The Konstal 105Na are a class of Polish trams manufactured from 1979 to 1992 in workshops Konstal Chorzow, Poland. The narrow-gauge

Narrow gauge

A narrow gauge railway is a railway that has a track gauge narrower than the of standard gauge railways. Most existing narrow gauge railways have gauges of between and .- Overview :...

 version is designed as 805Na. Currently, they are the most common operating trams in Poland.

Construction

105Na is one-way motor coach, equipped with four doors.

It represents the development of the earlier tram Konstal 105N

Konstal 105N

Konstal 105N is a family of electric trams designed by Konstal, a Polish company based in Chorzów, produced between 1973 and 2001.-Konstal 105N:105N is a single module, unidirectional engine car with four doors on the right side....

, the main changes being the location of the components of the electrical equipment

Electrical equipment

Electrical equipment includes any machine powered by electricity. They usually consists of an enclosure, a variety of electrical components, and often a power switch...

 which were transferred from under the stairs to the back wall of the driver's cabin, the introduction of a separe cabin for the driver and removing the small windows under the front and side windscreens. In terms of utilization, the most important change was the introduction of switching engines. During the start-up 4 motors are connected in series, while during normal working range 2 motors were connected in parallel.
(which reduced the current consumption by 12%). The link between wagons was also changed.

During their exploitation time the 105Na vehicles became the subject of various modifications and upgrades (including changes in the electrical system, new front plastic, change of the door opening mechanism, and even re-tram in Poznań

Poznan

Poznań is a city on the Warta river in west-central Poland, with a population of 556,022 in June 2009. It is among the oldest cities in Poland, and was one of the most important centres in the early Polish state, whose first rulers were buried at Poznań's cathedral. It is sometimes claimed to be...

 to the two-way Konstal 105NaDK). Also the older 105N wagons were modernized to the 105Na standard.

Other variants

The trams Konstal 105Na and 805Na were a base for the production of a large number of variants:

• 106N - thyristor based, 7 units built in 1977-1987, later converted to standard 105Na
• 105NT - thyristor based, 13 units built in 1985-1989, later converted to standard 105Na
• 805NS - meter-gauge with new accelerator, 12 units built in 1984-1990
• 105Nb - new doors and bogies, 15 units built in 1988-1993
• 805Nb - meter-gauge version of the 105Nb
• 111N - bi-directional, 6 units built in 1993
• 106Na - thyristor based, 8 units built in 1991-1993
• 105Ne - slightly thicker walls, 18 units built in 1993
• 105Nb/e - slightly modified electrical system, 6 units built in 1994
• 105Nf - modernized brakes and drivers console, 44 units built in 1994-1996
• 105Ng - three doors, static converter and modified breaks, 2 units built in 1993 additional units obtained by modernizing 105Na
• 105Np - static converter, single unit built in 1994
• 105Nm - similar to 105Nf but with a static converter, 14 units built in 1996-1997
• 105Nz - thyristor based and asynchronous motor, 2 units built in 1997
• 105N1k - similar to 105Ng but thyristor based, 3 units built in 1995
• 105N1k2 - similar to 105N1k but with electrical systems from a different supplier, 60 units built in 1995-2000
• 105N2k2000 - similar to 105N1k2 with a plastic front and rear, 36 units built in 2001

Production numbers

The number of standard-gauge version 105Na vehicles produced is 1443 while the number narrow-gauge version, the 805Na, is 691.

Operators

These trams are used in all Polish cities which operate a tram system and they are the largest group in the stock.

Operator	Number
MZK Bydgoszcz Tramways in Bydgoszcz Tramways in Bydgoszcz exist since 1888. Currently they are operated by Miejskie Zakłady Komunikacyjne Sp. z o.o. w Bydgoszczy. There are 9 lines with a total length of 63,5 km. The tram system in Bydgoszcz uses the 1000 mm narrow gauge...	117
MPK Częstochowa Tramways in Częstochowa Tramways in Częstochowa is the youngest tram system in Poland, formed in 1959. The lines have a total length of 10.2 km and has 20 stops, a shed and 4 loops. Communication leads Miejskie Przedsiębiorstwo Komunikacyjne w Częstochowie Sp...	48
ZKM Elbląg Tramways in Elbląg Tramways in Elbląg - The history of the trams in Elbląg goes all the way back to 1895. Currently the trams are operated by Tramwaje Elbląskie Sp. z o.o.. TE currently has 5 lines with a total length of 32 km, and 74 vehicles...	21
ZKM Gdańsk Tramways in Gdańsk Tramways in Gdańsk have existed since 1873. They are operated by Zakład Komunikacji Miejskiej sp. z o.o w Gdańsku. There are 11 lines with a total length of 116,7 km...	115
MZK Gorzów Wielkopolski Tramways in Gorzów Wielkopolski Tramways in Gorzów Wielkopolski have existed since 1899. They are operated by MZK Gorzów Wielkopolski. Currently, Gorzów Wielkopolski has 5 tram lines, consisting of 38 trams...	18
Tramwaje Śląskie Silesian Interurbans Silesian Interurbans - one of the largest tram systems in the world has been in existence since 1894. The system is spread over more than 50 kilometres and covers thirteen towns in the Upper Silesia metropolitan area and their suburbs Silesian Interurbans - one of the largest tram (streetcar)...	299
MZK Grudziądz Tramways in Grudziądz Tramways in Grudziądz exist since 1896. Currently they are operated by MZK Grudziądz. There are 2 lines with a total length of 18.6 km. Grudziądz is the smallest city in Poland to have a tram line.-Network:-Cars:...	20
MPK Kraków Tramways in Kraków Tramways in Kraków are a tramway system in Kraków, Poland. It is operated since 1882. There are 25 ordinary and 2 supporting lines with a total length of . The total system length for the end of 2008 was , including a tram tunnel with two underground stops....	181
MPK Łódź	439
MPK Poznań Tramways in Poznan The tramways pf Poznań are a tram system operated by Miejskie Przedsiębiorstwo Komunikacyjne w Poznaniu Sp. z o.o. . It currently has 20 daytime lines, one night line, and one tourist line served by historical vehicles. The tram system consists of about 66 km of standard gauge track...	252
Tramwaje Szczecińskie Tramways in Szczecin Szczecin Tramway is an long, eleven-line, standard gauge tramway located in Szczecin, Poland. There are two depots and twelve balloon loops...	173
MZK Toruń Tramways in Toruń Tramways in Toruń exist since 1891. Currently they are operated by Miejski Zakład Komunikacji w Toruniu. There are 5 lines with a total length of 41,4 km. The tram system in Toruń uses the 1000 mm narrow gauge...	55
Tramwaje Warszawskie	561
MPK Wrocław Tramways in Wrocław The tramways in Wrocław form one of the oldest tram systems in Poland. The tram system is operated by MPK Wrocław . The system consists of 23 lines with a total length of lines of . There are six depots and 20 loops...	350