The D-31 Turbulent was designed in France by the late Roger Druine as a single-seat, low-wing monoplane which would be simple to construct by an amateur.
The Fly Baby was designed by the well known American historian and homebuilt designer, Mr Peter Bowers, to compete in a design competition held by the United States Experimental Aircraft Association and was aimed at being a simple low-cost, easy to fly, amateur built aircraft to be built by inexperienced
This light single-seat helicopter was built in the Melbourne suburb of Black Rock and is believed to have been completed in about 1948. It took about two-years to complete and is thought to be, if not the first, one of the first helicopters designed and built in Australia.