It is impoertant to make the distinction between vee belts and cogged belts. The latter are a significant improvement over other belts and even gear boxes, to me. Belts will work when submerged and don't need their oil checked or changed. Of all the cogged belts, I find Goodyear Eagle GT herringbone belts the best. They transmit more power, are more compact, and quieter than other cogged belts.
--- In electricboats@yahoogroups.com, "luv2bsailin" <luv2bsailin@...> wrote:
>
> I concur with Miles.
> Belt drive technology has come a long way in recent decades too. For instance look at the main drive belt on a Harley. When I sold my last one at 50,000 miles the belt showed very little wear, and my current bike is on it's second belt at over 100K.
> Also, having a reduction drive allows you optimise the setup for your particular hull/prop/battery combination.
> Brushless motors have some advantages (generally quieter and slightly more efficient) but the controllers are more complicated and expensive. Whatever way you go, a well engineered system will go many years with almost zero maintenance.
> Jim
>
> --- In electricboats@yahoogroups.com, "Myles Twete" <matwete@> wrote:
> >
> > Brush and belt replacement hassles are overrated: I've been running now with
> > the same brushes since 2002 or so. It'll likely last another 6 or 8 years
> > before needing the 2nd or 3 sets I have.
> >
> > Re. 12v: 36-12v DC-DC converter---not expensive yet efficient---good for
> > 300watts or so in my case.
> >
> >
> >
> >
> >
> > From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
> > On Behalf Of gstranne
> > Sent: Wednesday, October 13, 2010 12:26 PM
> > To: electricboats@yahoogroups.com
> > Subject: [Electric Boats] Electric drive units
> >
> >
> >
> >
> >
> > Hi members,
> > I am new to this group and intereseted in your experiences with electric
> > drives for sail boats. There are several suppliers capable of providing
> > complete inboard packages for up to 48VDC or even up to 72V.
> >
> > I have checked SolidNav, Electric Yacht, Advanced Marine, Propulsion Marine
> > and ASMO.
> >
> > I would prefer a "maintenence free" system, i.e no brushes or belts to
> > replace. Please correct me if I am wrong but it seems that Advanced Marine
> > can offer that. Has anyone used such a system?
> >
> > How did you solve the need for 12VDC for the rest of the boat?
> > Did you tap that circuitry into one of the series connected 12V drive
> > batteries?
> >
> > Any comments to this would be appreciated?
> >
> > Gunnar
> >
>
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