CFE series M
| CFE series M | |
|---|---|
 Locomotive 2M on the Holl Holl bridge
|
|
| Numbering: | 1M-12M |
| Number: | 12 |
| Manufacturer: | SLM, BBC |
| Year of construction (s): | 1950-1951 |
| Retirement: | circa 1990 |
| Axis formula : |
Abgel .: (Ao1Ao) '(Ao1Ao)' from 1963/64: Bo'Bo ' |
| Gauge : | 1000 mm ( meter gauge ) |
| Length over coupling: | 11,000 mm |
| Height: | 3,035 |
| Trunnion Distance: | 5,660 mm |
| Bogie axle base: | 2,200 mm |
| Total wheelbase: | 8,010 mm |
| Service mass: | 50.4 t |
| Friction mass: | 33.6 t |
| Wheel set mass : |
Delivered: 8 t from 1963/64: 12.5 t |
| Top speed: |
Freight traffic: 65 km / h Passenger traffic: 90 km / h |
| Installed capacity: | 750 hp |
| Traction power: | 580 hp |
| Starting tractive effort: |
Freight transport: 9,820 kg.Passenger transport: 7,200 kg |
| Driving wheel diameter: | 840 mm |
| Impeller diameter: | 710 mm |
| Motor type: | 6 VD 25 THTr |
| Motor type: | 1 six-cylinder diesel engine with exhaust gas turbocharger |
| Rated speed: | 750 rpm |
| Power transmission: | electric |
| Number of traction motors: | 4th |
| Drive: | Paw camp |
| Translation levels: |
Freight traffic: 1: 5.69 Passenger traffic: 1: 4.12 |
| Brake: | Vacuum brake |
In 1950, the Compagnie de Chemin de Fer Franco-Ethiopien de Jibuti à Addis Abeba ( CFE ) procured a total of 12 diesel locomotives from the Swiss Locomotive and Machine Factory in Winterthur . They are listed as the M series ; depending on the language, the designation M or Type M is also used. The name is derived from Service m archandises .
history
In 1945, the CFE intended to modernize its fleet of locomotives with diesel locomotives from SLM. Originally it was planned to purchase six double locomotives with 1340 hp. The order was placed on December 31, 1946, but was converted in July 1948 into five diesel locomotives for express trains of the V series for service v oyageurs and seven locomotives of the M series for freight trains. The locomotives should have the designations 1V to 5V and 6M to 12M. A year later, the order was changed again to a passenger locomotive and eleven freight locomotives. After the 1V derailed during test drives, the project for a passenger locomotive was dropped and all twelve locomotives were delivered as freight locomotives.
Technical
The locomotive has a drive with a gear ratio that can be converted in the workshop . For this purpose, the gear wheels of the transmission were designed in two parts, so that they could be changed without pressing the wheels off. The ratio of 1: 4.12 was used for passenger transport , with the vehicle reaching a top speed of 90 km / h with 7200 kg pulling force. The 1: 5.69 was used in freight transport , the maximum speed being 65 km / h with 9820 kg pulling force.
Because of the poor superstructure , the axle pressure had to be limited to 8 tons, which is why two three-axle bogies with two drive axles and one running axle each were installed. The running axles were removed in the Dire Dawa workshop in 1963 and 1964 after the superstructure was reinforced for 12.5 t axle load.
As a result of the extreme climatic conditions (from the sea through the desert up to 2,355 meters above sea level), special measures had to be taken. In this way, the intake air for the diesel engine, as well as generators and traction engines , is filtered. A slight overpressure is generated in the machine room to prevent dust from entering. Filtered air is also supplied to the driver's cab . The driver's cab is only on one side of the consistently wide car body . At the end of the driver's cab, the car body is specially reinforced and has a distinctive cow catcher to be prepared for a collision with large animals. At the other end are the oil and water coolers , which have to be very large in order to provide sufficient performance at an ambient temperature of 50 °. In between is the six-cylinder diesel engine with a flange-mounted generator and auxiliary generator. The motor has bores with a diameter of 250 mm and a piston stroke of 300 mm. Each drive axle has its own DC - traction motor .
The electrical equipment was manufactured by BBC and installed by SLM. The box is supported by two spherical pivot pins. These lie in the swivel pans, which are suspended horizontally in the bogie frame . There are springy side supports for support. The diesel oil tank is located below the car body between the bogies.
Operational
Because the locomotive only had a driver's cab at one end, it was often used in double traction .
Individual evidence
- ↑ a b c d The diesel locomotives SLM Winterthur and Brown Boveri & Co. In: Le Chemin de Fer Franco Ethiopien et Djibouto Ethiopia - Djibouti Addis-Ababa. Retrieved April 2, 2017 .