👉 In physics, a whirler is a device used to generate and control angular velocity by spinning a disk or other rotating object. It is typically made of a material that allows it to spin rapidly and efficiently, such as iron, steel, or even a vacuum cleaner. The most common type of whirlers are air whirlers, which consist of a rotating disc that is filled with air and has a small hole in the center for airflow. The air whirler can be used to generate thrust or lift