>From the Australian agent for Torqeedo:
Yes, the Torqeedo is more noisy then other electric motors. But it is the price to pay for better efficiency.... The Torqeedo is an AC motor not a DC and the gearing is quite different then other motors. Realie it as notthing to do with commutation but you will always have people that know it all....
--- In harryproa@yahoogroups.com.au, Michael Gehl <mike@...> wrote:
>
> Motoring range *and* price... $3700US per motor plus ~$4K for 8KWh for a high-quality (a123 type, not the self-destructing Chinese) lithium battery pack plus probably at least $1K for decent electronics for charging, monitoring and control - then you need to find a marina that would let you "sneak-charge" the pack within the dock wiring limits. Which would give you about 1 hour of something near 2x9.9hp thrust.
>
> What's up with the noise level? I suspect a better commutation scheme might help there; it sounded well above that of conventional outboards.
>
> Mike
>
> On Nov 19, 2010, at 5:39 AM, Arto Hakkarainen wrote:
>
> >
> >
> > Electric motors would be handy on a proa if the motoring range issue can be solved. Weight of batteries and/or generator is probably an issue and the cost will be quite high.
> >
> > Arto
> >
> > --- On Fri, 11/19/10, Mike Crawford <mcrawf@...> wrote:
> >
> > From: Mike Crawford <mcrawf@...>
> > Subject: [harryproa] 45' cat with electric motor pods
> > To: harryproa@yahoogroups.com.au
> > Date: Friday, November 19, 2010, 6:44 AM
> >
> >
> > http://www.youtube.com/watch?v=mJv-lGPXxHc
> >
> > I'm not endorsing this setup because I don't know anything about it
> > other than what the video shows. Nonetheless, electric motors on
> > lifting pods have been discussed a few times on this forum, and I
> > thought these were interesting. My guess is that catamaran weighs
> > noticeably more than a Visionarry.
> >
> > - Mike
> >
> >
> >
> >
>