Aircraft with circular wings

In an aircraft an approximately circular lower aerofoil having a leading edge and a trailing edge, an upper at least partly circular aerofoil concentric with and of essentially the same diameter as said lower aerofoil and vertically spaced from said lower aerofoil;

• a central engine duct disposed generally in the plane of said upper aerofoil and having open forward and rear ends, said central duct extending along the longitudinal center line of the aircraft;
• means defining a central corridor extending along said lower aerofoil parallel to and directly under said central engine duct, said central corridor being continuous with and connected to both said aerofoils;
• at least two side engine ducts disposed parallel to and symmetrically on opposite sides of said central duct, said side ducts having open forward and rear ends;
• a vertical wall extending between each of said side ducts and said lower aerofoils;
• and propeller means mounted in each end of each duct for rotation about the axis of the respective duct.