Steam Power Generator Motor Double Cylinder For HotAir Stirling Engine Model Kit Description: Brand New and High Quality. A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work.The engine is like a steam engine in that all of the engine's heat flows in and out through the engine wall. Features: Engine principle is intuitive, educational toys. Exquisite workmanship made, high grade quality, good for gift presentation as well powerful, ready to run, good for physics teaching demonstration. It can effectively cultivate children's interest in learning can also be used for teaching purpose, more intuitive and easy to understand. This engine is perfectly for kids over 12 years old. Specifications: Material: Iron + Glass Color: Gold Size: 160mm/6.3'' x 87mm/3.43'' x 100mm/3.94'' Type: Double Cylinders Instructions: * The engine model on the horizontal position by hand toggle the flywheel to see if smooth, if there is a strong sense of raw astringent, check the connection rod is normal, whether the cylinder oil and dust, and if so, please use toilet paper to erase Not smooth. Toggle the flywheel feel pressure rebound within the cylinder body is a normal phenomenon, the cylinder is sealed. * The packing bag of alcohol lamp cotton wear into the metal cap lamp. * Please go to the pharmacy to buy 95% purity alcohol, anhydrous industrial alcohol better. Fill the alcohol lamp to less than two-thirds. * Alcohol lamp to the alcohol lamp, at the premise of ensuring safety, ignite the alcohol lamp about 2 minutes after the flywheel, until the flywheel automatic operation so far, the whole process of heating, hands may not touch. Warning: * Please adopt 95% to highgrade alcohol to be the fuel to make sure the air tank can get more temperature, and drive the stirling engine. Please do not full fill the alcohol. * After the alcohol lamp burn for about 2 minutes, please stir the Flywheel. * Do not rotate the piston too tightly, otherwise the glass will broken, if the piston is cracked, can be bonded with glue. * The lamp core of the alcohol lamp cannot touch the heating cylinder. * The connecting rod and crankshaft should not be too tightly, otherwise it will not work. * Prohibit to add any oil or water to the heating cylinder or the power cylinder.Because the oil or water will mix with dust in the air, and become a oil-dirt, finally make the friction to be even bigger. The stirling engine can't run freely. * Children accompanied by adults and parents to play. Please do not touch the cylinder after heated. Package Include: A Set of the Stirling Engine Model