Abstract: On the basis of the canard configuration a contour stealthy design including chiefly the wing, the fuselage and their connection type is projected. A prime project of a blended wing body vehicle with canard is provided, and through the change of the fuselage head form and the different fin disposals, the RCS are optimized. The average value of RCS and the value of RCS in the ±45°front sector for different designs are illustrated. The model measurement proved that the project having a sharp head fuselage and 30°double fin has the minimum value of RCS. The wind tunnel test to the model with RCS optimized proved that the vehicle project has excellent aerodynamic characteristics such as high lift curve slope, up to 26° stalling angle, high lift/drag ratio equal to 8, etc.

Key words: aircraft design, radar cross sections, microwave sounding, wind tunnel tests