What occurs in a 'double heading' scenario regarding air brakes?

In a 'double heading' scenario, two locomotives are coupled together, which significantly impacts the brake system dynamics and control. This arrangement means that the air brake systems of both locomotives work in concert, allowing for more effective braking power since both units contribute to the overall braking force. The coupling involves the sharing of brake pipe pressure and the coordination of brake applications and releases between the two engines.

As a result, the dynamic interactions between the braking systems need careful management to ensure smooth operation. In a double heading scenario, the engineer must be aware of how the brakes will respond as a result of this coupling, especially when it comes to stopping distances and the overall balance of the train. This scenario requires understanding how to effectively manage the brake control systems of both locomotives together, making it crucial for safe and efficient train operations.