Very old Stirling Cycle engine Flywheels turn freely. It looks well built and substantial. When you turn the flywheel the motion is double action in the piston. Quite showy and good size. The flywheel is about 5 in diameter. Check out the photos for condition. The whole thing, from the end of the board to the end of the can is 15 1/4 long. The vanes on the piston are about 4. The item “Antique Large Stirling Cycle Hot Air Engine Well Made Hit Miss Steam” is in sale since Friday, January 26, 2018. This item is in the category “Toys & Hobbies\Vintage & Antique Toys\Other Vintage & Antique Toys”. The seller is “*mechanical_man*” and is located in Zionsville, Pennsylvania. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica.