[Electric Boats] Re: Knots to Watts

 

This is the speed calculator I use.

For a cat, calculate for a single displacement hull. Then double the power requirement it spits out for the twin hull requirement.

http://www.psychosnail.com/boatspeedcalculator.aspx

John Casperson

--- In electricboats@yahoogroups.com, "David Elderton" <elderton@...> wrote:
>
> Here are my numbers for a Hobie 16 Catamaran, converted outboard with Mars ME0907, 2:1 gear ratio to Torqeedo cruise 4.0 prop. 48 Volt GB lithium pack. Weight as tested 800 lb. Measured with high current cycle analyst.
>
> 3 knots 223 watts
> 4 knots 396 watts
> 5 knots 660 watts
> 6 knots 1440 watts
> 10 knots 5000 watts
>
> Dave E
>

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