Which dynamic brake system offers maximum retardation in handle position 4 at higher speeds?

The taper dynamic brake system is specifically designed to provide maximum retardation at higher speeds, particularly when the handle is in position 4. This system utilizes a gradual application of braking force that increases in effectiveness as the train’s speed increases. The taper system reduces the likelihood of wheel slip, which can occur at higher speeds with other braking systems that may not be optimized in the same way.

In position 4, the taper system allows for a more aggressive braking response without exceeding the adhesion limits of the wheels on the tracks, ensuring that maximum braking efficiency is achieved while maintaining control over the train's deceleration. This feature makes the taper system particularly advantageous for situations where significant retardation is needed at higher speeds, promoting both safety and operational effectiveness in braking scenarios.