Thank you for the suggestion. I have always liked slipper launches and fan-tail launches and had considered a small, lightweight boat along these lines.
What is the logic behind fairing the motor shaft and using an aeroplane propeller: is this instead of using the standard propeller and, if so, why?
As to length of time between charges and speeds, the limit on the Thames is "a brisk walking pace" and I would be using it for day trips, so maybe four or fives hours use.
Regards,
James.
--- In electricboats@yahoogroups.com, "dennis wolfe" <dwolfe@...> wrote:
>
> A half horsepower, 400 watts, 33 amps on a 12v motor, 17 amps on a 24v motor will push a 14' boat shaped like a wide canoe 4 -5 mph.
>
> The batteries are usually the constraint. How long and how fast do expect to go between recharges?
>
> You can buy a trolling motor for less than the parts cost to set up a do-it-yourself system. Build a fairing for the round motor shaft and use an RC model airplane prop and you will be surprised how well that will work.
>
> Denny
>
> ----- Original Message -----
> From: JamesA
> To: electricboats@yahoogroups.com
> Sent: Thursday, August 19, 2010 3:51 AM
> Subject: [Electric Boats] Choice of Motors
>
>
>
> I am sure that these questions have been asked before, so please forgive me asking again.
>
> I am considering building a small electric boat, no longer than 14', for use on the non-tidal parts of the Thames. I have two 12v motors from old self-propelled cylinder mowers, Atco, I think. Are these likely to be powerful enough to drive the boat if linked to an small outboard leg? The other alternatives I have considered are the scooter motors that are readiliy available on e-bay
>
> http://cgi.ebay.co.uk/Electric-24-volt-120-wt-motor-electric-E-Scooters-/390226951728?pt=UK_Sporting_Goods_Scooters_LE
>
> or
>
> http://cgi.ebay.co.uk/350W-Electric-Motor-Electric-Bike-Scooter-2550RPM-24V-/170523906850?pt=UK_CartsParts_Vehicles_ATVQuad_Trike_Parts_Accessories_SM
>
> Any suggestions would be appreciated.
>
> Regards,
>
> James.
>
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