大型高速WIGのIGE巡航時の設計点について

抄録

Some investigators of WIG, Wing-in-Ground effect vehicles, suppose that high values of lift coefficient (C_L) for WIG's are desirable at the cruising condition; it seems to result from the old term “Ram-Wing.” This paper treats high-speed large-scale WIG's only for transportation such as Orlyonok. It is shown that as higher cruising speed as possible is required for higher transportation efficiency and so considerable width of C_L values are necessary. Hence it is an important problem how the lower value of C_L may be allowable without deteriorating the operational efficiency. It is found that C_L of nearly 0.6 are acceptable and cruising speed of 480km/h is expected with effective aspect ratio of 10-12. Thus lower camber shapes of airfoil, which give the center-of-pressure of nearly 25-33% chord positions, may be usable against the image of “ram-wing.” It would bring an additional considerable merit that many troublesome problems of trim, stability and control may be solved much more easily.