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Stirlingtechonline is exclusive distributor and the owner of the brand "SunnyTech"----Please be sure you receive an authentic SunnyTech stirling with SunnyTech logo and only sold by Stirlingtechonline to ensure 1-year 100% Satisfaction Guarantee.
Low Temperature stirling,Size - 3.93 x 3.93 x 4.72.run freely on top top of hot water or cold ice
It is a amazing and fantastic product at this price,it can be a great gift to your families or friends. It also can be used for teaching purpose.
Education Toy Kit (easy to put the flywheel to the support shaft)
please contact stirlingtechonline if your package doesn't come with manual

Description

Package:Sunnytech package, Sunnytechtech LOGO printed. , great gift for boy or girl friend, parents, kids,etc

Features:
speed up to 180-200 RPM
Start temperaure difference:20 oC
Color:Silver Bottom Gold Flywheel
Material :steel and Glass
Size:100X100X140mm
Weight:250g

Attention:
1.If there is a little noisy, ONLY use a little graphite dry lube quieted it down nicely.
2.Prohibit to add oil to lubricate.Because the oil 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.

What is the stirling engine?
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.

How it works?

This is traditionally known as an external combustion engine in contrast to an internal combustion engine where the heat input is by combustion of a fuel within the body of the working fluid. Unlike the steam engine's use of water in both its liquid and gaseous phases as the working fluid,the Stirling engine encloses a fixed quantity of permanently gaseous fluid such as air or helium. As in all heat engines, the general cycle consists of compressing cool gas, heating the gas, expanding the hot gas, and finally cooling the gas before repeating the cycle.

You can put the stirling motor toy in top of hot water to make the temperature difference. You also can put it in top of ICE to get the termperature difference, Just enjoy the toy!