Similar to the working principle of internal combustion engines - Burning alcohol lamps provide power heating to expand the internal gas, thereby increasing the power of the internal molecular gas to act on the. With the help of the, the Through hands-on, observe the entire process of Stirling engine, more intuitively understand the working principle of stirling engine, and deepen your interest in physics. The working principle of the Stirling engine is to output power through a cycle of cooling, compression, heat absorption, and expansion of the working medium in the cylinder. The Stirling engine operates by cyclically compressing and expanding air or other gases (working fluids) at different temperatures, thereby converting thermal energy into mechanical work. By using the manual operation of the model to do experiments, you can observe the entire operating process of the Stirling engine, understand the working principle of the Stirling engine more intuitively, and use it to learn rich and colorful physics knowledge. Note:Due to different production batches, the product appearance slightly, which does not affect the use. Colour:As Shown Material:Zinc Alloy Package Contents: 1 * Stirling Engine Model Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.