Originally Posted by AusCan
I have no doubt that it may work well when clean, but I'm guessing it would foul up fairly quickly losing all of the efficiency gains, especially on a full displacement boat.
It could be protected with Propspeed or something similar, but since it isn't fast moving like a prop, it would still get a buildup and need regular cleaning.
The 2 year payback on investment, may apply to a large frieghter, but not most pleasure boats.
Agreed, moreover 10% saving on something eating 1 ton per hour is interesting, on 2 gal per hour, a bit less.