RhB G 2/3 + 2/2

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G 2/3 + 2/2
25G2322RhBi.jpg
Numbering: 25-32
Number: 8th
Manufacturer: SLM
Year of construction (s): 1896
Retirement: 1920/21 (sale)
Axis formula : (1'B) B.
Genre : Mallet
Gauge : 1000 mm ( meter gauge )
Length over buffers: 10626 mm
Bogie axle base: 1600 mm
Fixed wheelbase: 1600 mm
Total wheelbase: 7100 mm
Empty mass: 39.7 t
Service mass: 47.3 t
(superheater 48.4 t)
Friction mass: 42.8 t
(superheater 43.9 t)
Wheel set mass : 10.69 t
(superheater 10.75 t)
Driving wheel diameter: 1050 mm
HD cylinder diameter: 330 mm
LP cylinder diameter: 490 mm
Piston stroke: 550 mm
Boiler overpressure: 14 atm.
Number of heating pipes: 139 (superheater 56/15)
Heating pipe length: 3600 mm
Grate area: 1.3 m²
Radiant heating surface: 7 m²
Superheater area : (20 m²)
Evaporation heating surface: 79 m²
(with superheater 76.9 m²)
Water supply: 3.4 m³
Fuel supply: 1 t (coal)
Control: Walschaert

The G 2/3 + 2/2 is a mallet-type steam tender locomotive that the Rhaetian Railway (RhB) purchased eight copies in 1902. The locomotives were manufactured by the Swiss Locomotive and Machine Factory in Winterthur . The retail price is given as 76,800 Swiss francs.

They are the successor series of the G 2/2 + 2/3 , whereby the running axle was now designed as the leading running axle. The locomotive No. 31 differed from the other locomotives in several ways.

Technical

The locomotives had an outer frame, the locomotive frame of the rear part was pulled forward and supported the bogie in the middle. The kettle hung forward and was therefore supported for the last time at the height of the pivot point. The locomotives did not have a pivot, as the ball joint for the steam supply was located at this point. The bogie was rotatably connected to the main frame with journal bearings. In this connection, two buffer springs were installed which, together with the centering springs of the movable sliding plates of the supports, counteracted the rolling of the bogie. The running axle was designed in the form of an Adams radial frame and was therefore movable in addition to the engine in the bogie.

The rear cylinders were the high pressure cylinders that obtained their steam directly from the centrally located steam dome. The front cylinders were fed with the exhaust steam from the high-pressure cylinders. The steam was supplied via fixed pipes, the ball joint of which was arranged in the pivot point. The exhaust steam was led to the blowpipe via a movable exhaust pipe with stuffing boxes. To start up, the low-pressure cylinders could be supplied with throttled live steam. The control of the Walschaerts type was in the same direction for both engines. The locomotives had flying backdrops in pocket design. The control of the two engines was carried out with two overhead control shafts coupled and balanced with an inner rod. The change of direction took place with screw and wheel. With the fully configured control, the throttled supply of live steam to the low-pressure cylinder took place automatically.

When sold to Chemin de fer Yverdon-Ste-Croix (YStC), locomotives No. 26–28 were still equipped with a Schmidt superheater by the RhB Werkstätte Landquart in 1920/21 .

List of G 2/3 + 2/2 of the RhB

operation
number		 Installation Factory
number		 Ausran-
Government		 Whereabouts
25th 11/25/1902 1480 1921 Sold to Madagascar, scrapped in 1930
26th 12/10/1902 1481 1920 Sold to YStC, 1947 sold to Spain, scrapped in 1969
27 12/10/1902 1482 1920 Sold to YStC, scrapped in 1946
28 December 20, 1902 1483 1920 Sold to YStC, 1947 sold to Spain, scrapped in 1960
29 12/29/1902 1484 1921 Sold to Madagascar, scrapped around 1958
30th 05/01/1903 1485 1921 Sold to Madagascar, scrapped around 1958
31 1/15/1903 1486 1921 Sold to Madagascar, scrapped around 1958
32 1/15/1903 1487 1921 Sold to Madagascar, scrapped around 1958

literature

  • Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition. Birkhäuser, Stuttgart 1967, ISBN 3-7643-0742-0 , p. 341 ff . (ISBN of the 6th edition).
  • Claude Jeanmaire: The steam locomotives of the Rhaetian Railway - From the Landquart-Davos Railway to the Rhaetian Railway . Verlag Eisenbahn, Villingen 1974, ISBN 3-85649-022-1 .
  • Gian Brüngger: Steam on the RhB (=  LOKI-Spezial . No. 40 ). Stämpfli Verlag AG, Bern 2016, ISBN 978-3-7272-1787-6 .
  • Wolfgang Finke, Hans Schweers: The vehicles of the Rhaetian Railway: Locomotives, railcars, tractors . In: Wolfgang Finke (Ed.): The vehicles of the Rhaetian Railway, 1889–1996 . tape 3 . Schweers + Wall, Aachen 1998, ISBN 3-89494-105-7 (223 pages, [ limited preview in the Google book search]).