Many ingenious designs in the field of science and technology, such as the suspension control of hard drive read/write heads, lubrication schemes for precision bearings, and even aerodynamic research, rely on a deep understanding and application of fluid viscosity. Air viscosity, this macroscopic manifestation of microscopic intermolecular forces, though invisible and intangible, undeniably affects the behavior of moving objects, especially in high-speed relative motion between two surfaces with extremely small gaps, where its effect is crucial. Our "Air Viscous Frisbee" exhibit serves as a window into popularizing this key engineering principle. This 750*750*1500mm electromechanical interactive device is intuitive and inspiring to operate. Pressing the start button initiates the rotation of the upper active disc. Then, by manually controlling the handwheel, you can set a tiny air gap between the lower driven disc and the active disc. At this point, without any physical contact, relyi
