Why do locos sometimes use the rear pantograph and sometimes the front pantograph?

22-06-2019

There is in principle no difference between using the front and the rear pantographs for most locos as each is fully capable of delivering the required electric current from the catenary to the loco. (The AC-DC locos are special in that each loco is intended for a different traction supply.) Generally on IR there is no need for both pantographs to be raised at once since there are usually no unusual situations such as frost on the catenary or increased current collection requirements seen with other countries' railways. Yet, it is often seen that there are some definite patterns in pantograph usage. It has been the practice in many areas for locos to always have their rear pantographs up.

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What is an ‘A’ class line, or a ‘Q’ class line, etc.?
June 28, 2019

The permanent way sections are classified by IR according to the maximum speed (or more precisely, the maximum speed proposed for the immediate future) that the tracks are capable of supporting. In most cases this classification is more an indication of the priority of the route and IR's plans for it in the future, rather than an indication of the

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What gauges are used in India?
June 27, 2019

Broad Gauge - 5'6" (1676mm) This is now found all over the country, and all major passenger and freight routes are now broad gauge. This is the widest gauge in regular use anywhere in the world. (In the past, though, an 8' gauge was used in Oregon, USA, and a 7'¼" gauge was used for the Great Western Railway in the UK.) Outside India, the 5'6"

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Appendix: Steam loco wheel arrangements
June 25, 2019

As I expect most people who read this document will not be railway enthusiasts and would be researching a period when the steam locomotive reigned supreme, I thought that some very brief notes on steam locomotive wheel arrangement should be included. ये भी पढ़े - योगासन का इतिहास तथा योग से

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Books
June 25, 2019

The Indian Railways FAQ section on books on Indian Railway history shows what has been available. For general overviews of history, see the books by Westwood, Kerr, and Sahni. The books by Bhandari have concise summaries of the histories of several railway systems. The 3-volume set, Railway Construction in India, has a lot of historical detail on

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Wheel and Axle Plant (now Rail Wheel Factory)
June 25, 2019

WAP was set up in 1984 at Yelahanka, in Bangalore, for the manufacture of wheels and axles, since other local manufacturers such as the Durgapur Steel Plant were unable to satisfy IR's needs, and imports were costly. WAP uses some advanced techniques such as pressure-moulding of wheels. A lot of WAP's products are made from scrap metal generated

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Parel Workshops, CR
June 22, 2019

Parel Workshops of CR have been manufacturing diesel shunters (WDS-6 class, mostly) using components produced by DCW and DLW, since 2006. The workshops are also a leading establishment for repairs and overhauls of locomotives. Established in 1879, they were engaged in steam locomotive repair and overhaul and since 1972 (after the decline of BG

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Raipid Rail क्या है? कैसे बदलेगा शहरों का भविष्य | Delhi-Meerut RRTS पूरी जानकारी

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