Patent ID: 7533851

Claim:
A kite comprising: a single flexible sheet having: a top and bottom surface, a longitudinal centerline having a length dimension; opposing side edges, located symmetrically about the centerline, and a forward leading edge having two angled portions extending symmetrically rearward from a leading edge peak to the side edges; a slit within the sheet, the slit parallel to the leading edge portions and offset behind the leading edge an offset dimension, the slit and the leading edge defining between them an elongated forward sheet portion, the forward portion separated from a rear sheet portion by the slit; the slit having terminal ends, each end located separated from a respective adjacent sheet side edge by a transverse margin dimension, the margin dimension equal to at least 50 percent of the offset dimension; the offset dimension being no more that 20 percent of the overall length dimension; and means of securing a string to the forward sheet portion; such that when the sheet is restrained by a string secured to the forward sheet portion between the peak and slit, and an air current impinges against the bottom surface of the sheet, the rear portion will separate from the forward portion along the slit and flex upward to form a generally concave bottom surface and the forward portion will flex relatively downward to form a leading edge wing.