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If you really want to learn then read Marchajs book or Frank Bethwaite book or the writings of Arvel Gentry. These writers have gotten it right on max hull speed and jib slot effect.
Wouter


Wouter it cracks me up when you get fired up but it appears youve thrown some good info my way, so before I accept all this writings of Arvel for gospell are there any of his conclusions to be wary of. ( Sorry to be off topic )
thanks in advance

Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576