Sunday, July 18, 2010

Re: [Electric Boats] Keeping It Simple

 

John,
 
A good place to get these answers is at www.electricyacht.com.
 
John
 
 
 
On Sun, Jul 18, 2010 at 1:44 PM, John Green <v_2jgree@operamail.com> wrote:
 

Hi, I have been a member of this group for a few weeks now, but am not getting the level of info I need. Does anyone know where I can get less technical info than discussions of the merits of different battery types, and amps drawn and similar?
The type of info I want is answers to simpler questions such as the following:
1 Can I manage without a controller, and just switch a motor on or off the same as a vacuum cleaner or blender, maybe have a 6 volt supply available to give it a slower speed if needed?
2 If I use a solar panel to charge a 12volt battery, how do I prevent overcharging, or does it automatically never overcharge?
3 How do I set up a thrust bearing on the prop shaft?
4 Can I use multiple lower powered motors for inboard use, such as those used on electric bicycles?
5 What is the equivalent rate for HP of a gas outboard versus electric inboard - can I figure that I need 750 watts per HP, or does it not work like that, bearing in mind electric can be run overloaded?
6 Can I use, say, 3 Minn-kota type trolling motors of about 30 lb thrust to power a 26 foot sailboat, if so, how many minutes of running will I get assuming I have 3 separate 12 volt deep cycle batteries?

I hope that there is somewhere where the simpler things can be discussed of where there is an FAQ that I can use.
I have a 26 foot sailboat with a very old gas engine that I would like to dump rather than spend money on - I would prefer to spend it on a generator to charge the batteries. I have the sails for main power. But I don't know how to sail yet, and figure it will be safer with 'plan B' power available, such as gas or electric.
Any help appreciated,
Thanks,
John

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