How much retarding force, per axle, can each SD-60 locomotive with high capacity dynamics and extended range produce?

The correct answer regarding the retarding force produced by each SD-60 locomotive with high capacity dynamics and extended range is 13,500 pounds per axle. This figure is critical for understanding the performance capabilities of the locomotive when it comes to braking and controlling train speed in various operating conditions.

The design of the SD-60, specifically its dynamic braking system, allows for this amount of retarding force. High capacity dynamics imply an enhanced ability to convert kinetic energy into electrical energy during braking, which in turn contributes to the locomotive's overall braking efficiency. The extended range feature signifies improvements that allow the locomotive to sustain braking forces over longer periods without causing overheating or compromising performance.

Recognizing this retarding force is essential for train handling practices, as it helps engineers gauge the effectiveness of brakes in emergency situations, while also influencing operational decisions such as train speed on certain grades or in adverse weather conditions. Proper understanding of these parameters allows for safer and more efficient train operation.