Suggestions anyone? I have similar desires. I'm looking to buy, or create a home built saildrive with feathering prop or two bladed prop to hide behind the skeg. It must turn a large diameter prop slowly to achieve high efficiency. I am not interested in mounting a motor to an outboard bottom end with standard outboard prop. Those are meant to turn fast and reach planing speeds. Even Torqeedo is designed to plane. I'd consider a Torqeedo mounted on my rudder, BUT they are very expensive AND I have read too many complaints about reliability. I could choke down the expense if it bought decades of reliability. The only thing my search of this site has turned up is Glen-L's golf cart motor to an outboard lower unit.
An Aquamot pod drive mounted on my rudder would be perfect... Except there is that three bladed prop that does not feather and acts like a sea anchor. And there is nothing to indicate that dragging the prop through the water will cause the motor to become a generator to recharge the batteries. At least then one could alternately charge batteries and motor sail. Another response hints that there might be reliability issues as well.
Are you seriously thinking of mounting two of these on a big, presumably fast, cat??? I hope you are planning on running that diesel a lot so you can keep those props ticking over equal to the speed you would be sailing at were you not dragging those props through the water. Your boat is probably capable of cruising at 12 knots. At that speed I'll bet those props would produce the equivalent of 6 hp to 12 hp of drag.
Eric
--- In electricboats@yahoogroups.com, Peter Snowdon <petersnowdon@...> wrote:
>
> Yes. I was at the Vienna boat show yesterday and saw that "Aquamot"
> http://www.aquamot.at/ have a 10kW flange motor costing around 7000
> euros for a complete package and "Kraeutler" have a sort of saildrive of
> 8kW at 48v http://www.aquamot.at/
>
> Peter
>
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