What is the brake pipe pressure when fully charged on a PA4 train?

The brake pipe pressure when fully charged on a PA4 train is 110 psi. This pressure is critical for ensuring that the brake system functions effectively, providing the necessary force to engage the brakes when required. Maintaining a consistent and correctly calibrated brake pipe pressure is vital for the safety and efficiency of train operations, as it directly affects the braking performance.

In the context of train operations, the specified pressure ensures that air is adequately distributed throughout the brake system so that all cars in the train receive the necessary air supply to apply the brakes as intended. Understanding the standard brake pipe pressure is fundamental for engineers and operators who work with train systems to ensure proper functioning and adherence to safety protocols.