History of Development
The first decade after Second World War was a period of huge expansion of trolleybus systems in the Soviet Union. They were considered as an innovative decision in comparison with "semi-obsolete" and expensive trams. The mainstay for trolley fleet for that time was extremely simple, reliable and durable MTB-82 vehicle. But it was medium-sized and uncomfortable for both driver and passengers. After small series and experimental TBU-1 vehicles ZiU developed completely new model for mass production with all disadvantages of MTB-82 eliminated. This was first variant of ZiU-5. More than 200 vehicles were produced for wide testing on Moscow streets in 1959. This huge testing work discovered the weaknesses of new design. Trolley depots in collaboration with ZiU and "Dynamo" electric motors factory fixed the problems in their repair facilities. Using this experience ZiU engineers corrected the ZiU-5 design, in 1960 new updated mass production series was launched. During mass production some technological adjustments were made, see Variants section. In 1971 ZiU introduced completely new trolleybus design, the ZiU-9. It was more cheap due to technology improvements and refusal from aluminium hull and was able to carry more passengers than ZiU-5. So mass production of ZiU-5 ceased in 1972.
Read more about this topic: Zi U-5
Famous quotes containing the words history of, history and/or development:
“The history of men’s opposition to women’s emancipation is more interesting perhaps than the story of that emancipation itself.”
—Virginia Woolf (1882–1941)
“The basic idea which runs right through modern history and modern liberalism is that the public has got to be marginalized. The general public are viewed as no more than ignorant and meddlesome outsiders, a bewildered herd.”
—Noam Chomsky (b. 1928)
“Ultimately, it is the receiving of the child and hearing what he or she has to say that develops the child’s mind and personhood.... Parents who enter into a dialogue with their children, who draw out and respect their opinions, are more likely to have children whose intellectual and ethical development proceeds rapidly and surely.”
—Mary Field Belenky (20th century)