As the speed (knots) of a displacement hull approaches the square root of its' waterline length (feet) the slope of its' power consumption curve (speed/power) goes from horizontal to vertical. The first KW gave him 4+ knots; the second KW gave him less than one knot. To provide the luxury of that extra KW would require doubling his battery bank capacity and doubling the number of solar panels to keep the larger bank charged. The extra expense is not providing a very good return for the sake of less than a one knot gain. Thanks. Steve S.
--- In electricboats@yahoogroups.com, "Myles Twete" <matwete@...> wrote:
>
> "It is interesting to note that your average speed increased by less than
> one knot when increasing your power from 1000 watts to 2000 watts. Thanks.
> Steve S."
>
>
>
> Actually, that's consistent with what a lot of us have experienced: it takes
> a doubling of power to increase speed by 1knot.
>
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