MÁV series Bmot
| MÁV series Bmot | |
|---|---|
 Bmot
|
|
| Numbering: | MÁV: Bmot 1–5 |
| Number: | MÁV: 5 |
| Manufacturer: | Ganz & Co. , Budapest |
| Year of construction (s): | 1928-1931 |
| Retirement: | after 1950 |
| Axis formula : | 1A |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 12,700 mm |
| Total wheelbase: | 7,000 mm |
| Service mass: | 19.2 t |
| Friction mass: | 9.6 t |
| Wheel set mass : | 11.5 t |
| Top speed: | 75 km / h |
| Installed capacity: | 70 hp |
| Wheel diameter: | 920 mm |
| Motor type: | Ganz & Co. Jendrassik VI JmR 130 |
| Motor type: | Six-cylinder four-stroke diesel engine |
| Rated speed: | 1,000 / min |
| Power transmission: | mechanically |
| Brake: | Pneumatic brake Knorr handbrake |
| Seats: | 43 |
| Classes : | 2. |
The vehicles of the MÁV series Bmot were two-axle railcars for the branch line traffic of the Hungarian State Railways (MÁV). They are considered to be the first MAV vehicles to be equipped with a diesel engine.
history
In 1928, Ganz & Co. delivered the first diesel-mechanical railcars to the Danube-Adria-Bahn . The vehicles were supposed to handle the feeder traffic between the express trains at Lake Balaton and to replace the previously used rail buses , which could only travel in one direction. By 1931, the Ganz works had delivered a total of five vehicles from this series. With a top speed of 75 km / h, they were able to provide express train services.
Mainly they were used between Budapest Südbahnhof and Balatonfüred . The vehicles, first designated as DSA 1-5 , were later given the designations Bmot 415-417 and Bmot 432-433 . They differed in their motorization. After complaints about the equipment of the vehicles, the seating, originally made of wooden slats, was replaced with upholstered seats.
After the Second World War, there were only four vehicles left in Hungary in 1947 , the Bmot 415-417 and Bmot 432 . They belonged to the Budapest Keleti pu plant . Only one of them is said to have been operational, the fifth railcar remained with the ČSD . The vehicles were last mentioned in 1956.
technical description
The lightweight, sheet-metal-clad steel frame vehicles had 43 seats. These could be folded down depending on the direction of travel. At both ends of the railcar were the driver's cabs that served as entry areas, including the toilets.
For the first time a diesel engine was used in the MÁV railcars with the Ganz Jendrassik VI JmR 130, from which all other types of diesel engines were later derived. He worked for the precombustion and developed 70 hp at 1,000 rpm -1 . The crankshaft had plain bearings , as did the camshaft and the connecting rods. The amount of fuel to be injected was regulated by the piston stroke of the diesel injection pump. The engine was lubricated by circulating oil . The engine was started electrically.
The power transmission was realized with a four-speed gearbox from Ganz, as had been tried out on the previously delivered railcars. The engine had a water cooling system with which the passenger compartment was heated.
See also
literature
- Mihály Kubinszky (ed.): Hungarian locomotives and railcars. Akadémiai Kiadó, Budapest 1975, ISBN 963-05-0125-2 .