DR 872 to 874
| DR 872-874 | |
|---|---|
 VT_872 advertising poster
|
|
| Numbering: |
DRG : 872-874 DB: VT 92 501 |
| Number: | 3 |
| Manufacturer: | Wismar wagon factory |
| Year of construction (s): | 1932 |
| Retirement: | after 1951 |
| Type : | 2'Bo 'de |
| Genre : | BC4ivT |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 22,140 mm |
| Length: | 20,830 mm |
| Height: | 3,765 mm |
| Width: | 2,885 mm |
| Trunnion Distance: | 14,270 mm |
| Bogie axle base: | Machine bogie: 4,100 mm. Motor bogie: 2,600 mm |
| Total wheelbase: | 17,670 mm |
| Empty mass: | 52,000 kg |
| Service mass: | 60,700 kg (occupied) |
| Top speed: | 90 km / h |
| Installed capacity: | 302 kW (410 hp) |
| Driving wheel diameter: | 1,000 mm |
| Impeller diameter: | 850 mm |
| Motor type: | Maybach GO 5 |
| Motor type: | Twelve-cylinder four-stroke diesel engine |
| Rated speed: | 1,400 rpm |
| Power transmission: | electric |
| Brake: | Compressed air brake type Knorr |
| Seats: | 2nd class 16 3rd class 56 |
| Standing room: | 44 |
| Floor height: | 1,310 mm |
| Classes : | 2nd, 3rd |
The express train multiple units DR 872 to 874 are the first combustion engine multiple units of the Deutsche Reichsbahn to be equipped with the diesel engine Maybach GO 5 . At 52 t they were the heaviest diesel multiple units in the Deutsche Reichsbahn.
The vehicles were procured for express train operation between Frankfurt am Main and Wiesbaden with a control car and, in this composition, were the first push-pull trains in Germany. After that, only vehicles with lightweight bodies were produced by the Deutsche Reichsbahn.
history
The manufacturer Waggonfabrik Wismar used a car body that corresponded to the DR 853 ... 871 for the first internal combustion engine railcars of the Deutsche Reichsbahn . With the new Maybach GO 5 engine , the prerequisites had been created for building vehicles with speeds of 90-100 km / h that could carry a sidecar. When they were built, the vehicles received a lot of attention, and they are shown on the front page of an advertising poster for the Wismar wagon factory.
The vehicles were ordered in 1930. They were delivered in 1932 and 1933. When they were commissioned, they were equipped with a GO-5 engine , in which the fuel was injected with a compressor. It was not until 1935 that the naturally aspirated engine used in the other vehicles was installed, which meant that the repair shop took longer to park . In addition to the railcars, one express train car was converted into a control car. With this car the railcars were operated as a push-pull train.
After commissioning at the Frankfurt (Main) depot, the vehicles served the Frankfurt am Main – Wiesbaden route until the outbreak of World War II . The mileage of the vehicles was not particularly high. The reason for this was that the distance between the terminal stations was small, which meant that no guarantees for a long service life of the engines could be made. In addition, the time it takes to convert from a compressor motor to a compressor-less motor in the repair shop must be taken into account. At least two vehicles were misused before the end of the war as plan chambers or brake inspection vehicles.
Only the VT 872 reappeared in the inventory lists after the war. It was designated as the VT 92 501 and equipped with a new Maybach machine system with an output of 800 hp. The vehicle was delivered again in June 1951.
Constructive features
The car body was taken over from the DR 853 ... 871 series. For the first time, a diesel-electric drive system with the storage of the diesel engine in the machine bogie and the two electric traction motors in the other bogie of the car was chosen. The diesel engine was started with compressed air.
After 1938, it was planned to install a more powerful diesel engine made by Klöckner-Humboldt-Deutz , which could deliver 450 hp. At least the VT 872 received this engine; the other two vehicles were no longer converted due to the war.
The operation brought the realization that the vehicles, which had a low specific power, were not yet able to operate effectively on main lines. This led to the revision of the car body in order to use the more powerful engine more effectively. These vehicles were therefore important sources of knowledge for lightweight construction in vehicle construction.
literature
- Heinz Kurz: The railcars of the Reichsbahn-Bauarten , EK-Verlag Freiburg, 1988, ISBN 3-88255-803-2 .
Web links
Individual evidence
- ↑ Heinz Kurz: The railcars of the Reichsbahn-Bauarten , EK-Verlag, Freiburg 1988, ISBN 3-88255-803-2 , page 234
- ↑ Heinz Kurz, The railcars of the Reichsbahn-Bauarten , EK-Verlag, Freiburg, 1988, ISBN 3-88255-803-2 , page 235
- ↑ a b Heinz Kurz: The railcars of the Reichsbahn-Bauarten , EK-Verlag, Freiburg 1988, ISBN 3-88255-803-2 , page 236
- ↑ Heinz Kurz: The railcars of the Reichsbahn types , EK-Verlag, Freiburg 1988, ISBN 3-88255-803-2 , page 237