[highnrise]

I am trying to calculate a needed power to rotate a basic propeller system.The visualizaiton of the system is. There is an electric motor powering the sytem linked to a Gearbox to increase torque. Output of the gearbox is conencted to propeller via shaft. Propeller is in the pool of known fluid. To find the power i am checking all kinds of systems like submarines, planes, viscometers and etc... but i still have a lot of questions about it. You may suggest analitical or numerical solutions. I am asking you to give me a heads up to a solution path. If something does not make sense about the question just tell me and i will write more openly.