Thursday, November 5, 2009

Re: [Electric Boats] Emerging technology - hopefully lower cost

 

- - Kort Nozzles are comprised of special shaped propeller working inside a  circular "collar". Without the special propeller the Kort nozzle will not work and you will have a significant loss in efficiency and speed. You cannot use an ordinary propeller in a Kort system.
- - There was a movement in Florida to required outboard motors to have a Kort Nozzle system to minimize the impact damage to Manatees caused by "slicing" propeller blades. But it never got off the drawing boards as it was too expensive and not needed in other areas of the country. So the outboard motor companies said - No. and stayed with the ordinary propeller system.



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