Curve Lead Calculator

✖Switch Lead is the distance between the tangent point and the heel of switch measured along the length of the main track.ⓘ Switch Lead [SL]			+10% -10%
✖Crossing Lead is the distance between theoretical nose of crossing and the heel of switch measured along the length of the main track.ⓘ Crossing Lead [L]			+10% -10%

✖Curve Lead is the distance between the theoretical nose of crossing and the tangent point measured along the length of main track.ⓘ Curve Lead [CL]

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Formula

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Curve Lead

Formula

`"CL" = "SL"+"L"`

Example

`"30m"="8m"+"22m"`

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Curve Lead Solution

STEP 0: Pre-Calculation Summary

Formula Used

Curve Lead = Switch Lead+Crossing Lead
CL = SL+L
This formula uses 3 Variables

Variables Used

Curve Lead - (Measured in Meter) - Curve Lead is the distance between the theoretical nose of crossing and the tangent point measured along the length of main track.
Switch Lead - (Measured in Meter) - Switch Lead is the distance between the tangent point and the heel of switch measured along the length of the main track.
Crossing Lead - (Measured in Meter) - Crossing Lead is the distance between theoretical nose of crossing and the heel of switch measured along the length of the main track.

STEP 1: Convert Input(s) to Base Unit

Switch Lead: 8 Meter --> 8 Meter No Conversion Required
Crossing Lead: 22 Meter --> 22 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

CL = SL+L --> 8+22

Evaluating ... ...

CL = 30

STEP 3: Convert Result to Output's Unit

30 Meter --> No Conversion Required

FINAL ANSWER

30 Meter <-- Curve Lead

(Calculation completed in 00.004 seconds)

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Credits

Created by Smriti Singh

MIT Academy of engineering, Pune (MITAOE), Alandi, Pune

Smriti Singh has created this Calculator and 25+ more calculators!

Verified by Rachana B V

The National Institute of Engineering (NIE), Mysuru

Rachana B V has verified this Calculator and 50+ more calculators!

< 10+ Points and Crossings Calculators

Switch-Lead SL

Go Switch Lead = sqrt(2*Radius of Outer Curve of Turnout*Heel Divergence)

Curve Lead (C.L )

Go Curve Lead = sqrt(2*Radius of Outer Curve of Turnout*Gauge Length)

Switch Angle

Go Switch Angle = asin(Heel Divergence/Length of Tongue Rail)

Theoretical Length of Tongue Rail

Go Length of Tongue Rail = Heel Divergence/sin(Switch Angle)

Number of Crossing (N)

Go Number of Crossing = Spread at Leg of Crossing/Length of Crossing from TNC

Isosceles Triangle Method

Go Number of Crossing = (1/2)*cosec(Angle of Crossing/2)

Centre Line Method

Go Number of Crossing = (1/2)*(cot(Angle of Crossing/2))

Curve Lead (C.L ) if given N

Go Curve Lead = 2*Gauge Length*Number of Crossing

Right Angle or Cole's Method

Go Number of Crossing = cot(Angle of Crossing)

Curve Lead

Go Curve Lead = Switch Lead+Crossing Lead

Curve Lead Formula

Curve Lead = Switch Lead+Crossing Lead
CL = SL+L

Curve lead formula

Curve lead (CL): This is the distance from the tangent point (T) to the theoretical nose of crossing (TNC) measured along the length of the main track. Switch lead (SL) This is the distance from the tangent point (T) to the heel of the switch (TL) measured along the length of the main track.

How to Calculate Curve Lead?

Curve Lead calculator uses Curve Lead = Switch Lead+Crossing Lead to calculate the Curve Lead, The Curve lead formula is used to calculate curve lead which is basically distance between the theoretical nose of crossing and the tangent point measured along the length of main track. Curve Lead is denoted by CL symbol.

How to calculate Curve Lead using this online calculator? To use this online calculator for Curve Lead, enter Switch Lead (SL) & Crossing Lead (L) and hit the calculate button. Here is how the Curve Lead calculation can be explained with given input values -> 30 = 8+22.

FAQ

What is Curve Lead?

The Curve lead formula is used to calculate curve lead which is basically distance between the theoretical nose of crossing and the tangent point measured along the length of main track and is represented as CL = SL+L or Curve Lead = Switch Lead+Crossing Lead. Switch Lead is the distance between the tangent point and the heel of switch measured along the length of the main track & Crossing Lead is the distance between theoretical nose of crossing and the heel of switch measured along the length of the main track.

How to calculate Curve Lead?

The Curve lead formula is used to calculate curve lead which is basically distance between the theoretical nose of crossing and the tangent point measured along the length of main track is calculated using Curve Lead = Switch Lead+Crossing Lead. To calculate Curve Lead, you need Switch Lead (SL) & Crossing Lead (L). With our tool, you need to enter the respective value for Switch Lead & Crossing Lead and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Curve Lead?

In this formula, Curve Lead uses Switch Lead & Crossing Lead. We can use 2 other way(s) to calculate the same, which is/are as follows -

Curve Lead = sqrt(2*Radius of Outer Curve of Turnout*Gauge Length)
Curve Lead = 2*Gauge Length*Number of Crossing

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