⚜EASY OPERATION- Placing the engine on top of a freshly made tea, coffee or boiled water,wait for 20 seconds,give the flywheels a gently turn, it will be smooth-running quietly and slowly for around 30 minutes. Power piston goes with faint sounds when the flywheels is rotating, which even quieter than the tick tock sounds of your clock. Enjoy physical powertrain mechanism display, It will definitely be a great conversation piece on your desk. ⚜UPGRADED DESIGN: Aluminum and brass are combined to form a gleaming stirling engine with no screws protruding, featuring hollow brass struts for enhanced high insulation, flywheel with skeleton design brass rim for smooth and fast operation, micron precision borosilicate glass cylinder and graphite power piston for ultra-low friction, the entire stirling engine runs quietly and noiselessly, and every metal part is specially anodized to ensure this engine always shines ⚜EXCELLENT ARTWORK FOR ENGINEERING PHYSICS ENTHUSIASTS-It will be a great conversation starter for everyone around you; a cool desktop piece amazing your friends and colleagues; a great gadget to kill time when boring; a relaxing stress relief physics toy for people in the office; an impressive gift for your families, friends, especially for engineering/physics lovers. It can be used for teaching physics, great to display basic principles of a Stirling engine and to show the art of design. ⚜MORE WAYS TO PLAY HZZ92-Stirling Engine converts small temperature differences into motion. As long as one plate is warmer than the other, then the engine will run. It does not matter which plate is hotter as long as the other plate is colder. It is possible to run on a variety of heat sources, including boiling water, hot tea or coffee, placing the engine on a bowl of ice, heating the top plate, and then the engine will run in reverse. ⚜PFCKE'S BRAND QUALITY ASSURANCE - We provide 12-Month Warranty for any quality issues. If you're not 100% completely satisfied with your stirling engine, just simply contact us and we will refund or replace your product immediately. Please contact us first if you have any question about our products, our support team will try our best to help you solve all the issues. email reply within 24hs.
Quick Start and Precautions:
1, Place the engine on a flat table and add hot water with more than 4/5 capacity of the cup into the flat cup with a mouth less than 88mm.
2, The engine will not start automatically. Under the premise of enough safety, place the engine on the mouth of the cup and heat it for about 20 seconds, then move the flywheel clockwise by hand until the engine runs.
3, It is forbidden to add oil into the engine cylinder, piston, bearing, connecting rod and other moving parts!
4, The engine can run with only a very small temperature difference between the top and bottom, anything hotter than boiling water will damage the device. Do not place it on any objects with high temperature (stove, wood burning fireplace, candle, etc.), otherwise many parts of the engine will be melted.The highest temperature to run the HZZ92 engine should not exceed 100°C(212°F).

HZZ92 Stirling Engine Features:
1，Piston Stroke: 8mm
2，Flywheel Diameter: 83mm
3，Base Diameter: 92mm
4，Total Height: 133mm
5，Micron precision Borosilicate glass cylinder and Graphite power piston,
6，Stainless steel screws
7，Low-profile heat insulated chamber pillars
8，Giving flat bottom and good surface contact with heat source
9，Both connecting rods are positively located using low friction POM and stainless steel screws
10，All airtight seals are made with high strength precision screw threads and nitrile O rings
11，Ultra low friction demagnetised and de-greased bearings, NO lubrication required
12，Fully CNC machined, giving crisp, clean and tidy edges all over

Package List:
1 x Stirling Engine
1 x User's Manual