When I look at solutions, my mind goes to finding a way to accomplish what I want to do, using parts that can be used in other applications.
Not knowing the size of the boat you plan, I will throw out a guess that you can handle around 300 pounds of batteries, consider a 2500 -5000 watt inverter that works on 12 or 24 volts and steps up to 120 volts, using a bridge rectifier you can find treadmill motors up to 2 and 3 HP and a 15-50 dollar router type speed control, you will need a reduction of around 3-5:1 which gives a final list of parts that can very quickly be removed and used in other places (if you are someone that likes to tinker).
The batteries you have to have in any case, the other parts depending on wattage can range from 300 dollars on up. The fact that they can be used in other things is what makes this look good to me.
Just my thoughts
Ron
--- In electricboats@
>
> saab4991 wrote:
> >
> >
> > I am a long time lurker desirous of building a small launch to use on
> > a very quiet local river. Two questions that haven't been answered by
> > the search facility:
> >
> > 1. Why wouldn't an auto starter motor provide a low tech solution for
> > short distance cruising?
> >
> > 2. Has anyone looked at the arduino micro-controller as an inexpensive
> > motor controller? The computer itself is around $20.00 and a diy motor
> > controller is (supposedly) available as a kit for $15. This would
> > control 36 volts and 8 amps.
> >
> > Thanks for the help
> >
> There are auto starters out there that are PM motors. The major problem
> with these are the short duty cycle.
>
> Don't know any thing about the Arduino controller and the H-bridge
> systems for most of these type units are well below the power level
> needed. We need specs to answer this question.
>
> Kevin
>
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