just a thought - you could have a solar panel and/ or windgenerator onboard the trimaran to top up the dinghy battery.
Chris S
--- In electricboats@
>
> We have a Torqueedo 801 as well, for our dingy motor. I have gotten somewhat
> around the limitation of the battery by building a LIFEPO4 battery pack. It
> is a 24v 40ah pack, weighs ~27lbs. It fits in a medium orange waterproof box
> I got at West Marine. We tested it for an hour last weekend, and will
> continue with testing today. My only hiccup is that the charger that
> ecitypower sent me, a 15a 24v one, has a bad fan so I cannot charge the
> pack, as the charger was getting too hot. They are sending me a replacement
> fan.
>
> I need to get a AH meter installed on it, so I can accurately judge the
> capacity used and left. So far, so good. Cost was less than a replacement
> battery from Torqueedo, but with 4x the range (hopefully).
>
> Chris
>
>
> On 9/5/09 8:04 PM, "ewdysar" <ewdysar@...
>
> >
> >
> >
> >
> > Rob,
> >
> > I have a Torqeedo 801 and it is almost as powerful driving my dinghy at full
> > throttle as my 2hp 2-stroke outboard. Unfortunately, full throttle will drain
> > the battery completely in about 20 minutes. To get 1 hour or operation, the
> > motor needs to be run at half throttle or less. This equates to about 3kts in
> > an inflatable, in still water, no headwind.
> >
> > I use this motor on my inflatable with my F-27 trimaran at the isthmus at
> > Catalina Island and I try to anchor as close to the dock as possible. At a
> > couple of hundred yards, I can get 4-5 round trips in a protected anchorage
> > over the course of a weekend, though I run slow whenever possible. I also
> > carry the small wall charger that comes with the motor and plug in any where I
> > can while I'm ashore.
> >
> > Realistically, a 2hp ICE outboard will cost less than 1/2 the price of a
> > Torqeedo, and run over 3 hours at full throttle on 1 gallon of gas. With a
> > gas engine, you won't have to worry about range or power.
> >
> > I bought the Torqeedo to be able to carry the motor folded in one of my float
> > compartments. Now that I own it, I have accepted the considerable limitations
> > of the system and have adjusted my usage to match the motor. It is the most
> > efficient answer available today in electric motors considering total
> > operating size and weight, but the cost is prohibitive. Normal trolling
> > motors with just one L/A battery are cheaper, but will weigh 3-4 times the
> > Torqeedo or an ICE equivalent.
> >
> > Given your description of your situation, I would probably choose the Yamaha.
> > I'm a big fan of electric, but trying to use electric under difficult
> > conditions will be an expensive experiment that could end up very
> > dissatisfying.
> >
> > Good luck,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@
> > , Rob Johnson <dopeydriver@
> >> >
> >> > I've checked out the torqeedo site , they look pretty good.
> >> > I have a mate whose boat isn't as far out as mine , and who is a very
> >> strong rower , and he has been stuck on his boat for half the day , waiting
> >> for the wind to die down enough to row ashore .
> >> > How would the torqeedo handle those sort of conditions ?.
> >> > Regards Rob J.
> >> >
> >> > --- On Sat, 5/9/09, dennis wolfe <dwolfe@> wrote:
> >> >
> >> > ----- Original Message -----
> >> > From: dopeydriver
> >> > To: electricboats@
> >> <mailto:electricboa
> >> > Sent: Friday, September 04, 2009 5:53 PM
> >> > Subject: [Electric Boats] electric drive for a pram tender
> >> >
> >> >
> >> > I have a little 6ft 6 inch tender that I need to motorize.
> >> > I've checked my options , it seems it gets down to a 2 hp 9.8 kg Yamaha..
> >> > I checked out a Minn Kota , but the battery weight was just prohibitive .
> >> > Its use will be to get me and/or passengers and gear out to my yacht on a
> >> swing mooring , often working in to strong headwinds.
> >> > I spoke to the appropriate salesman in a very reputable company , and he
> >> explained that the problem lies when I need to do more than one trip , out
> >> and back.
> >> > And then on return , out and back.
> >> > The Yamaha could do it on its little tank full , or a spare litre of
> >> juice , but the Minn Kota ?.
> >> > I haven't made any decisions yet . I'd prefer not to go to an IC engine ,
> >> but I can't see how I can get around it , without going to a very expensive
> >> battery.
> >> > And when I do get to go sailing , I'll not be leaving the engine on the
> >> tender , it will have to come on board the yacht.
> >> > Any practical suggestions ?.
> >> > I'm in Sth Australia.
> >> > Rob J.
> >
> >
> >
> >
> >>
>
>
>
> [Non-text portions of this message have been removed]
>
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