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In some case a couple of days may delay which is subject to your local custom-clearance process. On the heating tube, this does not means a used item, if you have concern on this issue, please skip off this item, thank you for understanding!That may incur in your country, when incur, it would be at your own responsibility to take care of. 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 the stirling engine 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 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. Exquisite workmanship, good for personal collection and or gift presentation for home decoration. Mini Classic Car design, super cool! Materials : Brass (Wheel + Driver Seat + Steering Wheel) + Aluminum Alloy + Stainless Steel + Glass + Sponge. Design : Low Temperature in Floating Piston. Unit Dimension : 270mm(L) x 115mm(W) x 145mm(H). The engine will come exactly as the pictures show, all pictures post here are truly captured. 1 x Fully Assembled Engine Unit as the pictures show. This item is in the category "Toys & Hobbies\Models & Kits\Tools, Supplies & Engines\Paints". The seller is "coptel_technology" and is located in this country: CN. This item can be shipped worldwide.