AL T 20
| AL T 20 SNCF 242 TA DR 79 001 |
|
|---|---|
| Numbering: | AL 8601-8630 SNCF 601-630 |
| Number: | 30th |
| Manufacturer: | Batignolles-Châtillon, Grafenstaden |
| Year of construction (s): | 1929 + 1930 |
| Retirement: | until 1967 |
| Type : | 2'D2 'h4vt |
| Genre : | Pt 48.17 |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 17,745 mm |
| Total wheelbase: | 14,360 mm |
| Empty mass: | 96.5 t |
| Service mass: | 123.8 t |
| Friction mass: | 68 t |
| Wheel set mass : | 17 t |
| Top speed: | 100 km / h |
| Coupling wheel diameter: | 1660 mm |
| Impeller diameter front: | 1100 mm |
| Rear wheel diameter: | 1100 mm |
| Number of cylinders: | 4th |
| HD cylinder diameter: | 420 mm |
| LP cylinder diameter: | 630 mm |
| Piston stroke: | 650 mm |
| Boiler overpressure: | 16 bar |
| Number of heating pipes: | 150 |
| Number of smoke tubes: | 21st |
| Heating pipe length: | 5000 mm |
| Grate area: | 3.08 m² |
| Radiant heating surface: | 15.7 m² |
| Tubular heating surface: | 138.94 m² |
| Superheater area : | 44.8 m² |
| Evaporation heating surface: | 154.64 m² |
| Water supply: | 12 m³ |
| Fuel supply: | 5 tons of coal |
The class T 20 of the Alsace-Lorraine railways Réseau ferroviaire d'Alsace-Lorraine (AL) was a passenger train tank locomotive . When they were taken over by the SNCF , the locomotives were given the designation 242 TA.
history
procurement
The originally Spanish design of four-cylinder composite steam locomotives with the 2'D2 ' wheel arrangement could be found on French tracks from the mid-1920s.
In 1929 and 1930, AL procured thirty locomotives of this type, which were based on the design of the PLM 242 AT . The first 20 locomotives were delivered by Compagnie de Batignolles-Châtillon in 1929 and were given the numbers 8601 to 8620. In the following year, SACM Grafenstaden delivered ten more locomotives with the numbers 8621 to 8630.
Use in France
The locomotives were used on the lines on the outskirts of Strasbourg and from there to Colmar , St. Dié, Sarrebourg, Lauterbourg, Wissembourg , Kehl and Saargemünd . In addition to Strasbourg, the machines were also located in Metz and Saargemünd.
All locomotives were taken over by the SNCF in 1938, and six were lost in the Second World War.
One machine, the 242 TA 602, remained in the GDR after the end of the Second World War. The remaining locomotives remained on the former AL route network until the last locomotive was retired on November 2, 1967.
242 TA 602 as 79 001 at DR
The locomotive 242 TA 602 was found in Mühlhausen / Thuringia after the end of the war . Then it appears in the Zeitz depot (Rbd Erfurt) and was z-placed on May 1, 1946 in Zeitz's dam park. On November 19, 1951, it was taken over by the FVA Halle . It was given the number 79 001, which had already been assigned twice before. The first locomotive with this number was a Saxon XV HTV , which was retired in 1933. In 1938 this number was given to locomotive no. 44 of the former Braunschweigische Landeseisenbahn, which was taken over by the Reichsbahn . However, this 1'D1 'h2t locomotive was sold in 1947, so the number was free again.
The now 79 001 was published in 1952 in the Raw “7. October “Zwickau worked up. The FVA Halle wanted to use this locomotive as a brake locomotive , for which it seemed well suited because of the compound drive. Therefore, as far as it was possible with reasonable effort, it was equipped with fittings and additional units according to the Reichsbahn design. A Riggenbach counter-pressure brake was also installed for use as a brake locomotive .
However, the locomotive's running characteristics were not satisfactory either in trial operation or in use in front of passenger trains. The main reason for this was the suspension, which was not matched to German superstructure conditions, and the wedge resetting of the bogies. The vehicle was therefore withdrawn from the first general inspection in 1963.
Constructive features
The locomotive had an internal sheet metal frame and a riveted boiler with a Belpaire rear boiler. The fire box was between the frame cheeks. The flue pipe superheater was of the Schmidt type . The steam dome and sandpit were mounted in the middle of the boiler under a common panel. The bogies corresponded to the PLM design.
The four-cylinder compound engine had horizontally arranged high-pressure cylinders on the outside of the frame, the piston rods of which acted on the second drive wheel set. The low-pressure cylinders were slightly inclined on the inside in the frame and acted on the first wheelset shaft designed as a bolster axle. The Heusinger control was outside; the control of the inner cylinders was derived from it. Originally the locomotives had an ACFI preheater.
The coupled wheel sets were supported by leaf springs below the axle box. The spring assemblies were connected with compensating levers. The bogies served as additional support points.
In contrast to the otherwise identical design of the PLM locomotives, the machines of the AL had a driver's cab design adapted to right-hand traffic.
literature
- Weisbrod, Bäzold, Obermayer: The great type book of German steam locomotives . Transpress Verlag ISBN 3-344-70751-5
- Karl-Ernst Maedel: Locomotive number 79 001 - the history of the locomotive in the picture . In: Alfred B. Gottwaldt (ed.): Lok magazine . No. 119 . Franckh'sche Verlagshandlung, W. Keller & Co. , 1983, ISSN 0458-1822 , p. 90-91 .
- Lothar Spielhoff: Steam Locomotives: Railways in Alsace-Lorraine (EFA F.1) . Alba, Düsseldorf 1991, ISBN 3-87094-142-1 .
- Manfred Weisbrod, Hans Müller, Wolfgang Petznick: German Locomotive Archive: Steam Locomotives 3 (Series 61 - 98) . transpress, Berlin 1994, ISBN 3-344-70841-4 .
