Thursday, September 3, 2020

Re: [electricboats] Supplementary electric power for heavy old sailing boat

[Edited Message Follows]

I was intending not to have to install any kind of clutch.  My thinking is that I could allow the diesel to drive the motor as a generator until the batteries were charged and then the motor would effectively go offload and freewheel and provide very little parasitic load (Im thinking of using a 48V Sevcon Gen-4 which supports regeneration). 

The Perkins 236 has ample power to drive the boat and the generator.  As it is, the diesel is driving a 170 amp Baldor alternator which I could probably remove and sell and replace with a standard 35amp alternator as it would be relegated to only charging the diesel starter batteries.

Orest, I was thinking of using something like the cogged belt that you suggest.  I'll look into the Goodyear option. Thanks.  I can see that by using a cogged belt the required tension is much less critical and so the side load on the bearings should be less.  I like the idea of mounting directly to the transmission.  I don't know if I have enough room for that.  I'll need to check.  I was thinking of glassing in a mounting pad directly to the hull and mounting the motor onto that via a hinge, similar to an alternator on an engine.

If you get a taker for the transmission case idea, I could be interested but my budget for the whole project is under US$5k so I imagine that would be out of my reach.






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