 | |
| Engine Wheelbase (ft / m) | 21.59 / 6.58 | 21.59 / 6.58 | 18.24 / 5.56 | 20.67 / 6.30 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 | 0.55 | 0.68 | |
| Overall Wheelbase (engine & tender) (ft / m) | 18.24 / 5.56 | |||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||||
| Weight on Drivers (lbs / kg) | 68,343 / 31,000 | 71,430 / 32,400 | 65,036 / 29,500 | 88,185 / 40,000 |
| Engine Weight (lbs / kg) | 81,571 / 37,000 | 85,098 / 38,600 | 76,170 / 34,550 | 101,413 / 46,000 |
| Tender Loaded Weight (lbs / kg) | 67,241 / 30,500 | |||
| Total Engine and Tender Weight (lbs / kg) | 152,339 / 69,100 | |||
| Tender Water Capacity (gals / ML) | 3696 / 14 | |||
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 | |||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 | 30 / 15 | 27 / 13.50 | 37 / 18.50 |
| Geometry Relating to Tractive Effort | ||||
| Driver Diameter (in / mm) | 39.40 / 1000 | 39.80 / 1010 | 39.40 / 1000 | 41.30 / 1050 |
| Boiler Pressure (psi / kPa) | 169.70 / 1170 | 186.60 / 1270 | 184.20 / 1270 | 170.40 / 1160 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 21.65" / 400x550 | 15.75" x 21.65" / 400x550 | 16.54" x 21.65" / 420x550 (1) | 18.5" x 21.65" / 470x550 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 24.8" x 21.65" / 630x550 (1) | |||
| Tractive Effort (lbs / kg) | 19,662 / 8918.54 | 21,403 / 9708.25 | 16,290 / 7389.03 | 25,986 / 11787.07 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.48 | 3.34 | 3.99 | 3.39 |
| Heating Ability | ||||
| Tubes (number - dia) (in / mm) | 118 - 1.772" / 45 | 103 - 1.772" / 45 | 138 - 1.772" / 45 | 102 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | 12 - 5.236" / 133 | 16 - 5.236" / 133 | 18 - 5.236" / 133 | |
| Flue/Tube length (ft / m) | 11.48 / 3.50 | 12.47 / 3.80 | 13.94 / 4.25 | |
| Firebox Area (sq ft / m2) | 81.81 / 7.60 | 64.58 / 6 | 110.87 / 10.30 | |
| Grate Area (sq ft / m2) | 16.14 / 1.50 | 16.15 / 1.50 | 19.38 / 1.80 | 20.56 / 1.91 |
| Evaporative Heating Surface (sq ft / m2) | 889 / 82.60 | 878 / 81.60 | 803 / 74.60 | 1122 / 104.25 |
| Superheating Surface (sq ft / m2) | 208 / 19.30 | 271 / 25.20 | 338 / 31.40 | |
| Combined Heating Surface (sq ft / m2) | 1097 / 101.90 | 1149 / 106.80 | 803 / 74.60 | 1460 / 135.65 |
| Evaporative Heating Surface/Cylinder Volume | 182.10 | 179.85 | 298.29 | 166.58 |
| Computations Relating to Power Output (More Information) | ||||
| Robert LeMassena's Power Computation | 2739 | 3014 | 3570 | 3503 |
| Same as above plus superheater percentage | 3259 | 3737 | 3570 | 4309 |
| Same as above but substitute firebox area for grate area | 18,930 | 11,896 | 23,237 | |
| Power L1 | 9447 | 2250 | 8216 | |
| Power MT | 1166.29 | 305.09 | 821.60 | |