What does the notation ‘N+4’ or ‘M+3’, etc., mean in describing sleeper densities?

18-07-2019

This notation is an old one. The 'N' or 'M' in this stands for the length of a rail in yards. The additional number specified represents the excess of the number of sleepers over the number of yards for a rail. E.g., 'N+3' for 11-yard (33') rails indicates 14 sleepers (11 + 3) for each rail. This was a convenient formulation, especially when rails were manufactured to sizes of 11, 12, or 14 yards. Before the days of mechanized track laying, it was common to see track laid where the sleeper density was not uniform, with some bunching up of sleepers towards the end of each rail, with adjacent sleepers at the ends of neighbouring rails being less than a foot apart in some cases. Source -

Read More
What are ‘slip coaches’ and ‘through coaches’?
June 27, 2019

In India slip coach refers to a coach that is designated to terminate its journey at a station prior to the final destination of the rest of the train. The more accurate term is sectional carriage. The coach or coaches are left behind after being detached from the rest of the train. In India this is done only after the train comes to a halt; the

Read More
Are steam locos being manufactured in India? When were the last steam locos built in India?
June 27, 2019

No. The last BG steam loco built by CLW was a BG ‘WG’ class loco named Antim Sitara ("The last star"), #10560, built in June 1970. Mysteriously, this loco's final disposition is not known; SER records it as "untraceable". One of the two WG locos preserved at CLW bears a name board 'Antim Sitara', but the loco is not #10560! The last WP was

Read More
How do I subscribe to the ‘Indian Railways’ magazine? What does the ‘Indian Railways’ magazine contain?
June 27, 2019

The 'Indian Railways' magazine is the primary periodical published by IR covering its activities and events. Although it is intended mainly for railway staff, it is available to all for purchase or subscription. Articles in the magazine usually cover news items about new trains, construction, etc., as well as activities (whether of a railway

Read More
Where can I find train-related games? Loco simulators? Etc.?
June 27, 2019

Roni Kappel's IR-specific downloads for MSTS are available on this site! The MSTS World of Indian Railways has IR-specific MSTS downloads. Microsoft sells the Microsoft Train Simulator (MSTS) developed in conjunction with Kuju Entertainment of the UK. Auran has a train simulator, Trainz, which includes simulations of train driving, railway

Read More
Family History
June 25, 2019

The higher up the ranks your ancestor got, the easier it ought to be to find out about him. He would probably have had to join his relevant professional institution, and this will give you at the least dates of admission, promotion within the institution, possibly an article written by him, and an obituary. When searching for obituaries bear in

Read More
What was the Guarantee System? What were Guaranteed Railways?
June 25, 2019

In the 1840s, when the first proposals for railways in India were being debated in Great Britain, there was intense lobbying in support of these proposals by banks, traders, shipping companies, and others who had a strong interest in seeing railways be formed in India. These supporters prevailed upon the British Parliament to create the Guarantee

Read More

Latest News

General Manager’s Safety Award for 10 Staff of Central Railway