Stirling Engine Model Military Helicopter Design Science Metal Toy Collection Children Kids Educational Experiment Price_》$200 For Age: 14 years old

For Age: 14 years old or older

and the alcohol lamp is ignited on the premise of confirming safety

power cylinder inner diameter 16mm

if touched

Stirling Engine Model Military Helicopter Design Science Metal Toy Collection Children Kids Educational Experiment Price_》$200 For Age: 14 years oldArmed Version Helicopter Horizontal Single Cylinder Vacuum Stirling Model Toy Silver Features: Working Theory: burning alcohol lamp provides heat power to make the expansion of gas inside, then the gas molecular internal power increasing and working strongly to the flywheel. With the help of the rotating wing, heat energy will convert into mechanical work. Great educational toy, classroom or laboratory experimental teaching aids, cultivate children's