Do a google search for Dennis Wolf. He has a 25' electric powerer launch. There is a great spread on the net. The launch is called Harmony...It should be good reading for you.
From: barnabyrands <barnabyrands@
To: electricboats@
Sent: Sat, Jan 2, 2010 7:34 pm
Subject: [Electric Boats] New to the group, interested in converting 25ft launch from diesel to electric
I have a 7.6 metre timber launch that I've just finished restoring, and I have put a 26Kw diesel in it, which pushes the boat past hull speed comfortably. Unfortunately, its extremely noisy, and after spending three months redesigning and building a new engine enclosure, its still far too noisy.
So, I'm seriously considering selling the diesel and converting to an inboard electric system.
I have lots and lots of questions, and thought it might be useful to ask to be pointed in the direction of some posts / case studies of people with similar projects. Any suggestions and considerations would also be very welcome.
The details of the boat are:
7.6m LOA, approx 7m LWL
Max WL beam = 2m
Displacement = approx 3000kg
I estimate that 10 kilowatts is what the hull form needs to be driven to hull speed (hence a 26Kw engine running at 60% capacity at present)
The boat is currently sitting above its lines, so weight for batteries is not a concern - especially after the diesel is removed.
Very interested in any suggestions people may have for me.
Barney
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