Tarot Enlarged Alloy Stirling Engine Hot Air Model Educational Science and Discovery ToysAerodynamics are rich in knowledge of physics single cylinder combustion engine Engine principle is intuitive educational toys teaching experimental equipment caneffectively cultivate childrens interest in learning can also be used for classroomteaching more intuitive and easy to understand SpecificationsMaterial Copper Alloy Stainless StellColor GoldSize 210 x 115 x 175Diameter of Wheel 90mmStoves Size 55 Diameter x 71mmWeight 1471 5gAlcohol Burners Size 36mm x 38mmRunning Time 30minNote There will be the operation of steam when the steam too much the engine will stop working inside and outside the needle often set aside to reduce friction Do not rotate the nut too tightly otherwise the glass is broken if the piston is cracked can be bonded with glue The alcohol lamp wick do not touch the glass do not get too tight ring Pulling the piston connecting rod can not force the front end because the frontend is easy to breakPackage include1 x Stirling Engine1 x Alcohol Burner