LAG No. 87 and 88
| LAG No. 87 and 88 DR series 98.18 |
|
|---|---|
| Numbering: | DR 98 1801-1802 |
| Number: | 2 |
| Manufacturer: | Krauss Maffei |
| Year of construction (s): | 1937 |
| Retirement: | 1960 |
| Type : | 1'D1 'h2t |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 11,600 mm |
| Smallest bef. Radius: | 100 m |
| Service mass: | 60.8 t |
| Friction mass: | 46.2 t |
| Wheel set mass : | 11.7 t |
| Top speed: | 70 km / h |
| Indexed performance : | 346 kW |
| Starting tractive effort: | ~ 107 kN |
| Driving wheel diameter: | 1,100 mm |
| Impeller diameter front: | 850 mm |
| Rear wheel diameter: | 850 mm |
| Cylinder diameter: | 460 mm |
| Piston stroke: | 508 mm |
| Boiler overpressure: | 14 bar |
| Number of heating pipes: | 43 |
| Number of smoke tubes: | 32 |
| Heating pipe length: | 3800 mm |
| Grate area: | 1.69 m² |
| Radiant heating surface: | 7.44 m² |
| Tubular heating surface: | 58.67 m² |
| Superheater area : | 32.60 m² |
| Evaporation heating surface: | 66.11 m² |
| Water supply: | 6.3 m³ |
| Fuel supply: | 2.7 tons of coal |
| Brake: | Air brake |
The locomotives with track numbers 87 and 88 were superheated steam locomotives from Localbahn AG (LAG). These were the last two machines that the LAG acquired in its history, as the company was nationalized shortly after delivery in 1937. The locomotives largely corresponded in their design to the TAG 7 locomotive , which had been developed by Krauss-Maffei in 1936 for the Schaftlach – Tegernsee AG (TAG) railway line . The TAG 7 (and its two sister machines) are considered to be the last local railroad locomotives that were designed and built in Bavaria. In contrast to the two LAG machines, the TAG 7 has been retained to this day as an operating reserve for the Tegernseebahn and later as a museum locomotive. It is maintained by the Bavarian Local Railway Association and regularly used for museum trips around Munich.
TAG 7 and her sister machine at the end of a development series of the first three-axis local railway machine end of the 19th century on the Bavarian GTL 4/4 (DR-series 98.8-9 and 98.16) and the derived DRG Class 98.10 and 98.11 , the were also referred to as GtL 4/5. The relationship between the types is also clearly visible from the outside. In the old Bavarian spelling, the TAG / LAG machines would have been a GtL 4/6: unlike the GtL 4/5, the original design of the GtL 4/4 was supplemented by two running axles, each in a Krauss-Helmholtz steering frame were ordered. The coupling wheel diameter had been increased from 1006 to 1100 mm. This resulted in very good running properties in both directions, and the top speed could be increased to 70 km / h. The three locomotives were the largest and most powerful local railroad locomotives that were ever used in Germany.
Initially, the two LAG machines were stationed in Füssen . Both locomotives went into the possession of the Deutsche Reichsbahn as class 98.18 and were taken over by the Deutsche Bundesbahn after the Second World War . They were in use until 1960, most recently in Kempten .
literature
- Horst J. Obermayer: Steam locomotives - standard gauge . In: German Railways . Weltbild Verlag, Augsburg 1995, ISBN 3-89350-819-8 , p. 251 .
