That is the awesomest electric ski boat in the universe. (That I've seen anyway.)
Excellent conversion!
From: "ams_ak@ymail.com" <ams_ak@ymail.com>
To: electricboats@yahoogroups.com
Sent: Thursday, August 23, 2012 5:16 AM
Subject: [Electric Boats] Re: Electric speedboat revisited
To: electricboats@yahoogroups.com
Sent: Thursday, August 23, 2012 5:16 AM
Subject: [Electric Boats] Re: Electric speedboat revisited
Update on the Electric Speedboat.
Waterski trials!
http://youtu.be/txEp3PwYSkg?hd=1
for more info you can send an email to info@newelectric.nl
regards,
AK
--- In electricboats@yahoogroups.com, "fneilss" <fneilss@...> wrote:
>
> Very interesting - thanks for the info.
>
> So by my estimate you get maybe 30-40 minutes at cruise out of your battery pack, to around an 80% DOD? Unless you have a pretty short commute, I assume you have to charge up with a pretty hefty rate charger for the return trip home?
>
> I suspect the Glastron is a fairly heavy boat? I've often wondered how a battery pack and motor such as yours would perform in a lightweight efficient runabout, such as Graham Byrnes' Ocracoke 20:
>
> http://www.bandbyachtdesigns.com/ocracoke.htm
>
> Your config would weigh several hundred pounds more than a 90hp motor and gas tank, so I guess it might be a bit too much on that boat. But I bet it would take a lot less juice to plane than the Glastron!
>
> I own a 20ft center cockpit runabout with 150hp motor that I would NOT buy again if I had to do it over (OK, the wife was the main reason for buying this boat - she likes a fast runabout for getting around the NC sounds). It gets 5 mpg which is better than most, but I hate burning that much fuel. I would build one of Graham's runabouts if I were doing it today, and seriously consider an electric installation. We typically don't run the boat more than 20 or 30 miles at a time, so the range of AK's type of config might just suffice.
>
> Neil
>
> --- In electricboats@yahoogroups.com, "ams_ak@" <ams_ak@> wrote:
> >
> > Hello Neil and all,
> >
> > some more data for the inquiring minds:
> >
> > The prop we are using is a 15 x 17 mounted on a Volvo Penta 270 sterndrive with 1:2.15 gear ratio. I do not know the real total weight of the boat, but we took out about 400kg and put 460kg back in. All mounted in a 1974 Glastron V174 Bayflite.
> >
> > Power consumption while getting up on plane is the peak draw, this is where our current limit settings kick in the most.
> > I limmit pack to 540A (6c) and motor 750A (the soliton can and will do 1000A)
> > Limmit pack low under load (sagvalue) to 2.4 * 90 = 216V, limit motor to 240V
> > Limit total output to 130kW, but have seen some higher numbers in the logfile
> >
> > with the current settings (both meanings) draw figures as they appear on the dash are:
> > 550A peak draw getting on plane. 350Aish for top speed (54kph) 130-140A to stay on plane and cruise. coming from displacement mode you can also build up to 120A-130A without getting on plane, so same current draw much lower speed.
> >
> > Hope you enjoy this data. Ill be interested as to any findings or further questions you might have.
> >
> > I do not check the Ymail, you can reach me at anne at newelectric.nl
> > our youtube channel now has a cool new vid of the powerboat pulling away as seen from shore:
> > http://youtu.be/Rvg_IA43b9k
> >
> >
> > regards,
> >
> > AK
> >
> > --- In electricboats@yahoogroups.com, "fneilss" <fneilss@> wrote:
> > >
> > > Yowsa! Kinda the opposite end of the spectrum from my long and lean at minimum watts approach to electric boating. I think I could tool along all summer with one charge of a 25kWh battery bank ;) (of course even with LiFePO4's it would sink my boat).
> > >
> > > With that big bank you can't go very long at 70+ kW draw/top speed. Have you measured the draw and knots at cruise? Never having planed a boat on electric power, I've always wondered what the current draw would be to keep a small electric speedboat on plane.
> > >
> > > What size is the prop? What does the boat displace?
> > >
> > > How far do you have to go to commute to work?
> > >
> > > Inquiring minds want to know!
> > >
> > > Thanks,
> > >
> > > Neil
> > >
> > >
> > >
> > > --- In electricboats@yahoogroups.com, "ams_ak@" <ams_ak@> wrote:
> > > >
> > > > Neil,
> > > >
> > > > Yes they are.
> > > > motor: Kostov 11" 250V 260A/duty cycle, we have 2 extra blowers for cooling
> > > > Controller: Evnetics Soliton1 = 300kW max output
> > > > Batts: 90 * 90AH Winston LiFePo4, we limit to 540A output (6C)
> > > >
> > > > We got all of the above from http://kostov-motors.com/tractionmotors/kostovevmotors(ac-dc)/seriesdcmotorsforelectricvehicles/k11250v/
> > > >
> > > > Great company, great service.
> > > >
> > > > AK
> > > >
> > > > --- In electricboats@yahoogroups.com, "fneilss" <fneilss@> wrote:
> > > > >
> > > > >
> > > > >
> > > > > --- In electricboats@yahoogroups.com, "ams_ak@" <ams_ak@> wrote:
> > > > > >
> > > > > >
> > > > > > Hello and thanks for the good cheer!
> > > > > >
> > > > > > a new vid up on Youtube that goes a small ways toward answering the questions.
> > > > > > http://youtu.be/jj3gg7A6BZ0
> > > > > >
> > > > >
> > > > > The text on Youtube says 240V - your audio says 300+ amps at one point - 70+ kilowatts??? Are those numbers right?
> > > > >
> > > > > Neil
> > > > >
> > > >
> > >
> >
>
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