Patent ID: 6293497
Filing Date: 2001-09-25
Classification: B64C,Y02T

Abstract:
A commercial jetplane capable of flying at a cruise speed of Mach=0.78 or above, comprising:a fuselage;a landing gear mounted on said fuselage;a single wing attached to said fuselage, said single wing being substantially unswept with a high aspect ratio, and including:a forward airfoil element having an upper surface and a lower surface;an aft airfoil element having an upper surface and a lower surface;an internal structure comprising at least two spars extending from one tip to an opposing tip of said single wing, with a rear one of the spars being straight and unswept in plan view;an airfoil structure having a slot that allows airflow from the forward airfoil element to the aft airfoil element, wherein during cruising flight of the airplane, said airfoil structure having said slot diverts some of the air flowing along the lower surface of the forward airfoil element to flow over the upper surface of the aft airfoil element, and where the lower surface of the forward airfoil element and the lower surface of the aft airfoil element are shaped to provide an efficient cross section for a main structural box of the single wing; andsaid wing and said fuselage being constructed of at least one of aluminum and graphite composite.