What is Versine in curve?
What is Versine in curve?
Given a chord between two points in a curve, the perpendicular distance v from the chord to the curve (usually at the chord midpoint) is called a versine measurement. For a straight line, the versine of any chord is zero, so this measurement characterizes the straightness of the curve.
How do you calculate equilibrium Cannot?
The equilibrium superelevation/cant necessary for any speed is calculated from the formula:
- C = GR2/127V.
- C = RV2/127G.
- C = V2/127GR.
- C = GV2/127R.
What is the maximum amount of cant allowed on curves?
The maximum value of cant (the height of the outer rail above the inner rail) for a standard gauge railway is approximately 150 mm (6 in).
What is turn in curve?
Discussion :: Railways – Section 3 (Q. 19. A turn-in-curve is defined as. [A]. a curve introduced between two straights. [B].
How do you measure a track curve?
In the United States, the measurement of curvature is expressed in degree of curvature. This is done by having a chord of 100 feet (30.48 m) connecting to two points on an arc of the reference rail, then drawing radii from the center to each of the chord end points.
What do you mean by equilibrium cant?
For a constant speed of a running train, the amount of required cant to achieve the balance is called equilibrium cant. In practice, trains are not running on equilibrium cants at curves.
How is cant measured?
The Standard defining the cant measurement It is expressed as the height of the vertical leg of the right-angled triangle having a hypotenuse that relates to the nominal track gauge plus the width of the rail head rounded to the nearest 10 mm (refer to Figure 5).
Which of the following is the correct formula for the degree of curve?
Which of the following is the correct formula for the degree of curve? Explanation: Angle subtended by a 30.5m chord or degree of curve is given as 360°x30. 5/2πR. This when simplified is equal to 1750/R, where R is in metres.
How do you calculate track twist?
Twists are measured across the four-foot and can be calculated by taking the difference between two readings taken 3 metres apart. (5 sleepers). These readings in millimetres are then used to calculate the twist gradient.