Gliding ring
First Claim
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1. A gliding ring comprising;
- a closed-figure airfoil having a planform comprising;
an upper and lower surface,a central opening,an inner perimeter encompassing said central opening,an outer perimeter encompassing said inner perimeter,an axis of revolution which is substantially normal to the planes described by said inner and outer perimeters,said airfoil having a cross-section comprising;
a line defining said lower surface,a convex line defining said upper surface, said convex line reaching a zenith which is the highest point on the airfoil section of said ring,a separator lip on said upper surface and located on or near said outer perimeter,said separator lip extending to a narrow peak which is higher than the immediately adjacent portion of said upper surface.
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Abstract
A gliding ring toy comprised of a closed-figure airfoil with a narrow separator lip on the outer perimeter of the upper surface in order to balance the aerodynamic lift, fore and aft, over a wide range of velocities in gliding flight.
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Citations
15 Claims
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1. A gliding ring comprising;
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a closed-figure airfoil having a planform comprising; an upper and lower surface, a central opening, an inner perimeter encompassing said central opening, an outer perimeter encompassing said inner perimeter, an axis of revolution which is substantially normal to the planes described by said inner and outer perimeters, said airfoil having a cross-section comprising; a line defining said lower surface, a convex line defining said upper surface, said convex line reaching a zenith which is the highest point on the airfoil section of said ring, a separator lip on said upper surface and located on or near said outer perimeter, said separator lip extending to a narrow peak which is higher than the immediately adjacent portion of said upper surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gliding ring comprising;
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an annular airfoil having a planform comprising; an upper and lower surface, a central opening, a circular inner perimeter encompassing said central opening, a circular outer perimeter encompassing said inner perimeter, an axis of revolution passing though the centers of said circular inner and outer perimeters which is substantially normal to the planes described by said inner and outer perimeters, said airfoil having a cross-section comprising; a lower surface which is substantially flat, except in the region of the outer perimeter as recited below, a convex line defining said upper surface, said convex line reaching a zenith at a location which is substantially one third of the distance from said inner perimeter to said outer perimeter, said zenith region being the highest portion of said ring, and a separator lip on said upper surface and located on or near said outer perimeter, said separator lip extending to a narrow peak which is higher than the immediately adjacent portion of said upper surface but lower than said zenith of said convex upper surface, a downwardly depending flap adjacent to said outer perimeter of said lower surface. - View Dependent Claims (11)
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12. A gliding ring comprising;
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a lower airfoil surface, an upper airfoil surface, a central opening; an inner perimeter encompassing said central opening, an outer perimeter encompassing said inner perimeter, an outer rim adjacent to said outer perimeter comprising; an outer rim surface extending from a bottom edge below said lower airfoil surface to a top edge above the outer portion of said upper airfoil surface, an upper-inner rim surface extending downward from said top edge of said rim to the outer portion of said upper airfoil surface, a lower-inner rim surface extending upward from said bottom edge of said rim to said lower airfoil surface, said upper airfoil surface having a cross-section described by a convex line extending from said upper-inner rim surface to said inner perimeter, said convex line reaching a zenith which is the highest point on the airfoil section of said ring, an axis of revolution substantially normal to the planes described by said inner an outer perimeters. - View Dependent Claims (13, 14, 15)
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Specification