Bavarian Pt 2/3
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Bavarian Pt 2/3 DR series 70.0 ÖBB 770 |
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| Numbering: | 6001–6002 DR 70 001–002 |
6003-6091 DR 70 003-091 |
6092-6097 DR 70 092-097 |
| Number: | 97 | ||
| Manufacturer: | Krauss | ||
| Years of construction: | 1909-1916 | ||
| Retirement: | until 1963 | ||
| Design type: | 1B h2 or 1'B h2 | ||
| Gauge : | 1,435 mm | ||
| Length over buffers: | 9,065 mm | 9,165 mm | 9,265 mm |
| Service mass: | 38.4 t | 39.5 t | 39.9 t |
| Friction mass: | 27.2 t | 28.3 t | 28.4 t |
| Wheel set mass : | 13.6 t | 14.1 t | 14.2 t |
| Top speed: | 65 km / h | ||
| Indexed performance: | 310 kW | ||
| Driving wheel diameter: | 1,250 mm | ||
| Impeller diameter (front): | 850 mm | 1,006 mm | |
| Number of cylinders: | 2 | ||
| Cylinder diameter: | 375 mm | ||
| Piston stroke: | 500 mm | ||
| Boiler overpressure: | 12 bar | ||
| Grate area: | 1.22 m² | ||
| Superheater area : | 18.40 m² | ||
| Evaporation heating surface: | 58.10 m² | ||
| Locomotive brake: | Westinghouse air brake acting on the 1st coupled wheel set from the front and the 2nd coupled wheel set from the rear; Cast lever brake in the driver's cab | ||
The steam locomotives of the class Pt 2/3 of the Royal Bavarian State Railroad were two-cylinder superheated steam tank locomotives for light passenger trains. They were manufactured by Krauss between 1909 and 1915. With their characteristic design of the running axis far in front and two dome axles located under the standing boiler, they prevailed over the comparable type Bavarian Pt 2/4 N and, after the original operational requirements were no longer met , they were able to hold onto southern German branch lines until the 1960s.
history
A total of 97 copies were made, the three designs of which differed only slightly. By 1937 50 machines had been equipped with Bissel axles (the axle order changed from 1B to 1'B). The special design feature of this locomotive was the extraordinarily large distance between the driving and running axles of 4000 mm; the last six copies 4050 mm. This resulted in an economical, but economically sensible lightweight construction of the machine, which proved to be outstanding. According to the German State Railroad's booklet for steam locomotives from 1924, the Pt 2/3 was able to handle a train load of 375 t at 65 km / h on the plain and a train load of 265 t at 15 km / h on a gradient of 14 per thousand become.
The idea of the Pt 2/3 was based on the concept of “light trains”, whereby the conductor was saved at the expense of the stoker, who then entered the train through a door at the rear of the locomotive, where he had to take over all the conductors' tasks . The Pt 2/3, later class 70, was replaced by more powerful locomotives such as the BR 64 and electrification from its original service and ended up in the branch line service, where it lasted a long time, especially due to its economy. The obsolete doors at the back were partially expanded in favor of a larger coal box.
The Deutsche Bundesbahn took over 89 locomotives; four had remained in Austria, three apparently no longer economically processed due to the effects of the war, and one had been retired in 1935. The last locomotive, 70 083, was taken out of service by the Nuremberg Federal Railway Directorate in 1963 and transferred to Munich . After spending almost forty years as a technical monument in Mühldorf am Inn , the Bayerische Localbahnverein e. V. put the locomotive back into operation in 2005. After installing the PZB 90 train protection system and GSM-R train radio , it will be used for steam train journeys throughout Bavaria and in neighboring Austria.
After the Second World War, the 70 086, 092, 095 and 096 remained in Austria, which formed the ÖBB series 770 while retaining the serial number . Its main area of application was the Pöchlarn - Kienberg-Gaming route . The 770.86 was shut down on January 31, 1967 as the last of its kind. The locomotive that was then set up at Pöchlarn station was refurbished in 1997 and ran special trains from the Brenner & Brenner Steam Locomotives operating company from 1999 onwards. Today it is in the Ampflwang Railway Museum .
literature
- Andreas Knipping: The class 70 - the Bavarian tank locomotive for light trains and its sister in Baden. EK-Verlag, Freiburg 1998, ISBN 3-88255-170-4
Individual evidence
- ^ Andreas Knipping: The class 70. The Bavarian tank locomotive for light trains and its sister in Baden . EK-Verlag, Freiburg 1998, ISBN 388255-170-4 , p. 43
- ↑ locomotive 70 083. Bavarian Localbahn Society, accessed on September 9, 2012 .
- ↑ ÖBB 770.86 (ex k.Bay.St.B Pt 2/3 6086). In: Austrian Steam Base. Dieter Zoubek, accessed on September 9, 2012 : " November 9, 2010: Now in Ampflwang"
Web links
- Panorama of the 70083 driver's cab
- 70 047 1958 at the Joachim Schmidt Railway Foundation
- 70 079 1961 at the Joachim Schmidt Railway Foundation
