blade samples (Fig. 2a). The samples are rectangular beams. The Young modulus in the longitudinal direction Elong and transverse direction Etrans are determined from the measurement of the deflection caused by a force P applied at the center of a sample beam simply supported at its two ends. The shear modulus Gxz and Gyz are determined from the measurement of the rotation D caused by a torsion moment Mt (=F.c) applied at the free extremity of a clamped beam of length L (Fig. 2b). The results of these characterization tests are given in Table 1, these values may be slightly different with some other wood samples. For the wood samples only Gyz was characterized.