HBE animal class
| HBE "animal class" series 95.66 |
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|---|---|
 95 6676 ex MAMMUT Rübeland 11.05.08
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| Numbering: |
MAMMOTH, WISENT, BUFFALO, ELK DR 95 6676–6679 |
| Number: | 4th |
| Manufacturer: | Borsig |
| Year of construction (s): | 1919-1921 |
| Retirement: | 1951-1970 |
| Type : | 1'E1 'h2t |
| Genre : | Gt 57.16 |
| Length over buffers: | 12,450 mm |
| Total wheelbase: | 9550 mm |
| Empty mass: | 90.0 t |
| Service mass: | 102.5 t |
| Friction mass: | 81.7 t |
| Wheel set mass : | 16.3 t |
| Top speed: | 50 km / h |
| Starting tractive effort: | 257.25 kN |
| Coupling wheel diameter: | 1100 mm |
| Impeller diameter front: | 850 mm |
| Rear wheel diameter: | 850 mm |
| Cylinder diameter: | 700 mm |
| Piston stroke: | 550 mm |
| Boiler overpressure: | 14 bar |
| Grate area: | 3.96 m² |
| Superheater area : | 54.14 m² |
| Evaporation heating surface: | 180.86 m² |
| Water supply: | 8.8 m³ |
| Fuel supply: | 3.0 tons of coal |
| Locomotive brake: | Knorr compressed air brake Riggenbach counter pressure brake gear brake |
The animal class locomotives of the Halberstadt-Blankenburg Railway (HBE) are four tank locomotives , which were named MAMMUT , WISENT , BÜFFEL and ELCH . After the HBE was taken over by the Deutsche Reichsbahn in 1949, the locomotives were given the operating numbers 95 6676 to 95 6679 . By using the animal class machines, the HBE was able to convert its steep sections , which had previously been operated as a cogwheel railway , to exclusive operation as an adhesion railway .
prehistory
Due to the increased transport volume due to the First World War, the HBE was prompted to replace its outdated cogwheel locomotives. As a replacement, Borsig and his chief designer August Meister offered a 1'D1 'gear or 1'E1' adhesion locomotive . The decision was made for the adhesion locomotive and two machines were ordered. You should be able to move the increased mass of trains at an appropriate speed. However, brake gears were installed in this, as there was fear that on the ramps of 60 ‰ that had to be mastered, the friction values could be exceeded when going downhill and the train could slip. Since the 1917 project was considered particularly important due to the possibility of replacing the cogwheel locomotives with the state railways, the plans were swiftly endorsed by the Reich Railway Authority and approved by the vehicle committee in the technical staff of the War Ministry .
commitment
The first factory test drive took place on February 4, 1920, and regular use from the beginning of March. During testing, however, the gear brake frame proved to be dispensable. It was subsequently removed from both locomotives and no longer installed in the "Elch" and "Buffalo" machines that were only delivered in 1921. Its use would also have hindered operation, the speed of 30 km / h possible in friction mode during the descent in the steep sections would have been too high for the gears. In the period that followed , extensive test drives were carried out by the Grunewald Locomotive Testing Office , which was headed by Richard Paul Wagner at the time . The machines in the animal class were able to carry tensile loads of 260 t at 12 km / h on the 60 ‰ gradients of the HBE. The results of the test drives led to the procurement of the Prussian T 20 , classified as Class 95 by the Deutsche Reichsbahn , with which cogwheel operation could also be ended on many lines of the Reichsbahn.
In 1949, due to the nationalization of the HBE, the locomotives became part of the Deutsche Reichsbahn . 95 6679 (ex ELCH ) was the first to retire from service when the boiler in the Meiningen raw material cracked in 1951 . 95 6676 (ex MAMMUT ) is now part of the non-operational inventory of the Dresden Transport Museum .
Constructive features
The machines received a bar frame. The wheel sets were designed as Bissel axles with 125 mm side play. The second and fifth coupling axle were laterally displaceable by 30 mm and the third coupling axle was designed without flange. A Heusinger control modified by Borsig was installed as a control. In order to achieve a sufficiently large boiler despite the short length of the locomotive, the boiler was designed with a pipe length of 3700 mm with a considerable diameter of 2000 mm. Borsig installed a compressed air sand spreader for the first time so that all coupled wheel sets could be sanded in both directions.
The brake cogwheels of the cogwheel brake frame, which was only installed in the “Mammut” and “Wisent” locomotives, were in front of and behind the drive axle. They could be raised for the ascent so that the rack entrances and exits would not have to be passed at low speed. The gear brake frame rested unsprung on the axle shafts with its own support bearings, comparable to the gear drive frames customary at the time.
literature
- Manfred Weisbrod, Hans Wiegard: German Locomotive Archive: Steam Locomotives 6 (standard gauge private railway locomotives at the DR) . transpress, Berlin 1998, ISBN 3-344-71044-3 .
- Hans-Dieter Rammelt, Günther Fiebig, Erich Preuß : Archive of German Small and Private Railways: History of Small and Private Railways. Development • Construction • Operation . extended Edition. Transpress Verlagsgesellschaft mbH, Berlin 1995, ISBN 3-344-71007-9 , p. 223-226 .
- Dirk Endisch: The HBE mountain locomotives: The history of the 75 66 , 75 67 , 92 68 , 93 67 and 95 66 series . 1st edition. Verlag Dirk Endisch, Stendal 2010, ISBN 978-3-936893-57-1 .
- Werner Steinke: Transpress traffic history, The Rübelandbahn . 1st edition. Transpress Verlag for Transport, Berlin 1982, p. 95-109 .
Individual evidence
- ↑ Alfred B. Gottwaldt : History of the German standard locomotives. The steam locomotives of the Reichsbahn and their designers . Franckh'sche Verlagshandlung, Stuttgart 1978, Reprint Kosmos, Stuttgart 1999, ISBN 3-440-07941-4 , p. 22
- ^ Karl-Ernst Maedel , Alfred B. Gottwaldt : German steam locomotives. The history of development . Transpress Verlag, Stuttgart 1994/1999, ISBN 3-344-70912-7 , p. 215
- ^ Photo of 95 6679 after the kettle crash in 1951 at the Joachim Schmidt Railway Foundation
