A program for the sizing and performance analysis is developed for Canard Rotor/Wing (CRW) aircraft which operates in both fixed wing and rotary wing modes. The system characteristics, such as reaction driven rotor system, are analyzed first and then the system design process is defined. The developed program is verified for both fixed wing and rotary wing modes with existing aircraft data and the design optimization process is performed for a reconnaissance mission. For the CRW aircraft optimization for both fixed wing and rotary wing modes, a multi-objective function is constructed using weighting factors. For several design cases with different weighting factors and several design constraints, the optimization analysis is performed and improved results are derived.