[PCW] cs hull semi-displacement?

[mrchuckjohnson at aol.com]

I have the impression that the CS hull is a full displacement hull and
does not plane. Do I stand to be corrected?


-----Original Message-----
From: Pat Reischmann <preischmann at msn.com>
To: power-catamaran <power-catamaran at lists.samurai.com>
Sent: Fri, 7 Sep 2007 6:03 am
Subject: [PCW] cs hull



I couldn't agree with Malcolm more, the inherent fuel efficiency and
particularly the prop protection are high priorities. As far as I am concerned
one of the big advantages to going catamaran is you DO have the possibility of
true prop and shaft protection. We have had customers hit the bottom at 15
knots with no damage other than bottom paint scraped off. I think hull
fineness has a lot to do with what speed you are looking to be most efficient
at. Clearly with a longer waterline at our current beam on the Manta we would
be more efficient in the pre-planning range of 9-12 knots. The Manta has an
11:1 ratio currently. The only other variable I see is how to shape the bridge
deck. I think most designs would benefit from more clearance than they have,
but you are fighting interior head room and dock appeal. I like Pete Brady's
thoughts on vapor dampening with the multi chine underwing.
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