The boat uses a Kelly 12V-24V controller See the Data Sheet in files for specs under "Piwakawaka." I programmed it not to exceed the motor's amp limit. Started with an Endura 30, but found the Endura 40 (for $30 or so more) had an appreciably better punch through tides. I only use the boat locally in protected salt, tidal areas. These are not salt motors, but I haven't had any problems, and the motors are the cheapest part of the set-up if I ever do have a problem. They are inexpensive and about an hour of work to replace.
Dennis Wolfe had a long blog two or three years ago when he tested out a similar arrangement with, as I recall, a scooter controller for a sailboat he was building. Interesting reading.
--- In electricboats@yahoogroups.com, "stmbtwle" <stmbtwle@...> wrote:
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> I wasn't aware you could run a 12v Minn Kota on 24v... Good idea, I'll have to look into that. What kind of controller did you use?
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> Willie
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> --- In electricboats@yahoogroups.com, "gregory_west2001" <gwest@> wrote:
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> > I just posted in files a couple of pictures and a data sheet on our electric launch that we had built a couple of years ago using modified plans of a hobby steam boat. It is powered by a 12 volt Minn Kota running on 24 volts to get better prop speed at lower amps, as Dennis has described in his blog on the sailboat he powered with a Minn Kota. We haven't put on a flange yet to the motor post because we have about seven hours at hull speed on the little boat (to get down to a 30% charge according to the charge computer) and that is too long as it is for my wife and me to sit in that boat together with nearly no noise except the water and our conversaion. The batteries and all electrics are in a center seat about where the boiler is shown on the drawing, at the designer's suggestion. Under the bulkhead below the tiller are the only two controls: a pot for the speed and a push-pull switch for forward-reverse. The key switch, depth finder, and battery computer are under the seat facing aft so the person stearing can see them. Sorry to hijack this post, but I did find the inexpensivee Minn Kota, with a better prop and a controller, to work well on our small boat. (We just cut the wires leading to the resistors and used only the main leads.) Of course, our hull speed is nothing to brag about, but then again we aren't really using the boat to go anywhere.
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