Stirling Engine Runs from Heat Difference
Engine continues running with no battery.
Teaching & key ideas
What you do: Place engine on warm source and spin flywheel gently.
What students see: Engine continues running with no battery.
Why it works: A temperature difference drives expansion/contraction of trapped gas, converting heat to work.
Question to ask: What is the 'fuel' if nothing is burning?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: What is the 'fuel' if nothing is burning?