There was a documentary made in 2003, about the building of two Wright Flyer replicas, to celebrate the 100th anniversary of powered flight, Â one version, was to use an oilhead engine, but somebody in the group, was a Harley enthusiast, and mentioned that H-D started business in 1903, the same year that the Wright brothers made their first powered flight, so they used an H-D V- twin engine instead .