Sunday, September 7, 2014

[Electric Boats] Re:New Member and question about displacement/surface area

 

Lots of good info, thanks to both posts. 

No, I do not have a thru hull shaft, just the outboard and have been leaning that way.  Also the boat is rather flat bottom and room under the cockpit is rather limited.  I would most likely do the conversion of an existing outboard rather than buying one.  The brushless conversion packages look attractive although for the way I use the boat (mostly slow speed) a brush motor probably would give good results.

One concern is the available gear reduction in an existing outboard.  I am more interested in low speed operation, docking and getting out of the harbor, so it seems that a gearing of 2.5:1 to 3:1 might work better.  Also sizing the prop might be an issue with an outboard.

Battery weight is the big one for this boat.  How well would it work to have a moderate battery bank and use a generator when longer distances would be traveled.   Does an ac gen set powering the battery charger work to supplement the system current?

John
--
Flatwater Electronics
www.flatwaterfarm.com
"Neurosurgery for computer looms."

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Posted by: John Acord <jcacord@gmail.com>
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