Quick Answer:The Hero Engine is a glass model of the steam engine invented by Hero of Alexandria, showing thermal energy turned into kinetic energy as steam jets make the apparatus spin. A Bunsen burner is needed but not supplied.
Last updated: 18 October 2026
Key Features
Early example of a machine that turns thermal energy into kinetic energy.
Illustrates energy transformations and Newton's laws of motion.
Operates in a similar way to a rocket engine.
Glass apparatus rotates about its long axis.
Bunsen burner not supplied.
Technical Specifications
Specification
Value
Construction
Glass
Heat source
Bunsen burner (not supplied)
How It Is Used
Water in the glass vessel is heated with a Bunsen burner until steam escapes from the nozzles. By Newton's third law the jets push back on the nozzles, creating a turning effect that spins the apparatus.
Frequently Asked Questions
What makes the Hero Engine rotate?
Steam jets leaving the nozzles carry momentum, and by Newton's third law they give a backward force to the nozzles, creating a turning movement about the long axis of the glassware.