2 Railway Employee

Does IR operate diesel-electric or diesel-hydraulic multiple units of any kind?

14-07-2019

There are several diesel-electric multiple units (DEMUs) and diesel-hydraulic multiple units (DHMUs) in operation. Most are made by ICF. The BG DEMUs have a Cummins VTA 1710 V-12 prime mover of 705 HP, whereas the BG DHMUs have two 350hp underfloor engines (Cummins 855R) driving two separate Voith hydraulic transmissions via propeller shafts and differentials. These have a rated maximum speed of about 105km/h. The first units were introduced in 1993-94. A newer variant of the DEMU from ICF has been spotted on the Ahmedabad - Abu Road section with two underslung Cummins NT 855R engines each driving a traction alternator whose output is fed to 4 traction motors. A new aerodynamically

Where are the oldest rails to be found on IR?

July 19, 2019

Most of the very old tracks have by now been relaid and renovated, so that it is very hard to find very old rails. Good bets are the meter-gauge and narrow-gauge lines that don't see much traffic. Abandoned lines (such as at the Bombay Port Trust railway) also sometimes have very old rails left intact. The Bombay Port Trust railway tracks between

Sometimes the sides of rails appear to be painted. Why is this done?

July 19, 2019

Normally, rails do not need to be painted as the expected life span resulting from the effects of wheel wear and fatigue is such that corrosion is not a significant problem. In some areas, however, corrosion of rails, especially on the inside of the rail foot below the liners, or on the sides, can be quite severe, and may result in the need for

What are the small vertical sections of rail that can be seen embedded in the trackworks or a little distance away from the tracks every so often?

July 19, 2019

These small vertical pieces of rail (or other structures such as a small cement post), usually painted yellow or white, are monuments or vertical datum indicators. They have marks on them that indicate the correct intended height of the rail head at that location on the track. When track maintenance crews adjust track for its level, they use these

What is included in the 3-tier maintenance regime?

July 19, 2019

The three-tier system divides responsibilities for track maintenance as follows: 1. On-Track Machines (OMU). Mechanized maintenance (see above) including systematic tamping, intermediate tamping, shoulder ballast cleaning, ballast profiling and redistribution, track stabilization, and periodic deep screening of ballast. 2. Mobile Maintenance

Does IR use mechanized means for track laying and maintenance?

July 19, 2019

IR has used some track-laying equipment, but much track is still laid manually. A lot of track maintenance is also done manually, with a veritable army of gangmen that are out 'on the line' to inspect track and fix problems. There is, however, a big push to mechanize track maintenance -- the target being complete mechanization by 2012. Tie

What are Rational Formulae? What is Maflin’s Formula? What is the Special Committee Formula?

July 19, 2019

These are various formulae for calculating the gang strength required to perform maintenance of different kinds on a section of track. Maflin's Formula, adopted in 1931, is a very simple one (number of gangmen = 2.5 x 'unit per mile' x length of track, where the 'unit per mile' factor depends on the kind of traffic carried on the track). It

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Does IR operate diesel-electric or diesel-hydraulic multiple units of any kind?

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