DR 97 401
| T 28 DR 97 401 DR 93 6576 |
|
|---|---|
 |
|
| Numbering: | Erfurt 9101 DR 97 401 ELE No. 17 II BStB No. 59 DR 93 6576 |
| Number: | 1 |
| Manufacturer: | Borsig |
| Year of construction (s): | 1920 |
| Retirement: | 1955 |
| Type : | 1'D1 'h2 (4v) zt |
| Genre : | Z 46.16 |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 12700 mm |
| Height: | 4280 mm |
| Fixed wheelbase: | 3670 mm |
| Total wheelbase: | 9370 mm |
| Smallest bef. Radius: | 140 m |
| Empty mass: | 80.6 t |
| Service mass: | 94.3 t |
| Friction mass: | 66.4 t |
| Wheel set mass : | 16.6 t |
| Top speed: | 55/20 km / h |
| Indexed performance : | 719 kW |
| Coupling wheel diameter: | 1100 mm |
| Impeller diameter front: | 800 mm |
| Rear wheel diameter: | 800 mm |
| Gear system : | Dept |
| Number of drive gears: | 2 |
| Size gears: | 1070 mm |
| Control type : | Heusinger |
| Number of cylinders: | 4th |
| Cylinder diameter: | 520 mm |
| Piston stroke: | 500 mm |
| Cylinder d. Gear drive: | 520 mm |
| Piston stroke gear drive: | 500 mm |
| Boiler : | Belpaire |
| Boiler overpressure: | 14 bar |
| Number of heating pipes: | 138 |
| Number of smoke tubes: | 24 |
| Heating pipe length: | 4000 mm |
| Grate area: | 2.86 m² |
| Radiant heating surface: | 10.7 m² |
| Tubular heating surface: | 109.0 m² |
| Superheater area : | 39.80 m² |
| Evaporation heating surface: | 119.70 m² |
| Water supply: | 7 m³ |
| Fuel supply: | 3 tons of coal |
| Brake: | Compressed air brake type Knorr, Riggenbach counter pressure brake |
| Train heating: | steam |
The 97 401 was a rack and pinion locomotive whose rack and pinion drive was designed for the use of rails with rack and pinion system Abt . It was delivered to the Deutsche Reichsbahn in 1920 with the Prussian class designation T 28 . In 1925 it was classified as 97 401 in their numbering plan . After a stopover at the Eutin-Lübeck Railway Company (ELE), the locomotive came to the Deutsche Reichsbahn and was given the road number 93 6576 .
history
The Prussian State Railways were no longer satisfied with the performance of the previously used T 26 locomotives . The traffic requirements had also increased from the end of the 1910s. In addition to a higher tractive effort, a speed acceptable for passenger traffic was also required. August Meister developed a new rack-and-pinion locomotive as early as 1914 , but the order that had already been placed with Borsig was withdrawn in autumn 1914 after the outbreak of the First World War .
The prototype from Borsig with the serial number 10781 was delivered in January 1922 as Erfurt 9101 . From spring 1922 test drives were made on the Ilmenau – Schleusingen , Boppard – Kastellaun and Rübelandbahn lines . It was found that the class 95 locomotives of the Halberstadt-Blankenburg Railway as well as the class 95 achieved or even surpassed the performance of the rack-and-pinion locomotive in pure adhesion operation .
The T 28 was then used in normal operations on the Linz – Seifen route in the Westerwald. Since the operation of the line could also be ensured by locomotives of the class T 16.1 (class 94.5-17), the locomotive was sold to the Eutin-Lübeck Railway Company (ELE) in 1929 . There the cogwheel drive was removed and the locomotive was given track number 17 with a second crew. The locomotive came to the Brandenburgische Städtebahn (BStB) in 1938 as number 59 (from 1940: 1-203) via the Berlin scrap dealer Erich . The locomotive was used in heavy freight train operations. Compared to the new locomotives with the numbers 51 to 53 , it was inferior to them in terms of performance and coal consumption. When the Brandenburg City Railway was taken over by the Deutsche Reichsbahn, the locomotive was given the road number 93 6576. In 1955, the uneconomical locomotive was decommissioned and scrapped.
Constructive features
The locomotive had an 80 mm thick bar frame. The riveted long shell consisted of two shots. The basin was relatively high at 3000 mm. The standing boiler with a 1.43 m wide grate surface was designed in the Belpaire type. The steam dome was on the first boiler shot. The sandpit was on the second boiler shot.
The coupled wheel sets were supported by springs under the axle box and the running wheels above the axle box on the frame. The first and third axles were firmly mounted in the frame. The fourth axis had a lateral displacement of 16 mm. Since the wheels for gear operation were arranged between the coupling wheels, the wheelbases were designed differently. The front and rear wheel axles were designed as Bissel axles with a lateral displacement of 100 mm.
The engine was designed as a four-cylinder compound superheated steam engine based on the Winterthur system . The cylinders were arranged horizontally on the outside. The hot steam and wet steam cylinders were each arranged in a cast block on each side. The superheated steam cylinders below worked on the second coupling axis and could be operated as twin machines in pure friction mode. The overhead wet steam engine worked on the gear drive via coupling rods and crank disks. The gears were located between the first and second as well as the second and third coupling gear sets.
The Heusinger control was external. The two engines were reversed together. The locomotive had a single-chamber compressed air brake of the Knorr type with an additional brake. The brake acted on the second and third coupled axles. A Riggenbach counter-pressure brake was also available for operation on steep sections . For this purpose, the machine had a hand-operated grooved belt brake for the gear drive and a throw lever handbrake.
The water supply was stored in two water boxes on the side and behind the driver's cab. The coal box was also behind the cab.
literature
- Manfred Weisbrod, Hans Müller, Wolfgang Petznick: German Locomotive Archive: Steam Locomotives 3 (Series 61 - 98) . transpress, Berlin 1994, ISBN 3-344-70841-4 .
- 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 .
- 1D1 four-cylinder composite superheated steam cogwheel tender locomotive, type T28 of the Deutsche Reichsbahn In: Die Lokomotive , 1926, pp. 144–145 ( ANNO - AustriaN Newspapers Online )