There has been some discussion on the builders group about Paradox's design, & one contributor said that Geoff Davis skipper of SMALL FRY had recommended the following article to help explain some of the theory behind his design.
Beam, Ballast & Displacement by M Kasten of Kasten Marine, Port Townsend.
From the web article I have snipped the following highlights:
"Widening the water plane (increasing beam) will increase stiffness, & reduce comfort & degrade seakindliness.
Adding ballast will make for more aggressive roll motion due to the added righting force. though adding ballast will reduce roll angle, there will be a less gentle "return" at the end of the roll, i.e. there will be a shorter roll period, roll accelerations will be greater, the roll motion will be less comfortable, and the incidence of seasickness will increase.
From research on Fastnet Disaster, those boats with heavier structure, lesser "ballast ratios" & heavier rigs resisted being "thrown" into severe rolling, had a much more seakindly roll motion, were easier on their rigging, did not lose their masts, did not capsize, & did not experience nearly the degree of sea sickness among their crews."
View full article @ www.kastenmarine. com
There was a further comment in the article about the benefit of distributing ballast as far from the centre pivot axis of the vessel. I understand Paradox has billets of lead distributed along its length fairly close to the bilge chine.
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