I can't say for certain what brand Hughes' contraption is, but it looked like a Bensen. Igor Bensen was a Russian-born engineer who started the gyrocopter craze, and with it the Popular Rotorcraft Association, in the 1950s. He coined the term gyrocopter, which has come to be applied to the simplest, most basic type of what is generically called a gyroplane. His gyrocopter was a boiled-down version of the ideas of Juan de la Cierva, the Spanish creator, in 1920, of the original gyroplane. De la Cierva's "autogyro" — later licensed in the United States under the name of Pitcairn — was an aircraft of considerable sophistication and complexity; Bensen's consisted of nothing more than a cruciform chassis with three little wheels, a seat, a mast, a rigid rotor and a two-stroke, four-cylinder McCulloch drone engine driving a pusher propeller.