From the history of the tram car. The fact that on the tram lines of the country “standard” rolling stock occupied by the end of 1930-ies a dominant position, does not mean that he was free of flaws even for its time. First and foremost, experts have noted excessively large (14.5 tons) mass of motor cars of type “X”, which, being generally crowded with passengers, caused increased consumption of electricity. This dramatically inferior in dynamic characteristics surrounding them more intense flow of road transport, loud and unpleasant noise when driving, and quickly destroyed the railway track already laid in most of cities, buildings, that is, on the live thread. The elimination of the second control stations and door openings of the left side eased “Kharkiv” rather little, as it simultaneously had to introduce pneumatic actuator doors, the driver’s cabin and other improvements dictated by concern for safety.
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