Hero's Engine - Eolipile

Hero’s Engine (Eolipile) – Demonstration Steam Turbine Model

Hero’s Engine, also known as the Eolipile, is a functional demonstration model of one of the earliest recorded steam turbines. This apparatus features a borosilicate glass bulb approximately 70 mm in diameter, fitted with two side arms bent at right angles and formed into fine jet nozzles at their tips.

Mounted on a stable metal stand, the glass sphere is free to rotate about its horizontal axis. When approximately 25–30 ml of water is introduced into the bulb and heated using a Bunsen burner positioned beneath, the resulting steam exits through the angled jets, producing reactive force and rapid rotational motion. The unit stands approximately 10 inches tall, with 5 to 6.5 inches of clearance beneath the bulb to accommodate a standard laboratory burner.

Key Features

Functional Steam Demonstration: Clearly illustrates Newton’s third law of motion through reactive steam propulsion.

Borosilicate Glass Construction: Resistant to thermal stress and suitable for repeated heating under controlled laboratory conditions.

Precision Jet Arms: Right-angled outlets concentrate steam flow to maximise rotational effect.

Stable Metal Stand: Supports the rotating bulb securely while maintaining safe clearance for heating.

Educational Physics Apparatus: Ideal for demonstrating early steam technology and energy conversion principles.

Shipped from our Manchester, UK Facility

All demonstration apparatus are securely packed for safe delivery. Orders are fulfilled from our Manchester-based facility, ensuring reliable UK dispatch. Burner not included. Please exercise caution during operation, as the unit involves open flames, hot vapour and heated glass surfaces.

• demonstrating reaction propulsion and Newton’s third law

• illustrating early steam engine principles in physics lessons

• teaching energy conversion from heat to mechanical motion

• historical demonstrations of ancient engineering concepts

Product Name: Hero’s Engine (Eolipile)

Bulb Diameter: Approx. 70 mm

Overall Height: Approx. 10 inches

Clearance Under Bulb: 5 – 6.5 inches

Material (Bulb): Borosilicate Glass

Stand Material: Metal

Water Capacity (Operational): Approx. 25 – 30 ml

Heat Tolerance (Glass): Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C

Burner Included: No