T-Pain Is On A Boat: [Electric Boats] Re: Regeneration

Monday, June 15, 2009

[Electric Boats] Re: Regeneration

Thank you, your link "http://www.solomontechnologies.com/motorsailing.htm" is another excellent source of data. What's nice about these is that they are working examples rather than just theory. True, personal experience would also be useful, but its nice to know some of the performance bounds that people are actually getting. I'm currently putting a 72 volt system into my Hunter 37. The regen is important in that I may want to take advantage of it for extended cruses. I wonder if a good feedback system could limit its drag depending on current speed. At low speeds don't regen, only regen when at near hull speed.

--- In electricboats@yahoogroups.com, jp j <jp_br@...> wrote:
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> Hi all,
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> this not from experience but from collecting info on the subject.
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> Regen is possible, will probably need a good speed before to be usefull, say over 50-70% hull speed, will reduced speed probably over 10%. I would expect close to one knot loss at 7 knots.
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> check: http://www.solomontechnologies.com/Solomon%20new/Regenerative%20motor%20sailing.htmlhttp://www.solomontechnologies.com/motorsailing.htm
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> As windgenerator and their effect on speed, they would be a drag when beating where actually they would be more efficient (highest apparent wind), probably not much drag and good output when reaching and not very usefull downwind as appararent wind would be reduced (unless wind over say 20 kn).
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> They would never increase sailing speed.
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> check following article:
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> http://www.sailnet.com/collections/cruising/index.cfm?articleID=jeffre0017%20%20&coll_cat=Equipment&Coll_name=Cruising%20Equipment
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> Hope that helps,
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> JP
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