Hot Air Stirling Engine, Education Toys, Gift, Science project + Express shipping 2-6 business days to USA

Offer Express shipping takes an average of 2-6 business days for the package to arrive at its destination ````JA 1029 ~ Hot Air Stirling Engine Engine is fired by denatured alcohol burner . Heat is applied to the end of the glass cylinder . The cylinder is air-tight. Therefore air in the cylinder is permanently sealed inside the engine. This fixed amount of the air is heated & cooled , causing it to expand & contract , this driving the piston. As the displacer moves up , the air in the cylinder moves down to the hot side , so the air pressure inside the cylinder increase , pushing up on the piston . As the displacer move down , the air in the cylinder moves up to the cool side , so the pressure inside the cylinder decrease, pulling down on the piston. Specification:- Weight : 500g Sizes : 180mm x 65mm x 90mm Material : Cylinder - glass Base - wood Others - Aluminium 6061 (Video - https://www.youtube.com/watch?v=mX_ZIhvMWOg)