Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1975-11-17
1977-04-05
Reger, Duane A.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244113, B64C 350
Patent
active
040157873
ABSTRACT:
An aircraft wing having a relatively thin airfoil cross section including a main body portion and a plurality of auxiliary airfoil sections disposed at the trailing edge of the wing and movable relative to the main body portion and to one another. In a normal cruise position the auxiliary sections and the main body portion form a complete airfoil having a substantially contiguous and unbroken exterior airfoil surface which preserves the high speed characteristics of the wing. At least two of the auxiliary sections comprising a leading auxiliary section and a trailing auxiliary section are movable about a common hinge member carried by the main body portion, while another auxiliary section also hingedly connected to the main body portion is positioned relative thereto in response to the position of the other auxiliary sections. The movement of these auxiliary sections is programmed and operable by a position regulating mechanism that is contained within the confines of the relatively thin airfoil and is operable to substantially improve the wings lift generating capability by cooperating to provide a highly cambered airfoil when deployed while simultaneously exposing a duct to channel ram air flow in a manner which will accelerate the flow and augment the boundary layer flow over the airfoil and its deployed auxiliary airfoil sections. The auxiliary sections are also capable of being deployed so that they extend significantly into the airstream above and below the exterior surfaces of the main body portion and thereby spoil the air flow and create an aerodynamic brake which is caused by the exposure of the large surfaces to the airstream and the effective trapping of a large volume of air within the confined duct area fromed by deploying the auxiliary sections in this manner.
REFERENCES:
patent: 2772058 (1956-11-01), Grant
patent: 2899152 (1959-08-01), Weiland
patent: 2920844 (1960-01-01), Marshall et al.
patent: 3921942 (1975-11-01), Bracka
Maieli Joseph R.
Rosenthal Gordon
Torrillo Domenick T.
Barefoot Galen L.
Fairchild Industries Inc.
Reger Duane A.
York Michael W.
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