Stirling Tank Engine Model Steam Power Engine Physics Science Educational Kits Condition: Item Type: Stirling Engine ModelMaterial: Stainless SteelColor: As Pictures ShownInstructions: 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.)