Aeronautics and astronautics – Aircraft structure – Details
Patent
1994-05-20
1996-04-09
Kashnikow, Andres
Aeronautics and astronautics
Aircraft structure
Details
244 321, 244200, 244204, 244 46, B64C 138, B64C 354/21/10
Patent
active
055054099
ABSTRACT:
A method is described for reducing drag in airframes or airfoils. The method includes inducing cavitation in the boundary layer separating the airframe or foil skin and the air currents passing thereover to produce a reduced pressure area instead of turbulent flow. In one embodiment of this invention, a nose cone is provided for the airframe which at the juncture of its base portion provides a step between the terminal portion of the nose cone and the adjacent portion of the fuselage skin. This provides a circumferential step surrounding the fuselage which in its leeward direction induces the cavitation necessary to reduce drag. In another embodiment of this invention, steps can be provided longitudinally at mutually spaced circumferential locations extending from the front along the fuselage toward to the rear to ensure that a continuous boundary layer is provided of reduced pressure. In a third embodiment of this invention, the stepped areas are provided on the upper surface of an airfoil to extend lengthwise rather than circumferentially and provide the reduced pressure area along the upper surface to enhance lift as well as reduce drag.
REFERENCES:
patent: 1025210 (1912-05-01), Sheriff
patent: 1152426 (1915-09-01), McCarroll
patent: 2399839 (1946-05-01), Vorse
patent: 2980370 (1961-04-01), Takacs
patent: 4225102 (1980-09-01), Rao
patent: 4240596 (1980-12-01), Windernan et al.
patent: 4650139 (1987-03-01), Taylor et al.
patent: 4750693 (1988-06-01), Lobert et al.
patent: 4926130 (1990-05-01), Kranz
patent: 5133519 (1992-07-01), Falco
Blumberg Stanley
Wells Anthony R.
Kashnikow Andres
Mojica Virna Lissi
LandOfFree
Supercavitating airframe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Supercavitating airframe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supercavitating airframe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-134011