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The acceleration of the body is the derivative of the velocity, and thus, follows cosine curves as the velocity followed sine curves.
As for the position and velocity of the wing, the Y component of the wing acceleration follows the same general curve as the acceleration of the body. The X component was and the angular acceleration were obtained by numerically taking a deriving the deriving (was unable to get an analytical form that resulted in a graph consistent with the previous graphs) the X component of velocity and the angular velocity respectively.