Optimization of the sectional wing in ground effect (WIG) has been studied by using a high order numerical procedure and response surface method (RSM). Initially, the effects of the ground clearance, angle of attack, thickness, camber of wing have been investigated by a high-resolution scheme, which is so strong and very accurate. In the numerical simulation, Normalized Variable Diagram (NVD) scheme is applied in the boundedness criteria. In the optimization process, lift to drag ratio (L/D) is considered as objective function and static conditions and shape parameters are noticeable to be considered as design variables; because the main factor in the design of WIG vehicles is related to moving near the ground and the distance to the ground draws attention to the significance of it. Therefore, the static conditions strenuously defend this view that they are irrefutable parameters in the aerodynamic optimization of WIG vehicles. Adaptive Neuro-Fuzzy Interface System (ANFIS) is employed to generate the surface response, because the objective function and constraints are so noisy. Sensitivity analysis is also done and the amount of sensitive of objective function from design variables is explored.

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