Baden IX a
| Baden IX a DR class 89 83 |
|
|---|---|
 No. 441
|
|
| Numbering: | DR 89 8301-8302 |
| Number: | 7th |
| Manufacturer: | MBG Karlsruhe |
| Year of construction (s): | 1887-1888 |
| Retirement: | until 1924 |
| Type : | C / b n2 (4) t C n2t |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 8980 mm |
| Height: | 4150 mm |
| Total wheelbase: | 3500 mm |
| Empty mass: | 33.70 t |
| Service mass: | 41.65 t |
| Friction mass: | 41.65 t |
| Wheel set mass : | 13.90 t |
| Top speed: | 40 km / h 12 km / h (cogwheel operation) |
| Driving wheel diameter: | 1080 mm |
| Gear system : | Bissinger-Klose |
| Number of drive gears: | 2 |
| Control type : | Stephenson |
| Cylinder diameter: | 356 mm |
| Piston stroke: | 550 mm |
| Cylinder d. Gear drive: | 315 mm |
| Piston stroke gear drive: | 500 mm |
| Boiler overpressure: | 10 bar |
| Number of heating pipes: | 173 |
| Heating pipe length: | 3380 mm |
| Grate area: | 1.34 m² |
| Radiant heating surface: | 6.75 m² |
| Tubular heating surface: | 84.65 m² |
| Evaporation heating surface: | 91.4 m² |
| Water supply: | 4 m³ |
| Fuel supply: | 1.5 tons of coal |
The IX a of the Grand Ducal Baden State Railroad were cogwheel freight train tender locomotives without running axles with three coupling axles , the cogwheel drive of which was designed for driving on rails with the Bissinger-Klose rack and pinion system . They were built for the section from Hirschsprung (Black Forest) to Hinterzarten of the Höllentalbahn in the Black Forest .
The Deutsche Reichsbahn took over two machines whose gear drive had already been removed. They were classified as class 89 83 in the numbering plan . The locomotives built in 1887/1888 were retired by 1924.
history
The Höllentalbahn had a gradient of 55 ‰ on a seven-kilometer section. In the 1880s, these gradients could only be overcome using racks. The locomotives should run through the entire route. That is why the Badische Staatsbahn acquired five locomotives in 1887 for mixed adhesion and cogwheel operation.
Based on a design by the Esslingen machine factory for the Halberstadt-Blankenburg railway , the Karlsruhe mechanical engineering company delivered five locomotives in 1886. Two more machines followed in 1887. Until 1900, the locomotives were the sole traction vehicles on the Höllentalbahn. The low power of the locomotives and the low permissible speeds quickly had a negative impact. The situation only improved with the use of the class VI b locomotives on the line. From this point on, the machines were used exclusively as push locomotives on the steep section. The volume of traffic increased further in the following years. In 1907, double covering was approved for the transport of longer trains, and from 1908 express trains ran on the Höllentalbahn. The only obstacle on the route was the rack section, which could only be driven on at limited speed. For this reason, four class IX b locomotives were purchased from 1910 .
The gear drive was then removed from the machines of type IX a, and the locomotives were used in shunting services. From 1921 all locomotives could be found in Freiburg im Breisgau . All locomotives were still listed in the preliminary re-drawing plan of the Deutsche Reichsbahn from 1923. Finally, two more copies were redrawn, but they were retired a short time later.
Constructive features
The locomotives had a sheet metal inner frame. A separate component between the frame cheeks was available for the gear drive.
The long boiler consisted of two shots. On the front shot sat the regulator dome with the Ramsbottom safety valve and the sandpit. On the back shot sat the steam dome with the Meggenhofen safety valve. The standing kettle had a semicircular ceiling. The copper fire box had a sloping ceiling and a sloping grate. The boiler was fed by two non-suction jet pumps.
The locomotive had two independent wet steam engines for adhesion and gear drive. The adhesion engine had two external, horizontally arranged cylinders. The middle coupling axle was driven. The engine had an external Stephenson control. The internal engine for the gear drive with two horizontally arranged cylinders drove the gearwheels via rocker arms. The wheels connected with coupling rods were arranged in such a way that two teeth on one wheel and one tooth on the other wheel always meshed with the rack. The engine had an Allan control.
The drive was supported at four points. The first and second wheel set had leaf springs above the axles and the third wheel set below the axles. The springs of the second and third wheel sets were connected by a balance lever. Since the gear drive had to be accommodated, the distance between the first two axes was 2.13 m and between the second and third axis only 1.37 m.
The two engines each had a handbrake. The Riggenbach counter pressure brake had a silencer. The brake of the gear drive was designed as a band brake. A Schmidt helical wheel brake was used as the car brake. The middle wheel set was braked from both sides. The locomotives were later given an air brake.
The sand spreader sanded the drive wheel set from the front. The locomotive also had wheel flange lubrication , a Latowski sound system and a steam heating system.
Web links
literature
- Hermann Lohr, Georg Thielmann: Baden locomotive archive . transpress, Berlin 1988, ISBN 3-344-00210-4 .
- Manfred Weisbrod, Hans Müller, Wolfgang Petznick: German Locomotive Archive: Steam Locomotives 3 (Series 61 - 98) . transpress, Berlin 1994, ISBN 3-344-70841-4 .