The bore and stroke of the Aermotor measures 3-by-3-1/2 inches, respectively. The flywheel has a 20-inch diameter and 1-1/4-inch face width. The year of manufacture is unknown, but it was likely built in the early teens. Several casting numbers are found
The photos on this page were taken at the Francis Park Annual Bicentennial Memorial Festival & Celebration in Kewanee, Ill., July 4, 2005. It was the Aermotor’s first public debut.