Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1980-09-22
1982-12-28
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244199, 244123, B64C 3908, B64C 300
Patent
active
043657737
ABSTRACT:
An aircraft having a fuselage and a pair of first airfoils in the form of wings extending outwardly from the vertical tail and a pair of second airfoils in the form of wings extending outwardly from the forward portion of the fuselage at a lower elevation than the first airfoils. The second wings extend rearwardly having a positive dihedral so that the tip ends of the second airfoil are located in close proximity to and may overlap the tip ends of the first wings. The pairs of wings along with the fuselage present a double triangle or diamond shape in both front elevational view and top plan view. A winglet structurally connects the tip ends of the corresponding first wings and second wings, and these winglets have airfoil surfaces which extend vertically substantially beyond the tip ends of the first and second wings in order to minimize the effects of induced drag and also to augment directional stability of the aircraft. In addition, a unique wing structure is disclosed where the average thickness varies along the chord of the wing to enhance resistance to the component of lift acting normal to the spanwise plane containing the centroids of the airfoils.
REFERENCES:
patent: 2343645 (1944-03-01), Dickinson et al.
patent: 2406625 (1946-08-01), Oglesby
patent: 2984439 (1961-05-01), Fletcher
patent: 3780969 (1973-12-01), Nussbaum et al.
patent: 3834654 (1974-09-01), Miranda
patent: 3845918 (1974-11-01), White, Jr.
patent: 4053125 (1977-10-01), Ratony
patent: 4090681 (1978-05-01), Zimmer
patent: 4146199 (1979-03-01), Wenzel
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