If you are looking for Stirligkit Engine Model & accessories for a science project, goto stirlingkit and explore the products according to your requirement.
https://www.stirlingkit.com/collections/all-products

https://www.stirlingkit.com/products/water-cooled-four-stroke-gasoline-model-engine-kit-fs-s100gw

four-stroke cycle engine is an internal combustion engine that utilizes four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle. The piston make two complete passes in the cylinder to complete one operating cycle.

Stirlingkit providing best quality Stirling Engine Models and accessories toys for kids at the best price. https://www.stirlingkit.com/

Read our latest blogs here about Stirling Engines and Stirlingkit. https://stirlingkit.blogspot.com/2019/08/stirling-engines-different-models.html