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post #20 of Old 10-21-2006
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Originally Posted by sailaway21
...I don't think we're talking about just a charging system on steroids here. If we cannot get serious power out of the diesel-gen. set then i believe we're wasting our time. Low power means contemplating matters such as batteries as ballast.
Because of the relatively low power density of batteries, any cruising hybrid vessel needs to be able to generate the cruising power from fossil fuels. The batteries are nice for close quarters, brief transits, and powering Surf's porno screen and various other devices thru an inverter.

Solomon Tech. has gotten some very interesting results for reduced fuel consumption with their regenerative propellor on ocean crossings while sailing and then riding down the waves in regen mode.
Originally Posted by sailaway21
High power has certain safety concerns with it as anyone who's seen a large gen-set overspeed and fly apart. The common thread contains, "lucky to be alive". AC offers a 3-5% improvement in efficiency over DC and would probably be "safer" than DC. One advantage, of course, is that one could seperate the power unit (diesel-generator) from the drive unit (motor) and that opens up a lot of possibilities.
Sailaway, the Lagoon hybrid uses a dozen 12vdc batteries producing 144 volts in series (Solomon Technologies). They are already leveraging the efficiencies of high voltage on the hybrid vessels. Nigel Calder's new Malo 45 combines the high voltage and a recently available high voltage power distribution system.

Originally Posted by sailaway21
...That is acceptable on a merchant ship, and maybe in a Toyota, but it should give pause in the somewhat porous structure of a small boat. Remember, your tax dollars are being spent to train rescue workers on what not to cut, with their jaws of life, on those Toyotas. The conduit those cables run in are painted int. orange for a reason!
That is a very real concern for me also, too !! I'm concerned when I ride in my friend's Toyota Prius. I also anticipate that we'll end up with a computer controlled power distribution system on the vessel that sometimes hides in fail safe mode and spits out a service code like my sputtering minivan does now.

-- neal

For my headstone:

If I'd only listened to those guys about that wing keel...
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