Rim-Driven Permanent Magnet Motor Propulsor (RDP)
A new type of drive developed by General Dynamics Electric Boat of Groton, USA. This drive is more compact and has several features that differ significantly from other pods available today. The motor of the conventional pods is encased within a pod (hence the name) on the same shaft as the propeller. The concept of the RDP is entirely different. Basically it consists of a propeller rotating within a nozzle, which has an integrated downstream stator. The rotor shaft and bearing system are supported in the stator hub. The electric motor is integrated onto the rotor rim and the entire motor is embedded in the nozzle. The nozzle is attached via struts to the slewing bearing in the hull.