everything about rail system…

Rolling Stock Terms

This page will be continuously updated… Accelerometer A device that can measure acceleration generated by the movement of an object along an axis. Adhesion (Coefficient of) During rolling contact, the … Continue reading

Track Circuit

Most railroads use track circuits to determine which sections of track are occupied by trains. These devices are actually fairly simple in design, and have been in use since 1872. … Continue reading

Rail-wheel Lubrication

Rail and wheel wear can be reduced dramatically by proper lubrication. In addition, lubrication can help in saving energy and reducing noise. Rail-wheel lubrications applies by automaticly or manually. Advantages of automatic lubrication; Maintenance … Continue reading

Electric Traction Systems

The system which use electrical power for traction system i.e. for railways, trams, trolleys, etc. is called electrical traction. The track electrification refers to the type of source supply system that … Continue reading

Axle Counter

An axle counter is a device on a railway that detects the passing of a train between two points on a track. A counting head (or detection point) is installed … Continue reading

Train Depot Area

A train depot is where trains are stabled and maintained. The depots have infrastructure to maintain the rakes with necessary facilities viz stabling lines, scheduled inspection lines, workshop for overhaul, unscheduled maintenance … Continue reading

Critical Velocity for Smoke Control

The ventilation system would be operated to force the  smoke and hot gases in the direction of the empty tunnel to provide a clear and safe environment behind the fire … Continue reading

Baku Metro Fire (1995)

In October 28, 1995, an electrical failure led to a fire on one of the trains in Baku’s Metro. The electrical failure caused a fire in the fourth of five … Continue reading

Sliding Doors

Sliding Doors A door in which the panel or panels slide open and closed on a hanger mechanism that is  usually mounted above the doorway opening. A sliding door system … Continue reading

O’Hare CTA station train crash (2014)

On March 24, 2014, a Chicago Transit Authority (CTA) passenger train overran the bumper at O’Hare subway station, injuring 34 people. The cause is under investigation. The front car of … Continue reading

Scroll Compressor

A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. In rolling stocks, scroll compressor is used for HVAC … Continue reading

Structure Gauge and Kinematic Envelope

To ensure that the path required for the passage of trains is kept clear along the route of a railway, a “structure gauge” is imposed. This has the effect of … Continue reading

Pantograph

Pantograph is an apparatus which mounted on the roof of electric train to collect power through with an overhead tension wire. It lift or down on the basis of the … Continue reading

Bogie

In mechanics terms, a bogie is a frame work which carrying wheels attached to coaches. The bogie, or truck as it is called in the US, comes in many shapes … Continue reading