I will be watching this thread with interest
I have a 1968 Hinckley 35 with a similar displacement to the
Choy Lee - albeit a tad longer.
I have always assumed that I would need both a big battery
bank and a relatively big genset.
Of course that is expensive on both counts (which is why I
have yet to make the jump).
But if this economy ever turns around, I will surely be
making the move.
Best of luck
Paul
Sailing Yacht Pyxis
1968 Hinckley Pilot 35
pyxisyacht@earthlin
_____
From: electricboats@
[mailto:electricboats@
aweekdaysailor
Sent: Friday, August 14, 2009 11:56 AM
To: electricboats@
Subject: [Electric Boats] Re: Greetings and introduction
Hi Eric,
Welcome. So... for "I would like enough thrust to power
against wind and heavy seas" you already know the trick
question - for how long? At max amps, my battery pack
(345AH) is good for an hour. Even with a genset, it takes
4KW to push the boat hard (same weight as yours), and 4KW of
charger/genset is pricey.
For a craft like yours I think you are correct that you'd
want to go higher voltage. Alternately, I've seen some
dual-motor setups - so a pair of brushed motors belted to
the same shaft - but I don't know if anyone is doing them
commercially. Sounds like you are handy though. That keeps
your amps down, parts cheap and offers some redundancy.
With lithium batteries, you could potentially pack at least
a couple of hours of runtime in, but at a steep initial
price.
Regards,
-Keith
--- In electricboats@
<mailto:electricboa
"Eric" <ewdysar@...
>
> Hi,
>
> I'm new to the group, but very familiar with electric car
conversions. I own two boats, a 1990 Farrier F-27 trimaran
and a 1964 Cheoy Lee Bermuda 30 ketch. The Cheoy Lee has
issues with it's Yanmar SVE12 single cylinder diesel motor
and I am trying to figure out a reasonable way to re-power
her with electric drive.
>
> 15 years ago, I built a few electric conversions, a
Pontiac Fiero, and 2 Porsche 914s. Looking at what is
available today, there really hasn't been any revolutionary
advances in drives, batteries or controllers since then.
>
> If I re-power with diesel, I'll probably go with a Yanmar
YM15.
>
> The Cheoy Lee is full keel with a transom hung rudder
(think Herreshoff H28) and weighs a little over 10,000 lbs.
The prop is in an aperture between the keel and the rudder.
I would like enough thrust to power against wind and heavy
seas.
>
> I know that more volts equals less amps, but it looks like
most marine systems are 48V. I'm OK with that if I can pull
enough thrust without cooking my batteries and running
cables bigger than my thumb.
>
> Anybody have some suggestions and results from this type
of conversion?
>
> Thanks in advance for your help.
> Eric
>
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