Switch angle depends on both (heel divergence) and (length of tongue rail)

Explanation:

Introduction: Switches, also known as turnout or points, are an essential component of railway tracks that allow trains to change from one track to another. The switch angle refers to the angle at which the rails diverge from the main track.

Heel divergence:
- Heel divergence refers to the distance by which the heel of the switch rail is set back from the gauge side of the stock rail.
- It is an important factor in determining the switch angle.
- The greater the heel divergence, the greater the switch angle.
- Heel divergence is influenced by various factors such as the type of switch, the speed of trains, and the design specifications.

Length of tongue rail:
- The tongue rail is the moving rail that connects the switch rail to the stock rail.
- The length of the tongue rail also affects the switch angle.
- A longer tongue rail will result in a smaller switch angle, while a shorter tongue rail will result in a larger switch angle.
- The length of the tongue rail is determined based on the design requirements and the specific track layout.

Dependence on both factors:
- The switch angle is influenced by both heel divergence and the length of the tongue rail.
- The heel divergence determines the initial position of the switch rail in relation to the stock rail.
- The length of the tongue rail determines the distance over which the switch rail moves to reach the desired position.
- Together, these factors determine the final switch angle.
- If either of these factors is not considered or not designed properly, it can lead to operational issues, such as derailments or excessive wear on the switch components.

Conclusion:
- In summary, the switch angle depends on both the heel divergence and the length of the tongue rail.
- Proper consideration and design of these factors are crucial for ensuring safe and efficient train operations.