Chattanooga, Tennessee-based Fly Hard Trikes makes a line of lightweight trikes, one of which is the Skycycle that can qualify as a Part 103 ultralight vehicle. In production for 13 years at the time our video was recorded. Proprietor Mike Theeke installs several engines according to a customer’s wishes. On this particular example, we see the Vernor V4 four stroke, electric start engine that produces 35 horsepower. See and hear more in this video.