What would the blower speed be if the motor pulley were twice the diameter of the blower pulley?

In systems involving pulleys and speed ratios, the relationship between the diameters of the pulleys and their respective speeds is governed by the principle that the speed of a driven pulley is inversely proportional to its diameter.

When the diameter of the motor pulley is twice the diameter of the blower pulley, the pulley system effectively communicates that the motor pulley will rotate slower to maintain the same belt tension and balance. Specifically, if the motor pulley is larger, it completes fewer rotations compared to a smaller pulley, which means that the blower, attached to the smaller pulley, must rotate faster.

Consequently, if the motor pulley is twice the diameter of the blower pulley, it follows that the speed of the blower will be twice the speed of the motor. This relationship is a fundamental principle of mechanical systems that use pulleys for motion transfer, confirming that with a larger diameter motor pulley, the connected blower pulley will run at an increased speed relative to the motor.

This reasoning leads to the conclusion that the blower speed would indeed be two times the speed of the motor.