KIDA and MIYAI's theory on the minimum induced drag of nonplanar ground effect wings with small tip gaps is reviewed and modified. The derivation of the outer solution is substanltially simplified and reduced to an elementary procedure. A trivial error in obtaining the total lift is corrected, although it does not affect the final results. The final formulas obtained here are applied to the semi-circular and _??_ shaped GEWs.
All elastic moduli of unidirectional fiber-reinforced composites are analytically obtained. Main point of the present analysis is the consideration of anisotropy of fibers which is indispensable for the investigation of carbon composites. The hexagonal array model is employed for analysis as an idealized regular fiber packing arrangement. Computer programs with point matching technique are developed and many numerical results are given graphically. The effect of constituent anisotropic material properties on the elastic moduli of composites is described in detail.