Abstract: A surface effect craft of simple construction achieving improved operational stability and performance at various speeds. The craft includes first and second main wing sections merge into the central hull to form a continuous aerodynamic wing structure. The wing structures are very thick with maximum thickness ratio of wing thickness to chord length on the order of 25-30% with the first and second wing sections being swept back, merging into first and second vertical side wall directional stabilizers, the wing shaped structure forming a generally U-shaped rear section (as best viewed from a rear plan or sectional view). The craft preferably includes an aft elevated secondary wing structure extending between the first and second vertical side wall directional stabilizers whereby both the main wing sections and the aft elevated secondary wing structure provide lift.

Abstract: A surface effect craft of simple construction achieving improved operational stability and performance at various speeds. The craft includes a continuous aerodynamic wing structure having maximum thickness ratio wing thickness to chord length on the order of 30%. The outer wing sections are swept back forming a generally U-shaped rear section. The center of the craft preferably has a generally horizontal bottom forming a hydrodynamic planing surface having longitudinal concavities positioned on an underside thereof. The mass distribution of the craft is designed with an engine in the front and ducted fan propulsion system to the rear of the pilot's central seating position. This arrangement permits the pilot to utilize body movement to control the attitude of the watercraft during operation.