Robin
Well-known member
In my view, there's no meaningful relationship between weight and strength. A better measure of strength is required if comparisons are to be made.
WRT performance. Low freeboard long keelers are only faster than AWB's upwind in a blow. Off the wind the AWB still wins by a country mile. So is it a good idea to have a boat optimized for upwind sailing in a blow at the expense of everything else? I know what my answer is.
Our 1988 Jeanneau hull, like many in their range then, was laid up throughout with a layer of Kevlar for stiffness and strength. By comparison some Co32s for example suffered stress cracking and had to have additional stiffening added in the forward areas to prevent the hull flexing over a bulkhead and causing this, later ones were modified. Thick and heavy was used in the absence back then of design engineering knowledge with the new grp material.
Slamming is caused by three things mainly, the hull shape forwards, boatspeed and pointing angle upwind. Older designs had deeper forefoots (forefeet??) newer ones have shallower and flatter ones, but it is worth noting that this is true of most modern designs not just so called AWBs. Speed is certainly a factor, slow down to old style pace upwind or bear away to their upwind best angle and a lot of slamming will vanish!
I disagree in the generalisation that a long keeler will beat an AWB upwind in a blow because not all AWBs are the same, as indeed nor are all older designs the same. Some AWBs will be more performance orientated and some traditional designs may see a beam reach as 'going upwind' in a blow. Better to compare individual designs rather than general categories.