Ignite your curiosity with this innovative cutting-edge Stirling engine kit! This outstanding vertical metal motor runs on an powerful alcohol burner, providing a fascinating demonstration of thermodynamics in action. https://e-bikeaccessories.com/product/5-cylinder-radial-engine-model-kit-that-works-build-your-own-radial-engine-teching-1-6-full-metal-radial-engine-model-kit-250pcs/