Great shot of a great subject, Georg!
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This may seem a stupid question but what does this steam rotary do and how does it work
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Nice snow thrower. Self propelled. the US didn't have that
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To Nigel Cliff: I try to explain with my poor english. The rotary X rot d 9213 was built to clear the track of the Bernina line from snow and avalanches. This line goes from St.Moritz with grades up to 7.0 % over the Bernina pass (2253 m a.s.l.) to Tirano in Italy and was since the opening in 1910 electrified with 1000 DC. Because the electric overhead wire could be damaged by avalanches, the machine was built self-propelled (0-6-0+0-6-0, system Meyer), but normally it was pushed by an electric locomotive oder rail car, so the hole steam of the boiler could be used for driving the front wheel, which was driven by a separate steam machine (behind the opened flaps on the picture).
Today there are modern electric rotarys in use and this oldtimer is living history. It makes several fan trips every year.
Georg
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Many thanks Georg I understand that explanation perfectly
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