Patent ID: 6599161
Filing Date: 2003-07-29
Classification: A63H,F41B

Abstract:
An airfoil launching system, which comprises:a rod having a first end and a second end; a support having a first side and a second side, being attached to said rod, and extending radially outward from said rod; a first set of resilient bands, said first set having a first end and a second end and having the first end connected to said support outward from said rod; a second set of resilient bands, said second set having a first end and a second end and having the first end connected to said support outward from said rod; a pusher slidably mounted on said rod between said support and the second end of said rod, said pusher comprising: a generally disc-shaped structure containing a central aperture sized to permit said pusher to rotate and to slide along said rod and having an outer diameter, wherein aid generally disc-shaped structure is composed of material having a coefficient of friction which will cause a ring airfoil placed on said pusher generally to rotate with said pusher and wherein a second end of said first set of resilient bands as well as a second end of said second set of resilient bands is attached to said generally disc-shaped structure at points of attachment outward from the central aperture; and a flange attached to said generally disc-shaped structure inward from the outer diameter of said generally disc-shaped structure wherein, said flange is sized to hold an inner side of a ring airfoil; a string guide rotatably attached to said rod at a point closer toward the second end of said rod than said pusher is located, said string guide extending radially outward from said rod; having a first side containing an aperture outward from the rod, having a second side containing aperture outward from the rod, and having a means for stopping rotation of said string guide about said rod; a first generally non-resilient cord having a first end attached, at a point of attachment, to said generally disc-shaped structure outward from the central aperture, having a second end, and passing through the aperture in the first side of said string guide; and a second generally non-resilient cord having a first end connected to said generally disc-shaped structure outward from the central aperture in a different location from the point of attachment for said first generally non-resilient cord, having a second end, passing through the aperture in the second side of said string guide, and having the second end of said second generally non-resilient cord connected to the said second end of said first generally non-resilient cord.