The one-man "Rotorcycle" a manufactured by the Gyrodyne Co. of America - made a very impressive European debut in Stuttgart, West Germany, June 11. Powered by a 65-horse-power German Porsche caging, enthusiastic experts predict that it will quickly become the average man's vehicle of the air.

Seated among the tubular fuselage construction, the pilot brought laughter and gasps of admiration from the crowd as he demonstrated the machine's extremely simple control mechanism. From hovering high in the air, he seemed down to grown level and up again to complete a manoeuvre by flying in reverse. Coming in to land, he touched down without the slightest bump.

Weighing just 550-pounds the "Rotorcycle" was designed to meet civil and military requirement. The manufacturers claim it to be the world's first truly successful two-bladed coaxial helicopter in production.

Able to be flown by personnel with a minimum of training, and readily maintained in field operations without special tools and equipment, the "Rotorcycle" is now being produced for the U.S. Marine Corps and the U.S. Navy.