T-Pain Is On A Boat: [Electric Boats] Re: Homemade electric auxillary?

Sunday, June 7, 2009

[Electric Boats] Re: Homemade electric auxillary?

--- In electricboats@yahoogroups.com, Matthew Geier <matthew@...> wrote:
>
> johnwaddick wrote:
> > So I rigged up an old $5 10" 12v car fan and immersed it in the pool for two hours. It worked fine, with good revs but not a huge amount of torque. Then I waited week to see if internal corrosion would ruin it and ran it again. It ran perfectly again for another three hours.
> >
> I don't imagine it would have been so happy if it had been in salt
> water. I'd be worried about the water getting the bearings and washing
> the lubricant out.
> Salt water is also electrically conductive, so you would lose power to
> the water, even if it wasn't conductive enough to actually cause a short
> circuit failure.
>
I had make success homemade trolling motors, but before 4-5 year; I got 24V/~120W airplane dc motors ( from gasoline pump); I had make plastic housing and built cheap mechanical gasket; propeller was 5"/3 blade (Sevylor); layer make bigger with 24V /~180W dc motor, with Mercury 3 blade propeller (6 3/4"), but with this motor I had some problems, propeller is too big and must be reduce ( for dc motor speed) or I can find ~6"/2 blade propeller. maybe from old Evinrude; I had another problem and last year , don't use canoe, only one day, but this day was suddenly bad weather with big weave and wind;
Homemade trolling motor is reasonably only if you use 1 - 2 person canoe and want to make lighter motor then smaller standard 30Lb motor ( but stronger then "micro" Sevylor 12lb motor ), and of course 24V, using 4 light 6V/12Ah battery in a row, with voltage regulation, 18V/24V... see my picture about them..
..another solution is built Dc motor with lower petrol outboard part, but then must be stronger dc motor, maybe ~600W/24V dc from some small 3 wheel electric forklift ...