Myles,
Thanks, that follows since its not otherwise shown. Forgetting as I did that emotor torque is very linear, not folded over like ICE's. Inch lbs...hmmmm
~ pete
--- In electricboats@yahoogroups.com, "Myles Twete" <matwete@...> wrote:
>
> It's "TORQUE": Units: "inch-lbs"
>
> You can deduce this by noting that Torque is not noted anywhere else and
> knowing that for a permanent magnet motor Torque and Current are
> proportional----i.e. "AMPS" is shown on the graph as a straight line
> confirming that the horizontal axis is Torque. And given the power range
> and knowing the ratings for similar motors (e.g. the ETEK PM brush motor),
> the units of that axis are most likely Inch-Lbs…that can be proven by doing
> some data regression from the plots.
>
>
>
> In case this helps-
>
>
>
> -Myles
>
>
>
> From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
> On Behalf Of Peter
> Sent: Sunday, February 06, 2011 5:23 AM
> To: electricboats@yahoogroups.com
> Subject: [Electric Boats] Re: Electric boating association in the US?
>
>
>
>
>
> Mike,
> Thanks, I have previously seen your blog and even borrowed a picture you
> show of the belt drive to carry on a conversation in another group. Thanks
> for making your stuff available.
> I read you 5X5 on your comments about trip planning and maintaining good
> watch....the skipper-ly approach regardless of mode of propulsion. A couple
> extra knots boat speed won't make much difference after one gets on the
> wrong side, or lapses attention and ends up in a bind, and a non-starting
> diesel is a show stopper for sure.
> Maybe you or others in the Electricboats Yahoo group can help me with one
> known blindspot I have, when looking at a Mars performance plot, I can't
> tell what the bottom scale represents. What am I missing, anyone?
> Look here: https://www.kellycontroller.com/mot/downloads/48VCW.pdf
> Thank you ~ pete
>
> --- In electricboats@yahoogroups.com
> <mailto:electricboats%40yahoogroups.com> , Mike <biankablog@> wrote:
> >
> > Pete:
> > Â
> > Thanks for the encouraging words to those of us who made the leap to EP.
> Yes, I agree you have to be ready to make the change. I know I thought about
> it for months before I decided to go electric. I went through a lot of "what
> if" scenerios before I bought a system. Happily, I have become very
> comfortable with the system and it's reliabilty with each passing season.
> >
> http://biankablog.blogspot.com/2010/12/end-of-season-thoughts-of-electric.ht
> ml
> > I know what it can and can't do and plan my trips accordingly. BTW I do
> sail around New York Harbor at least once or twice a season. Lot's of big
> ships, speeding ferries and tug/barge traffic. I never for a momentÂ
> thought my electric propulsion system could not get me out of the way any
> danger there.
> > I also found I can do things with my electric system that I would not do
> when I had my diesel. Plus it does it quietly and I don't hestitate to use
> it when needed. But, I agree you have to be ready to make the leap. But, I
> for one am so glad I did. I think when you are ready you'll be glad you did
> too.
> > Â
> > Capt. Mike
> > http://biankablog.blogspot.com
> > Â
> >
> > --- On Sat, 2/5/11, Peter <petemalone@> wrote:
> >
> >
> > From: Peter <petemalone@>
> > Subject: [Electric Boats] Re: Electric boating association in the US?
> > To: electricboats@yahoogroups.com <mailto:electricboats%40yahoogroups.com>
>
> > Date: Saturday, February 5, 2011, 5:03 PM
> >
> >
> > Â
> >
> >
> >
> > I've been on the list for awhile, trying to stay abreast, and realized Tom
> missed my (fourth) category, the folks who are interested in electric AND
> need little energy, but want high energy density, long storage time, long
> run time, hull speed, (all traffic avoidance driven concerns) and care about
> the environment (very much so, in a pragmatic way). But can't get all of the
> above with electric at a reasonable cost, so stick to diesel. No, not hybrid
> e-diesel, just straight oil burning.
> > If we had a cost effective way to recharge batteries without burning coal,
> I'd start calling electric a win.
> > But the important work of developing interest in the methods and
> materials, systems and grass roots efforts must continue so early adopters
> like yourselves open the way for improvements.
> > Thanks for all that you put into your projects and exploits with electric
> boating. The dedication you show is heart warming.
> > My next repower may put me at the cross-roads, but for now, i'm just
> another diesel auxiliary sailor, looking to survive in shipping traffic and
> occasional bad weather.
> > I enjoy reading the list, thank you for being here ~ pete
> >
> > --- In electricboats@yahoogroups.com
> <mailto:electricboats%40yahoogroups.com> , "Tom" <boat_works@> wrote:
> > >
> > >
> > >
> > > It seems to me that boaters interested in electric propulsion fall into
> three camps:
> > >
> > > There are boaters who are willing to accept the very limited range at
> high power levels (compared to ICEs) that is typical of electric boats, and
> they choose to operate their boats in manner that suits their available
> energy.
> > >
> > > Then there are the folks who are considering converting less suitable
> hulls, or have unreasonable expectations of performance. Let's hope we can
> help them understand the inherent compromises before they make decisions
> they might regret.
> > >
> > > And then there are those (who I expect are in the great majority at this
> time) who are intensive energy users, who wouldn't consider changing the way
> the use their boat, and realize that electric propulsion is not suited to
> their needs.
> > >
> > > -Tom
> > >
> >
>
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