AIR RESISTANCE REDUCING DEVICE

PURPOSE:To enable reduction of air resistance, irrespective of air flow direction, by arranging numerous projections having a specific height, adjacently to each other on the plane of a solid body in contact with air flow. CONSTITUTION:In an aircraft 1, whose air resistance is required to be as small as possible, the surfaces of a fuselage 2, main wings 3, a tail wing 4, etc., which are in contact with air flow are composed of outer panels 5 equipped with air resistance reducing devices. That is to say, each of the outer panels 5 has on its surface numerous projections 6 of about 0.05mm high, arranged at intervals D of about 0.05mm. This arrangement significantly reduces the air resistance of the aircraft 1. Since the numerous projections 6 have no directivity with regard to air flow, they provide such an advantageous effect that air resistance can be always reduced irrespective of air flow direction.