PM Research's "Original" Stirling EngineREADY TO RUNThis miniature Stirling Engine measures 7 x 4¼" and is complete with a built-in alcohol burner. Red flywheels and chassis are mounted on a green base,and runs at speeds in excess of 1,000 RPM and is sure to attract attention and create admiration wherever it is displayed. This model comes completely assembled and ready to run, accompanied by PM Research’s "Stirling Cycle Engines" book.