Prop for ac eletrical motor -different application

[Theplum]

Hey Guys,

Been browsing your forum here and have learnt quite a bit. My application is a bit different, where I am using a motor to push water in a fish tank, using props/parts that you guys uuse in the rc world. Since I am trying to match up a RC prop to my motor, I was hoping you might be able to lend a hand.

I have been quite successful so far, though am attempting to fine tune my project, which is where I have hit a stumbling block.

1. I am unsure if I can find te RPM of my motor, without a tachometer (if not, I will just order one). I Believe the one number I am missing is if the motor is one pole, two pole, etc.

2. With the rpm of the motor, i am not sure how I co-relate my plugged in motor to your battery powered motors.

The motor is your typical pond motor, where a sealed magnet turns and spins a prop which is on a magnet shaft. It consumed approx 120 watts/hour, 60 hertz.

Thank you for any help you can lend.