Quick Answer: The Heros Engine is a 70 mm borosilicate glass bulb with jetted side arms on a metal stand; when about 25 cm³ of water is boiled inside, the issuing steam causes rapid rotation.
Last updated: October 2026
Key Features
Borosilicate glass bulb, 70 mm diameter
Side arms bent at right angles and formed into jets at their tips
Metal stand leaves the bulb free to rotate about its horizontal axis
Supplied complete on stand
Base dimensions of 180 mm x 120 mm
Technical Specifications
Specification
Value
Bulb
Borosilicate glass, 70 mm diameter
Base
180 mm x 120 mm
Water charge
About 25 cm³
Supply
Complete on stand
About This Product
About 25 cm³ of water is introduced into the bulb and boiled. Steam issuing from the jets on the side arms causes the bulb to spin rapidly on its stand, illustrating energy transfer. Export supply of the Heros Engine can be arranged to laboratories and schools in Cameroon, Brazil, Republic of the Congo, Indonesia, Comoros and South Africa.
Frequently Asked Questions
Q1. What volume of water goes into the bulb? About 25 cm³ of water is introduced into the bulb and boiled.
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