Electrical spin rig for projectile wind tunnel testing

摘要

A spin rig for spinning wind tunnel models has a support mountable on a sting, bearings for mounting the model on the support and an electric motor mounted on the support, inside the model. The motor has a stator fixed to the support and a rotor that is connected to the model. With a D.C. motor of high coercive force permanent magnet stator, the spin rig can be accommodated within a model small enough to be used in small wind tunnels. Tests can be run at constant, controlled spin. Model development costs are significantly reduced.