Beginning in 1915, A.O. Smith of Milwaukee and later Briggs & Stratton built the Flyer, a lightweight wooden-framed car with four unpowered wheels and a gasoline-powered "motor wheel" mounted at the rear like a motorboat's outboard engine. An A.O. Smith motor wheel, minus car, is displayed at the Toyota Commemorative Museum of Industry and Technology in Nagoya. I wonder if anyone tried to turn this into a powered unicycle.
by richard7k