Abstract
Computing flows around an object with large deformation is important and interesting. In this study, to calculate such flows in a short time without crushing computational elements, we proposed new approach called 'biaxial sliding mesh approach', which has multi sliding planes. Furthermore, this approach was applied to flows around the tilt rotor aircraft which has advantages of both of a helicopter and a fixed wing aircraft by tilt rotors. After checking the approach on simple test problems, a flight what it takes off and changes from helicopter mode to airplane mode was simulated.