Propeller Design/Selection Help


#1

Hi,

I’m in the process of designing a thruster system and I’ve gotten to the point I need to figure out the propeller. I’m feeling a bit lost looking at the (difficult - for me - to understand) prop design tools out there. Could use a little expert help if someone with greater understanding could lend a hand.

I’m looking to buy or cast a propeller that’s 10" in diameter. It will be shrouded in a Kort nozzle, and powered by a motor in the 300-500 Watt range. The application is a home-built dive scooter, so very similar to an ROV thruster.

I’m looking to maximize thrust around an optimal forward velocity of about 2-3kts.

The challenge at this point is to:

  1. Select or design a propeller. (I’m casting numerous parts for this project in aluminum so I’m more than fine building the ideal prop if I can to a CAD model of the correct geometry.

  2. Determine appropriate gearing to optimize RPM for the selected propeller for this application.

Any “pointing in the right direction” would be hugely appreciated.

Thanks,
-Ben