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post #65 of Old 04-09-2013
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Re: Modern Hull forms and Motion Comfort

Great thread and it's phenomenal to have Bob Perry ( a hero for many years ) on it. Still, have a question. Seems a given to assume ultra modern designs sail faster in more circumstances but is there a limit imposed by the design parameters as regards comfort motion. I see the light hulls, beamy aft hulls flying in semi displacement mode and wonder if a wave slaps against the usually unwetted portion of the aft canoe body ( except when running) will it produce a snap heave or corkscrew motion that many find most unpleasant. I also wonder about the sensitivity of the ultra modern hulls to the weight cruisers impose on their vessels. To what extent does the skipper need to attend to "trimming ship" when loading and is there a risk that overloading with stores or that 300' chain rode will screw the whole thing up. Lastly even when operated within design displacement ( with weight central/aft and low)given the semi planning behavior, decreased wetted surface with the boat on the water instead of in it -are these designs evolving to approximate the ride of a cigarette boat with a testosterone drunk driver.

s/v Hippocampus
Outbound 46

Last edited by outbound; 04-09-2013 at 05:51 PM.
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