Hi i want to build an udnerwater turbine that senses waterflow at a specified time, and charges up a chargable battery when not bieing used for waterflow measuring. I went to a car wreck today to get a cheap radiotor fan for a car. The guy who works there told me that if i use the fan for underwater flow measurement, it will overload and it wont work, as the fan is electrical not mechinical. Can anyone tell me if this is correct and if it is then what is exactly happening for it to over load.
Also another thing, i need a motor to charge my battery, dont know much about motors, but what i want is a motor that charges a battery and also when not being used for charging(i.e no load), it could take relatively accurate measurement for water flow, so i need a motor that it easy to spin(small internal friction) yet capable of charging. any ideads of what type of motor i should use.
thanks.
Also another thing, i need a motor to charge my battery, dont know much about motors, but what i want is a motor that charges a battery and also when not being used for charging(i.e no load), it could take relatively accurate measurement for water flow, so i need a motor that it easy to spin(small internal friction) yet capable of charging. any ideads of what type of motor i should use.
thanks.