How do those yo-yos with the special clutches work?
The idea behind these yo-yos is to make it easier for the yo-yo to sleep . A “sleeping” yo-yo is a yo-yo that is spinning on the end of the string. You release the yo-yo, and when it gets to the end of the string it sits there spinning. By jerking the string you make the yo-yo come back. There are lots of tricks you can do while the yo-yo is sleeping, but sleeping is a hard skill to master. A normal yo-yo has a simple, polished shaft that connects the two halves of the yo-yo, and the string wraps around the shaft. It takes a good bit of practice to make a normal yo-yo sleep because the string has a tendency either to bind on the shaft or to never catch the shaft. The new yo-yos use a centrifugal clutch to make it easy for the yo-yo to sleep. The string is attached to a spindle, and the spindle is free to spin on the axle. Inside one half of the yo-yo is the clutch. When the yo-yo is not spinning (or is spinning slowly), the clutch clamps onto the spindle and holds it. When the yo-yo is
