Fig. 6. Attitude of two flight behaviors: (A,C,E,G,I) for forward flight; (B,D,F,H,J) for turning maneuvers. (A,B) The flight trajectory, velocity and acceleration. The position of the dragonfly is drawn at an interval of 1/955 s. The solid and dotted lines are with respect to the velocity v and acceleration a vectors, starting from the body position, denoted by crosses (the vector arrow is neglected). In forward flight, the maximum and minimum velocities are 1.71 m s^-1 and 1.22 m s^-1, and the maximum and minimum accelerations are 129.8 m s^-2 and 16.7 m s^-2; and in turning maneuvers, these are 2.01 m s^-1 and 1.26 m s^-1, 101.5 m s^-2 and 39.1 m s^-2, respectively. (C,D) Flight trajectories projected on the X, Y and Z axes. The filled circles, measured data. The curves are fitted by cubic regression functions as follows. For forward flight, and for turning maneuvers, where the time t is ms, and coordinates X, Y and Z in mm. (E,F) Attitude of the dragonfly expressed by orientation angles; filled square, filled circle and filled triangle denote roll, pitch and yaw, respectively. To calculate the angular velocity and acceleration, these raw data are also fitted using cubic regression functions, denoted by solid, broken and dotted lines for roll, pitch and yaw, respectively. For forward flight, and for turning maneuvers, where the time t is ms, and attitude angle is degrees. (G,H) Angular velocities; (I,J) angular accelerations.