초록 ▼

A device capable of flight comprising a frame including first and second leading edte members, a keel interconnected to the leading edge members, a first cross member attached to the keel and to the first leading edge member, and a second cross member attached to the keel. The second cross member is

A device capable of flight comprising a frame including first and second leading edte members, a keel interconnected to the leading edge members, a first cross member attached to the keel and to the first leading edge member, and a second cross member attached to the keel. The second cross member is attached to the second leading edge member by a collar slidably mounted on the second cross member. A sail of flexible material is attached to the frame. The position of the collar along the second cross member can be adjusted to vary the billow of the sail.

대표청구항 ▼

A device capable of flight comprising: a frame including first and second leading edge members, a keel, and means for interconnecting said leading edge members to said keel so as to allow the leading edge members to be pivoted relative to said keel; said frame including first and second cross member

A device capable of flight comprising: a frame including first and second leading edge members, a keel, and means for interconnecting said leading edge members to said keel so as to allow the leading edge members to be pivoted relative to said keel; said frame including first and second cross members, means for attaching said first and second cross members to said keel to allow said cross members to pivot relative to said keel, and means for attaching the first leading edge member to said first cross member; a connector mounted on said second cross member for coupling the second leading edge member to the second cross member; said connector being mounted for movement along said second cross member from an extended position toward the keel to facilitate at least partial collapse of said frame; means for retaining said connector in said extended position; a mast attached to said keel; a flexible element having first and second spaced regions, said first region being attached to said mast; means other than said second leading edge member for attaching said second region to the second cross member oUtboard of said connector; and flexible material coupled to said leading edge members and forming a relatively broad surface to at least assist in supporting the device when the device is airborne.