DR series 97.4 (1942)
| DR class 97.4 ÖBB 297 |
|
|---|---|
 297,401
|
|
| Numbering: | 97 401-402 297,401-402 |
| Year of construction (s): | 1942 |
| Type : | 1'F1 'h2zz (2) t |
| Length: | 14,800 mm |
| Height: | 4650 mm |
| Total wheelbase: | 11,450 mm |
| Service mass: | 125.0 t |
| Top speed: | 30 km / h (z = 25 km / h) |
| Driving wheel diameter: | 1050 mm |
| Impeller diameter front: | 750 mm |
| Rear wheel diameter: | 750 mm |
| Gear system : | Dept |
| Number of drive gears: | 688 mm |
| Cylinder diameter: | 610 mm |
| Piston stroke: | 520 mm |
| Cylinder d. Gear drive: | 400 mm |
| Piston stroke gear drive: | 500 mm |
| Boiler overpressure: | 16 bar |
| Number of heating pipes: | 150 |
| Number of smoke tubes: | 34 |
| Heating pipe length: | 5200 mm |
| Grate area: | 3.90 m² |
| Radiant heating surface: | 15.70 m² |
| Tubular heating surface: | 195.20 m² |
| Superheater area : | 72.50 m² |
The vehicles of the DR series 97.4 were gear - tank locomotives of the Deutsche Reichsbahn , intended for use on the Erzbergbahn in Styria had been designed. The two vehicles built were later given the series designation 297 by the Austrian Federal Railways (ÖBB) .
history
In 1942, after a long development period, two copies of a steam locomotive were delivered for the Erzbergbahn, which outperformed the previous series 69 and 269 . The new series had the axle arrangement 1'F1 '(that is one leading and one trailing axle and six coupled driving axles in between) and was intended as "Series 369" of the BBÖ , the predecessor of today's Austrian Federal Railways (ÖBB). Since the BBÖ had meanwhile been taken over by the Deutsche Reichsbahn, the (German) series designation 97.4 was chosen - in the second occupation, the series designation had already been used once for the DR 97 401 , which has now been sold - and the locomotives were given the road numbers 97 401-402 .
Although the machines had three times the performance of the original ore mountain railway locomotives, the 97 series , they were unsatisfactory. There were constant technical problems that resulted in long stays in the main workshop. Because of their mass, the machines could only be used on the Erzberg southern ramp between Vordernberg and the Erzberg.
The 97 402 was parked as early as 1949 and used as a spare parts dispenser. The 97 401 (at the ÖBB the two locomotives were assigned the numbers 297.401-402) was only in operation until 1964.
The type was the most powerful, but also the most elaborate gear steam locomotive in the world. Both machines were cashed in 1968, the 297,401 has been a memorial in Vordernberg since 1976 .
297,401, right side
See also
literature
- Dieter Zoubek: Preserved steam locomotives in and from Austria. Self-published, 2004, ISBN 3-200-00174-7 .
- Arthur Meyer, Josef Pospichal: Rack railway locomotives from Floridsdorf. Verlag bahnmedien.at, Vienna 2012, ISBN 978-3-9503304-0-3