Abstract
A wind-tunnel system for spinning body has been proposed to measure aerodynamic forces acting on the body. In the proposed system, the body is suspended and rotated by electromagnets. The forces are measured from the control signal for suspension. Three-dimensional positioning and rotation of the body were achieved. However, due to the non-uniformity of the magnetic fields, the rotation around a horizontal axis suffered from drag torque caused by eddy current. In this paper, a self-spinning floating body with a function of adjusting the angle of the spinning axis is developed. The floator was suspended successfully with spinning around various axes.
