Gear with Internal Propeller

This was an idea I thought of while working on a remotely operated submarine. It is intended to decrease drag and increase gear reduction efficiency. The gear is to be supported by two idler gears and then have a drive gear attached (the hole in the propeller gear was for testing, if you are in need of one with a slightly different design, feel free to change it, or ask my about it). This leaves no motor in the way of the airfoil created by the spinning of the propellers. If you have any questions let me know, and be sure to comment if you use this model in any projects you might have.