| Posted by FSWood on October 19, 2021 | |
That very low extension of the aft pantograph where it is contacting the wire brings to mind something read decades ago about either or both the Pennsylvania's or the Milwaukee Road's catenary standards; which was that changes in contact wire height should be made with a 1% grade in the wire as it transitions between heights. Assuming something similar applies here it means it will take a certain distance after exiting that tunnel before you see the pantograph working with notably more extension. Hmm, I wonder if that slow of a change in contact wire height was necessary with pole trolleys using wheels since that kind of current collector has rather less mass than a pantograph and also worked with less current.
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| Posted by FSWood on October 19, 2021 | |
And then the other thing I wonder is whether those tree stumps at upper left were created by logging or by avalanche.
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On the Rhaetian Railway, the contact wire is very often laid low because of the narrow tunnel profiles, and the pantograph is only very slightly raised. Here the train is running between two tunnels.
The trees in the background have been logged, there are no avalanches here, because above the track is dense forest.
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