What is the appropriate brake cylinder pressure for locomotives with single brake shoe wheel rigging?

The appropriate brake cylinder pressure for locomotives with single brake shoe wheel rigging is indeed 72 psi. This pressure is crucial because it balances the need for effective braking power with the mechanical limits of the brake system. At 72 psi, the braking force is optimized to ensure efficient stopping without risking damage to the brake components or the wheels.

Brake systems are designed to operate within specific pressure ranges to maintain safety and performance. In the case of single brake shoe configurations, using a pressure higher than 72 psi could lead to excessive wear on the brake shoes and wheels, as well as potentially causing overheating or failure of the brake components due to overstressing.

On the other hand, pressures that are too low would result in insufficient braking force, compromising safety and increasing stopping distances, which could lead to accidents. This careful balance demonstrates why 72 psi is the standardized and most effective choice for single brake shoe wheel rigging in locomotives.