Табличка «Над уровнем моря 66,3 сажени»

[leonovvaleri.livejournal.com]

Оригинал взят у leonovvaleri в Табличка «Над уровнем моря 66,3 сажени»

Станция «Канатчиково» Московской Окружной железной дороги.

Табличка «Над уровнем моря 66,3 сажени», - вне всякого сомнения, - представляет определенный краеведческий интерес, - но, - для каких именно целей она здесь была установлена? Конструкция таблички вообще не похожа ни на марку, ни на репер.

Comments

[aikarpov.livejournal.com]

Так, вдогонку к Чехии - ещё в Индии практически на всех станциях высота отмечена.
Английский термин - MSL, Mean sea level.

Из информации на данную тему нашел только такое:

In case of railway stations, Mentioning of Mean sea level is important because

With reference to the mean sea level the loco pilot knows how must extra torque to be provided for the loco to move from one location to another. For example, when a train is intended to go from a location whose MSL +250m to another location whose MSL is +280m, the locopilot can know how much extra effort must be put by the engine to reach the elevation difference of +30m this is the extra effort put by the engine in addition to normal tractive effort to overcome friction of rails. Similarly when a train moves from high MSL to lower MSL area, the less is the tractive effort put by the engine and higher is the regeneration capacity of the train travelling in inclined slope rails.
The concept of MSL is used by civil engineers in railway department for electrification of the line that means to construct poles and elevate them to carry current carrying conductors. So that trains can pass through them drawing the current. This MSL makes a vast difference in this context. For example, if it is planned to wire conductors from one location whose MSL is+250 to another location whose MSL is+280, the poles have to be suitability elevated between these locations so that for a loco engine these differences must not effect their running. Engines uses panto graph to collect power from lines, at both locations whose MSl is lower and higher, the panto graph must touch the lines. for this purpose, the poles have to be laid so that the electrical line is uniform


Правда мне оба варианта не кажутся заслуживающими того, чтобы на станциях таблички вешать. Между станциями вполне могут быть спуски и подъёмы, которые сведут на нет весь смысл в знании того, что между такими-то станциями разница по высоте в 30 метров.
А те, кто столбы ставят, тоже не будут табличкой столетней давности руководствоваться, свои замеры проводить будут.

Ещё вот такой вариант объяснения есть:
“Earlier, most railway stations were centrally located in cities. For construction of other civil engineering structures in the vicinity, the same average as calculated for the railway stations and displayed on the board was used,” says chief public relations officer Ravinder Bhakar of the Western Railway.

He adds that though the detail may not be displayed predominantly in the newer stations, the Railways continue to use it internally. Explaining the other uses of the mean sea level, Bhakar said that the variation of the sea level between two connected stations is an important parameter.

“If one station is at 1000 metres above from sea level and the next is at 2000 metres, the locomotive will have to go uphill and will therefore need an elevated track as well as higher power. Also, other factors such as the turns and curves on the route for the tracks are determined by the height from the sea level,” Bhakar says.

[vkorehovisback.livejournal.com]

поэтому наверное этп средний уровень? он учитывает холмы и неровности дороги?

[vkorehovisback.livejournal.com]

не, наверное раньше станции были близко друг к другу... и особенно много спусков и подьемов между ними не было.

[aikarpov.livejournal.com]

Ну тут вопрос в том, по какой площади этот уровень рассчитывается.