Rhaetian Railway G 2/3 2/2
The G 2 /3 2 / 2 a tank locomotive of the Mallet type, which in 1902 purchased the Rhaetian Railway (RhB) in eight copies. The locomotives were built by the Swiss Locomotive and Machine Works in Winterthur. As a selling price 76,800 Swiss francs is given.
They are the successor series of the G 2/ 2 2 / 3, where the barrel axis was now formed as the leading run- axis. Here, the locomotive No. 31 differed in some respects from the other locomotives.
Technical
The locomotives possessed an outer frame, the locomotive frame of the rear part was pulled forward and rested in the center of the bogie from. The boiler hung on the front case and is thus supported at the height of the pivot point for the last time. A pivot pin did not have the locomotives, because the ball joint of the steam supply was positioned at this location. The bogie was pivotally connected to pivot bearings with the main frame. In this connection, two buffer springs were installed, which were offset by a swaying of the bogie together with the centering of the moving sliding plates of the bearings. The barrel axis was formed in the form of a radial Adams'schen frame, and thus was in addition movable to the engine in the bogie.
The rear cylinder were the high-pressure cylinder, which moved into its vapor directly from the centrally located steam dome. The front cylinders were fed with the exhaust steam from the high pressure cylinder. The steam supply was carried out by solid tubes, the ball joint was positioned at the pivot point. The exhaust steam was passed over a movable exhaust pipe with packing glands for blowpipe. To start the low-pressure cylinder could be supplied with throttled steam. The control of the design Walschaerts was the same direction in both engines. The locomotives owned flying scenes in bag design. The control of the two engines was carried out with two internal rod coupled and balanced overhead camshafts. The reversal took place with screw and wheel When fully inserted control so automatically the restricted supply of live steam to the low pressure cylinder.
The locomotives No. 26-28 were fitted on the sale to the Chemin de fer Yverdon -Ste- Croix ( YStC ) nor of the RhB workshop Landquart, in 1920/21 with a superheater Schmidt-type.
Whereabouts
All locomotives were sold to the electrification of the RhB 1920-1921. The numbers 25, 29-32 were sold to Madagascar, where they were decommissioned and scrapped in 1951. The 26-28 came first to YStC and then to Spain for Union Espanola de Explosivos. These machines were scrapped and scrapped between 1946 and 1964.