*This item ships to all 50 United States within 1 business day (excludes holidays and weekends) via Priority Mail for a flat rate of $6.30! Most customers will see delivery within 2 business days thereafter. Rural customers and customers in AK & HI will see longer transit/delivery times. You can calculate specific transit times to your postal code by visiting http://postcalc.usps.com/ (our postal code is 45011). Note that postal service delivery time estimates are extremely reliable, but not guaranteed.
This fully assembled hot air twin flywheel stirling engine is as functional as it is beautiful. Each engine is carefully constructed of high quality CNC machined aluminum alloy and mounted on a wood laminate base. The engine is provided with a custom plastic carrying case with handle for transport and storage. The small footprint of this engine makes it ideal for classroom use.
Background & Concept
The Stirling engine is a high-efficiency heat engine invented by Reverend Robert Stirling of Scotland in 1816. Since its invention, there have been thousands of variations, all stemming from Stirling's original patent in the 1800's. The term hot air engine is a catch-all for any heat engine that uses the expansion and contraction of air under the influence of a temperature change to convert thermal energy into mechanical work. The engine is fired using the included denatured alcohol burner. Heat from the alcohol burner is applied to the end of an air-tight glass cylinder. The air in the cylinder is permanently sealed inside the engine. This fixed amount of air is heated and cooled, causing it to expand and contract, thus driving the piston. As the displacer moves up, the air in the cylinder moves down to the hot side, so the air pressure inside the cylinder increases, causing it to push up on the piston. Alternatively, as the displacer moves down, the air in the cylinder moves up to the cool side, causing the pressure inside the cylinder to decrease, and pulling the piston down. This process repeats over and over again, setting the wheel in motion.
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