Features 1??Exquisite and simple appearance, simulate the original shape of the tank, the decorative weapon makes the tank model more realistic. 2??The main components are made of staniless steel for durability and inoxidizability, and the tracks are made of rubber to make it and light in overall structure. 3??The tank has a safe alcohol lamp mounting bracket. The light structure and sufficient power make the tank have a certain ability to cross obstacles. 4??The burning alcohol lamp provides heat to expand the internal gas, increasing the power of the internal molecular gas acting on the flywheel. With the help of the flywheel, the heat energy is converted into mechanical kinesthetic energy. 5??Education and fun through practical operation, you can observe the entire process of operating the stirling engine, a more intuitive understanding of the stirling principle and deepen your interest in physics. 6??The product has been assembled and can be used directly, not only is it a great educational toy for kids, but it can also be used as a collectible. Specification Condition: Item Type: Stirling Engine Model Material: Stainless Steel Color: As Pictures Shown Instructions: 1. Buy 95% alcohol (commonly sold in pharmacies). The alcohol with a concentration lower than 95% has a low burning value, which may cause the district motive to engine model. 2. Add about 2/3 of alcohol to the alcohol lamp (not full, it is easy to overflow when full). 3. Then ignite the alcohol lamp to preheat the heating cylinder for about 2 minutes; take the front end of the car as the standard, pull the flywheel clockwise to give the engine an initial power, otherwise the engine will not run. (The larger the flame, the greater the strength when pulling the flywheel, and the easier the engine starts.) Package List 1 x Tank Engine 1 x Needle 1 x Tweezers 1 x Light 1 x Alcohol Cylinder 1 x Glass Tube 1 x Rubber Band 2 x Rubber Ring 1 x Rope