# The equilibrium superelevation/cant necessary for any speed is calculated from the formula:

284 views
in General
closed

The equilibrium superelevation/cant necessary for any speed is calculated from the formula:

1. C = GR2/127V
2. C = RV2/127G
3. C = V2/127GR
4. C = GV2/127R

by (30.1k points)
selected by

Correct Answer - Option 4 : C = GV2/127R

Explanation:

Equilibrium superelevation/cant:

It is the difference between the height of the outer rail and the inner rail on a curve.

Inner rail is taken as the reference rail and with respect to inner rail, outer rail is raised.

The objective of providing a superelevation: The objective of providing a superelevation to neutralize the effect of centrifugal force, achieve equal distribution of wheel loads, improve the comfort level of passengers, etc.

Superelevation or cant C = GV2/127R

Where

R = radius of rail in meter

V = Speed of train in km/hr

G = gauge of track

The maximum permissible limit for actual Cant or superelevation

 Track Speed < 120 kmph Speed > 120 kmph Broad Gauge 16.5 cm 18.5 cm Meter Gauge 10 cm Narrow Gauge 7.6 cm