[Public-List] hull speed

[John Riley]

Jeffrey wrote:
> Gordon,
>
> With respect, I don't think it is possible to power an A30 hull to 7-8
> knots. Hull Speed is somewhere around 6.2 knots. My 20hp can power the boat
> to just over 6 knots at max rpm, but the noise and fuel consumption is
> wicked. I've hit 7 knots and more for very brief periods of time under sail
> when hit with a gust, but never under power. These speeds clocked with GPS.
>
> -jeff
>
>   
If using a GPS to measure speed, you are not measuring speed through
water.  If you hit 7 knots on the GPS, it is very likely the water was
moving a half knot or a little better (or a lot better, perhaps).

Hull speed limits speed through the water...not speed over ground (if
the water is moving for any reason).

-- 
John S. Riley
S/V Gaelic Sea
1972 Alberg 30 #521


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