Hi Carlos,
For me buying an engineered unit was worth the money. I'm sure it would have taken quite a while to fabricate a unit. I've done enough projects to know that there will almost always be mistakes made that will cost money and time.
That said I like building stuff and got my tinkering fix figuring out where and how to mount batteries, wiring everything together, experimenting with props...
Here is a link (I have no connection)to a great price on a SolidNav Explorer; http://shop.ebay.com/i.html?_nkw=solidnav&_dmd=1&_rdc=1
Mark
Santa Cruz
--- In electricboats@yahoogroups.com, "Carlos Silva" <pahuac@...> wrote:
>
> Hi. I am resuming my conversion plans and question if building a system from scratch using as basis a Sevcon Brushless Sailboat Kit - 8.5KW (http://www.thunderstruck-ev.com/index.php?dispatch=products.view&product_id=55) instaead of the SolidNav unit is worth the hassle. Cost is about half, but you must add the heat sink, gear reduction system and holding rails. Your input is highly appreciated.
>
> --- In electricboats@yahoogroups.com, "acsarfkram" <acsarfkram@> wrote:
> >
> > Hi Glenn,
> >
> > I bought a factory built unit from SolidNav, the Explorer model. It has a Mars motor with a Sevcon controller. I think the gear ratio is 2 to 1 maybe a bit more than 2, you should be able to find that info on their web site.
> >
> > The prop I'm using is a fixed 3 blade 12x10. I would like to try a 12x11 or 12 some day as I think I would get a higher top speed. Currently I have a top speed in calm conditions of 5.7 knts. My concern is loosing the 4 knts at 20 amps, I would not sacrifice that for a higher top speed. But 4knts at 16 amps....:-)
> >
> > You can see some photos in the photo section here under "Lotus Flower".
> >
> > I've been running my system non stop since May of 2008 and am very pleased. Good luck with your research and possible repower.
> >
> > Mark
> > Santa Cruz
> >
> > --- In electricboats@yahoogroups.com, "Glenn Dennis" <vega1184@> wrote:
> > >
> > > Mark
> > >
> > > What motor and controller do you have? Did you get it as a kit or build it your self? What gear ratio and prop are you running? Sorry for all the questions but I am trying to figure this out.
> > >
> > > Glenn
> > >
> > >
> > > --- In electricboats@yahoogroups.com, "acsarfkram" <acsarfkram@> wrote:
> > > >
> > > > Hi Glenn,
> > > >
> > > > With my Ericson 27, (7000lbs before batteries) I have motored for 7 hrs at a draw of 20 amps. At that point I was using a small 2 blade prop that gave me 3 knts at that current draw. I now have a fixed 3 blade that gives me 4 knts at 20 amps.
> > > >
> > > > During that trip I used only one of the two 48 volt 100 amp hr banks that I have. I do not know how deep I discharged that bank because I didn't have a monitor at that point. It was probably deeper than you should discharge but I did have power at that point.
> > > >
> > > > I understand the theory dictates lower run times but I would be interested in what people are getting in real life.
> > > >
> > > > Mark
> > > > Santa Cruz
> > > >
> > > > --- In electricboats@yahoogroups.com, "Eric" <ewdysar@> wrote:
> > > > >>
> > >
> >
>
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