I converted my previous boat, a C&C 33-1, from Atomic 4 to electric auxiliary propulsion.
It was a fun project. I learned a lot.
Hurricane Irma claimed that boat and I now have a Cal 31 with the original Universal diesel engine.
The engine runs great (unlike the A-4) and I have no plans to replace it.
When/if the engine eventually dies, I'm not sure what I'd do.
Electric was nice for day sailing - getting off and back onto the dock.
My plans are for coastal cruising so diesel is attractive.
To my old ears, the clackety clack of the Universal (sounds like it's running on two cylinders lol) is no more annoying than the whine of the gear reduction in the electric drive train.
Also, for motoring efficiency, electric calls for a bigger prop. The additional drag under sail can be negated by spinning the prop at the speed of the water column. That does not require a lot of energy - sort of an electric folding prop.
Just my 2 watts/volts/liters.
Bob M
Vixen
1979 Cal 31
Universal 5416 diesel
Jax, FL
On Wednesday, November 29, 2017, 3:08:32 PM EST, 'Jason (Electric Boats) Taylor' jt.yahoo@jtaylor.ca [electricboats] <electricboats@yahoogroups.com> wrote:
That's about right. Generally, people opt for a 2-hour pack. That is a 10kwh battery for a ~5kw propulsion system. That gives a good day-sailing or weekending performance envelope. Anything further and you are really looking into a serious method of recharging. Lots of solar panels, small genset, etc.
My boat (just outside Montreal) I have a 1-hour pack (5120wh) for my 5kw propulsion system. The bulk of my sailing is day outings, and racing. I store a 2000w inverter generator on shore for when I will head out for a little cruise. The generator can power the boat to 4kts without touching the battery.
If you're around Montreal next season, let me know. I love showing the boat as it gives me an excuse to go sailing.
Cheers,
On Nov 29, 2017, at 08:44, Phil Cook philcook@rogers.com [electricboats] <electricboats@yahoogroups.com> wrote:
Hi all
I'm new to the group and am looking at the feasibility of repowering a contessa 26 (that we are refitting) with electric.
I'm a little sceptical about the science and capabilities of electric. Weight and range seem to be of greatest issue. It seems that an hour or two at hull speed is about all one can expect from 6 batteries. 6 batteries seem to be quite a weight penalty and have substantial space and cost variables as well.
I'm interested in everyone's comments. Thoughts?
Phil Cook
MBA CET LEED AP
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