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The testing of scale model propulsors is an essential part of any marine propulsion design process. The fluctuating force module (FFM) is a self contained, instrumented propulsor drive system designed to be an integral part of a scaled propulsor test facility. The paper describes a novel electromagnetic test facility which provides a static axial thrust of 0-1 kN and triaxial dynamic forces of 0.3-3 Nrms, at frequencies of 80-800 Hz, to an equivalent propulsor mass rotating at speeds of 0-900 rpm, in order to calibrate the FFM force measurement systems.
Date of Publication: July 2004