MB- I asked John(Mars) that very question and he indictcated it didn't matter except for the fan is designed for cvs rotation. I think there might be a fan available for for running cw.
--- In electricboats@yahoogroups.com, "mboucher99" <mboucher99@...> wrote:
>
> thanks, reino.
> this sounds like good news, but i'm not sure i understand.
> mine is a brushless Mar 48v. i intend to check with MARS on monday, but do people know if i can, without creating trouble for myself, call either direction - R or L, my 'forward'?
> thanks all.
> mb
>
> --- In electricboats@yahoogroups.com, redu <reino.urala@> wrote:
> >
> > mboucher
> > you are lucky. Mars motors with traditional brush systems can be
> > operated freely in both directions.
> > Instead these "pancake" type motors are tricky: You may adjust the
> > advance for both directions, but the unsymmetrical brushes may wear out
> > rapidly in reverse if large voltages and powers are needed.
> >
> > What is CW of pancakes: It is unfortunately exactly "the wrong
> > direction", if you take a noutboard motor rig and replace the gas engine!
> >
> > cheers,
> > reino urala
> >
> > On 11/06/2010 09:28 PM, mboucher99 wrote:
> > > Thanks for responding.
> > >
> > > It is belt-driven. We have a MARS 48v, with 2:1 pulley reduction with dual belts from the big pulley to the small pulley on the motor shaft.
> > >
> > > Unless the Sevcon PMAC is set up differently for forward vs. reverse, I don't see why the motor would care which way it's spinning. I just want to be sure i'm not going to damage anything.
> > >
> > > Michael
> > >
> > >
> > >
> > > --- In electricboats@yahoogroups.com, Bill Spires<spiresac@> wrote:
> > >
> > >> What is your set up? Is there a thrust bearing to consider or is the motor belt
> > >> driven to a shaft?
> > >>
> > >>
> > >>
> > >> ________________________________
> > >> From: mboucher99<mboucher99@>
> > >> To: electricboats@yahoogroups.com
> > >> Sent: Sat, November 6, 2010 9:54:38 AM
> > >> Subject: [Electric Boats] propeller direction
> > >>
> > >>
> > >> here's one for you all. i am about to upgrade our 2-blade, 12" dia x 5 (?) pitch
> > >> prop with a 12 x 13" or 14, as has been recommended by several of you. any other
> > >> thoughts? the boat is a 27' sloop. the current setup does fine in normal
> > >> conditions, but is weak in strong currents.
> > >>
> > >>
> > >> today's question: does it really matter with an electric motor whether i buy a R
> > >> or L direction prop? forward is currently a left-hand twist, but the setup runs
> > >> more smoothly and quietly spinning left. can't i simply reverse my switch and
> > >> have it be a left-hand setup, or are there other considerations - motor - PMAC
> > >> controller - that i am not considering.
> > >>
> > >> thanks! (again)
> > >>
> > >>
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> >
>
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