Ouija Windmill /念力棒 / VooDoo stick

Ouija Windmill /念力棒 / VooDoo stick

It's time to unleash your telekinesis powers. . .

The Ouija Windmill, also known as the gee-haw whammy diddle, the Voodoo Wand, and the Chinese name “念力棒”, is a scientific toy that can convert vibrations into rotation. It is an educational and entertaining parent-child toy suitable for all ages.
This model adopts an elliptical rod design, and the steering and speed of the blades can be controlled by twisting the angle and speed of the elliptical rod.

This toy has two principles
Elliptical vibration direction: The elliptical motion direction of the vibrating stick causes the direction of friction at the initial and other times, so the upper edge of the friction serration with different arcs can cause the propeller to rotate forward and reverse.
Synchronous acceleration method: Like the principle of hula hoop, the propeller and bearing are eccentric. For the propeller center of gravity that is performing approximately circular motion relative to the bearing, if the bearing moves perpendicular to the tangential speed of the center of gravity , the center of gravity will be added to a component of vertical velocity change, increasing the speed and thus accelerating the rotation.

The only secret to control is to practice more and find your own friction method. You too can become a true telekinesis master.
If you have fingernails, you can rub the rotating blade with your thumb or forefinger. If you don't, you can use printed pick for the same purpose.

Assembly and operation
1. Remove the support first.

2. To install the blade, please carefully push the blade into the stick slot.

3. Use your nails or pick to rub the protruding surface of the stick back and forth, and try to practice from slow to fast.

4. After you can successfully rotate the blade, you can try to control the forward and reverse rotation by rotating and rubbing the elliptical rod at different positions.