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What about other articulated locomotives?

20-06-2019

What about other articulated locomotives? Other than the Garratts mentioned above a few articulated locos were used in India. Perhaps the best known are the WCG-1 (EF/1) 1.5kV DC locos ('Crocodile') and the NDM-1 dual-engined diesel loco for the Neral-Matheran hill run. The bonnets of both these types of locos were able to swivel around. Other articulated locomotives used in the past: NWR's MAS class #460 Mallet (broad gauge) WIPR's IM class Mallets (meter gauge) ISR's double Fairlies, 4 of which went to the Nilgiri under the NMR (meter gauge) (Hughes, part 2, p.70) NWR's KST TS class #180, #181, Kitson-Myers Source - IFRCA.org INFORMATION CENTER -

Q. WHAT ARE SINGLE LINE BLOCK, TWIN SINGLE LINE BLOCK, ETC.?

July 16, 2019

A single line block system has just one track, which may be used for traffic in both directions. Signals are provided for both directions, and the token exchange or other system of interlocking works for traffic going either way. The basic principle is to restrict access to a block of track to a single train at a time, whether going in the up or

What is the bell code used to communicate between signal cabins for block working?

July 16, 2019

IR's bell code has some points of correspondence with systems used in the UK in the early part of the 20th century. The system of bell codes to convey messages from one signalbox to another is given below. An 'X' indicates a short strike on the bell, and a dash indicates a pause. Bell Codes Message Code Attention X Line Clear

What happens if lots of trains go in one direction in a section that uses physical tokens, and one station then runs out of tokens?

July 16, 2019

As may be deduced from the description of token block systems above, there is a problem if the traffic is not symmetric in both directions between the two stations at the ends of a block section. Eventually, one of the stations will run out of tokens to dispense to trains. This condition is known, not surprisingly, as a token exhausted condition,

How is the Neale’s ball token system or other physical token system worked?

July 16, 2019

This system is primarily used for single line routes (although it is seen on others too, e.g. MS-KMU-TPJ). The ball token system relies on the crew's physical acquisition and carriage of a small metal ball to mark a train's permission to enter a section of track. The ball is dispensed by a Token Instrument at either end of the block. The two

How do the block or token instruments work?

July 16, 2019

In manual block working of double lines, the block instruments that connect the two signalboxes (and which dispense the tokens in the case of token systems) have to be coordinated by the signal operators at the two signalboxes. The signalbox that accepts a train into its block section must first set the Line Clear indication on the block

What kinds of block instruments are or were used in India?

July 16, 2019

In India, the most prevalent form of physical token system to be found in recent decades is the Neale's Ball Token System and variants such as Neale's Voucher Block, Neale's Tablet Token, etc. Other systems such as Theobald Key Token, Webb and Thompson electric token staff, Tyer & Co.'s key token instrument (one-wire three-position instrument

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What about other articulated locomotives?

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