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105N is a single module, unidirectional engine car with four doors on the right side.
The design came about as a result of the modernisation of Konstal's earlier 13N model from the 1960s and 1970s with a lighter body. All the electrical systems from the old model remained, but the new model abandoned the streamlined appearance of its predecessor for a more angular look. The side windows were enlarged, and smaller windows were added on the front and sides, leading to its being nicknamed the aquarium. The first models lacked the ability to be connected to one another, and the placement of the electrical system caused problems with humidity. The tram was equipped with electromagnetic, drum and rail brakes. Its chief engineers were Zygmunt Giziński and Wojciech Kozik.
The basic version, 105N (and later series of 105N/1 with only minor changes), had 980 units.
25 units of a new version for Łódź, the 805N were built in 1978.
The 105N trams were used in all Polish cities with tram systems. During their years of service, most of them were modernized and upgraded to the 105Na variant, so today there are only a few of them remaining. In Gdańsk (1), Poznań (2), and Szczecin (2) there are cabs rebuilt to the earliest version.
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- length 13500 mm
- width 2400 mm
- high 3060 mm
- weight 16800 kg
- seats for 20 persons
- standing 105 persons
- Engines 4, each 41.5 kW