Abstract
In this paper, the airplane performs a 2-dimensional loop flight. The motion calculation and the fluid calculation are coupled for the investigation of the airplane motion due to the surrounding fluid. In the case of (non-coupled) motion calculation, existing data from experimental values and the steady fluid calculation around wing are used for the coefficients of the aerodynamics force. In the coupled calculation, the fluid calculation is performed for every step of the motion calculation. In the fluid calculation, the grid of wing model rotates corresponding to the pitching angle θ for every step of the fluid calculation. For loop flight, the pitching moment coefficient C_M is corrected by correction value decided by the pitch angle θ. Trajectories of the airplane by the motion calculation and the coupled calculation are compared.
