Propeller

The exhibit consists of four independent transparent water tanks, a rotating handwheel, and a display screen. Each transparent water tank is equipped with sequins and propellers with different numbers or shapes of blades. The four propellers are connected to an external rotating handwheel through screws. visitors can observe the sequins and water flow effects driven by different propellers by rotating the handwheel to determine their different driving speeds. At the same time, cooperate with the display screen to assist in understanding Newton's third law and the design principles of propellers. This exhibit aims to help visitors understand the basic principles of Newton's Third Law and how the shape and number of propeller blades affect the relationship between thrust and water flow through mechanical interactive devices. Visitors can directly experience the power generated by the rotation of propellers and understand the impact of propeller shape and quantity design on ship performance.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

According to Newton's third law, the forces of action and reaction between two objects are always equal in magnitude and opposite in direction. When the propeller of a ship rotates, it generates a backward thrust on the water, while the water generates a forward thrust on the ship. As an important component for driving ships, the shape and number of blades of propellers have a significant impact on the power performance. Therefore, when designing propellers, engineers must find the optimal balance to optimize the ship's speed, maneuverability, and fuel efficiency.