John, I personally want to see any data or stories you have. If you don't send it to the forum I would still like a copy: James@deny.org
Eric,
I share my own experiences of my own electric boat conversion and choose the content of what I write on this forum. I was going to publish my sea trials here but now I am not sure if that is a good idea.Please do not to be disrespectful.JohnOn Wed, Apr 20, 2011 at 6:49 PM, Eric <ewdysar@yahoo.com> wrote:
John,
There are big, heavy, expensive reasons that a fast electric boat won't go far. But you know this. You converted a power boat and used $4000 and 250 pounds of batteries to drive it. What was the top speed? What was cruising speed? What was the range at either speed?
The people that are asking about these conversions could use some honest real-world information about how well the concept works. The fact that you won't provide any specifics about performance tells me a lot about how the experiment turned out.
A power boat that cruises at 3 gallons per hour, is using about 33hp or more than 30kW for a 80% efficient driveline. To cruise at that speed for 1 hour would require a 100V x 400Ah battery bank. In Lithium, that translates to 1000 pounds and $17000. So it could be done, but why would anybody do it?
I've got a Warp9 motor and a 156V (300A continuous, 750A peak) controller sitting in my garage that could actually drive a good size power boat like I described. But I still can't figure out any good reason to bother. I've got these components slated for another car conversion, this time with Lithium instead of flooded cells like I had to 15 years ago.
Fair winds,
Eric> James,
>
> There is no reason an electric boat cannot go fast with the proper
> equipment.
>
> John
>
>> On Wed, Apr 20, 2011 at 12:41 PM, James Sizemore <james@...> wrote:> > sustain for as much as an hour....
>
> >
> >
> > You used the magic word there "expected" lots of boats of all types are
> > good candidates for conversion to electric, as long as the owner expect to
> > travel at displacement speeds.
> >
> >
> > On Apr 20, 2011, at 1:11 AM, Eric wrote:
> >
> >
> >
> > James,
> >
> > I knew that someone would bring that up, but I have to say that a canal
> > boat is not quite the same type of boat as "a 1980 288 Cruisers Yacht
> > VillaVee w/ Twin 454's". I don't think that many owners would spend much
> > money to swap out their 28kt top speed for a top speed of less than 10kts.
> > While I could build a conversion that would get a lot closer to the "normal"
> > cruise speed of 20kts, operating at those speeds would be difficult to
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
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