Rhaetian Railway G 2/2 2/3
The G 2/2 2 / 3 is a tender locomotive of the Mallet type, the 1896 procured the Rhaetian Railway in two copies. The locomotives were built by the Swiss Locomotive and Machine Works in Winterthur, as selling price is 65 500 - Swiss Franc specified.
The two locomotives were distinguished by the additional run- axis of the two delivered 1891 G 2x2 / 2 When re-ordering of the other eight Mallet locomotives in 1903 we turned the chassis so that the design of type G 2 /3 2 / 2 corresponded. In this design, the first two locomotives were converted without barrel.
Technical
The comparison with the two previous locomotives new arrangement of one of the axes run under the cab had its basis primarily in the increase of operating supplies. Because the boiler and engine dimensions remained largely the same, only the boiler pressure was increased from 12 to 14 atm. In this connection, the high-pressure cylinder diameter reduced. Even the rather large rear overhang wanted to reduce. However, it quickly became apparent that the additional increase in the smoothness did not materialize, but the high wheel flange and Gleisabnützung remained. This was the reason why the successor locomotives were built with leading barrel.
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 depended on forward and was thus supported at the level of the pivot points 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 designed in the form of a radial Adams'schen frame. 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 traction works 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.
Operating
The performance issue with the order demanded that the locomotives can carry a train of 70 tons on a slope of 45 per thousand at 15 km / hr. This requirement could be provided with a power of 500 hp.
The two locomotives were scrapped in 1926 when the RhB and came to power plants Oberhasli ( predecessor company of Meiringen- Innertkirchen -Bahn ) which they ( No. 23 ) and 1937 (No. 24) used the same numbers to 1940. At the latest during the Second World War, the locomotives were recycled as scrap metal.