In this work a collaborative experimental study is conducted in order to assess the effect on the hydrodynamic performanceofacompliantcompositehydrofoilcontrolled by an imposed cavity pressure. It is expected that the cavity pressure together with composite structures is suitable to control the hydrodynamic forces as well as cavitation inception and development. A new concept of morphing hydrofoil is developed by the authors and tested in the cavitation tunnel at the French Naval Academy Research Institute. The experiments are based on the measurements of hydrodynamic forces and hydrofoil deformations under various conditions of cavity pressure. Effect on cavitation inception are shortly studied too. In parallel to this experiment, a 2D numerical tool is developed in order to help to design a compliant hydrofoil shape. Numerically, the fluid structure coupling is based on an iterative method under small perturbation hypothesis. The flow model is based on a panel method and a boundary layer formulation and it is coupled with a finite-element method for the structure. It is shown that pressure driven compliant composite structure is suitable to some extent to control the hydrodynamics forces, allowing to enlarge the operational domain of the compliant hydrofoil according to the angle of attack and the cavity pressure. Preliminary results on cavitation inception driven by compliant composite wall are pointed out as well.