The core tube is the metal tube in the centre of the coil. Remove the plastic screw on the end, slide off the coil and there is the core tube. They usually screw into the main valve body or are clamped on with bolts.
You could use a rotary flow divider for accurate flow splits. I have never seen one for water, only oil but I can't see why they wouldn't make them for water.
Some sort of reduction gearing would make this a fairly simple job. You could then use a small electric motor which would probably be easier and cheaper than a hydraulic system.
What type of motor is that? It has a very low pressure rating and very high flow. A pump that produces that sort of flow will be quite a lot larger than what you actually require if you go up in pressure and down in flow.
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I want to learn as much as I can about marine propellors. I want to start with the maths side first and although all the basics are covered in general maths educational materials, I am looking for something more biased towards marine propulsion. Does anyone know a website with lots of diagrams...
