Category Archives: Current design
The Real Weight of Powerboats
There is currently a moderate amount of interest by both designers and consumers in lighter weight (displacement) powerboats. The sketch above is a 11,000 pound displacement 35′ boat. At this weight she can just manage a top speed of 12 knots (in flat water) with a single 60HP outboard, burning 6usg per hour,[.....]
The Typical Powerboat is Not Seaworthy
The typical production powerboat is far from seaworthy in even slightly adverse conditions. Above is a Cooper Prowler 42′ which is typical of boats intended to sell at boatshows because of impressive interior volume. These boats are huge inside for their length by being high off the water and beamy, both detrimental to[.....]
The Hybrid Myth, Greenline 33
More Hybrid Myth……
The Greenline 33 claims to be “Green”, claims to require far less fuel than typical cruisers, and claims to be especially efficient with their “patent pending” Super Displacement hull form. In truth it is none of these things.
What the Greenline hull appears to be is a reasonable answer to[.....]
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Fritzi Ann and the Stability of Fishboats