What is the maximum number of dynamic brake axles allowed at the head end of a train with 4 SD-60 locomotives?

The maximum number of dynamic brake axles allowed at the head end of a train with 4 SD-60 locomotives is determined by the dynamic brake capabilities of each locomotive and the overall configuration of the train.

Each SD-60 locomotive is equipped with 6 axles, and they can be utilized to provide dynamic braking. When a train is configured with 4 SD-60 locomotives, the combined total number of axles available is 24 (4 locomotives x 6 axles each = 24). However, dynamic braking systems typically allow for a maximum of 28 active dynamic brake axles on the head end of the train.

This configuration allows for enhanced braking power and improved control during descending grades or when heavy braking is required. Utilizing the full capacity of the dynamic braking system improves the overall train handling performance, especially when heavy loads or longer trains are involved. Thus, the maximum number of dynamic brake axles allowed in this situation is 28, which aligns with operational guidelines ensuring safety and efficiency in train handling.