Thanks to your excellent clue PJ, I was able to locate the photograph. Unfortunately the information accompanying it is very sparse. All it tells me is that this is a photograph taken in Portland, Oregon in the summer of 1929, of a reverse tricycle with moveable vertical stabilizer which was attached to the steering system. It is referred to as the "freakmachine" weighing less than 200 pounds, and powered by a Harley-Davidson F head twin cylinder engine mounted amidships, providing enough power to reach a speed of 90 mph. Apparently the builder's name is unknown, but he must have been very brave (or very foolish) if he was willing to drive this vehicle at 90 mph.
