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DSK
 
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Default Just a Reminder

"Capt" Rob wrote:
Joe has claimed his motorsailor has a hull speed of 13 knots and sails
at over 9. It's 43 LOA, which makes it not only faster than my 35s5,
but also faster than a J133!


A J-133 can go a lot faster than 9 or even 13 knots. Try
sailing one some time.

Joe claims to know something about boats. 13 knots, folks. Faster than
a Jeneau 54 or Beneteau 57, faster even than a Swan 57 or Saga 48!!!!

Wowee Zoweeee!



Charlie Morgan wrote:
Applying Froudes formula for hull speed, a 43 foot boat with a
displacement hull has a theoretical hull speed of about 8.79 knots.


That depends on the speed-length ratio, which of course
dependend on prismatic coefficient and length/beam ratio
among other things.

"Hull Speed" is not a carved-in-stone absolute figure.

DSK

 
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