We know now, for example, that the only single factor that they’ve been able to show as to safety is length (LWL) Length at Waterline) Displacement has no bearing on that. Beam has very little bearing on that. But Length (Length at Waterline)(not Length Overall) (LOA). is the one single factor in all the studies of the disasters in the last few years that consistently shows up that the longer the waterline the better chance the boat has of surviving. (for instance, none of the boats capsized in the Fastnet Tragedy were 38 feet.

Or longer.all were under 38 feet) There was at one time a big truth that traditional sailboats were safer than the more modern designs that were out there not true anymore. There was a time when traditional sailboats were easier to handle than modern sailboats of that same time not true anymore. Things that have happened with leading edge race boats boats that were really pushed the limits of what they can do bad things happened. But these were boats that were built at the extreme ends of things normal cruising performance.

Sailboats today are not that way (unsafe). it just doesnt happen to normal (modern) cruising sailboats. And when it does happen theres very often a reason why it happens (mishaps at sea). And the reason is normally pretty extreme. Beneteau 40.7 that was lost out in the Atlantic this last year that thing had hit a reef at 6.5 knots it had not been repaired. It had been raced extremely hard and it made four (4) Atlantic crossings this is a lightweight race boat, essentially. All this stuff had happened and nobody had even checked to see.

If there was damage it had several things like sitting in a slip where it was hitting bottom at every low tide every power boat wake pounded on that keel. So collectively this was a pretty tired boat that somebody should have sent some time before they make a passage across the Atlantic and then they got clobbered out there in a storm. But then you go to the court of public opinion they go well here was this lightweight boat and it broke up this is what happens to modern boats. Thats the piece of the puzzle that.

People dont have (the bad condition of that particular boat). or like the conversation we starting to have about the weight of this boat versus that Ericsson I think both boats weigh about 10,500 pounds. but because this is a easily driven hull I dont have to carry as much sail area as that Ericsson I can carry less sail area and still move well. And it heavy air that becomes really important if you dont have alot of drag in heavy air your able to get by with less sail area that makes the boat easier to handle. If you have to.

Fight your way off a lee shore you have to fight your way out through waves an easily driven hull will go out through that much more easily and therefore be more easy on the crew. That ericsson was sailing on a 2122 foot waterline (LWL) I;m sailing on a 32 foot waterline (LWL)First of all, I dont have any pitching the motions much gentler that way. Im a little flatter bottomed so I do rock alittle more with the waves but I also dont get out of sequence with the waves so what happens with traditional round bottomed boats.

They tend to roll past the point that the wave changes shape much further and so theres a collision with that wave at the end of each and thats actually a rougher motion so compared to early lightweight boats where the motion was really pretty uncomfortable because of the shape of the hull as we understood more about what it took to design a lightweight boat and make it a more comfortable ride well the designers designed around that. In the wake of the Fastnet (tragedy) there was all kind of testing 1979 i think 13 people dies.

Off the coast of england 5 or 6 years later there was another disaster finally there was the SydneyHobart disaster and each of these race scenarios are studied in tremendous depth and alot of information has come out of that.we know now, for example, that the only single factor that they’ve been able to show as to safety is length (LWL) Length at Waterline) Displacement has no bearing on that. Beam has very little bearing on that. But Length (Length at Waterline)(not Length Overall) (LOA). is the one single factor in all the.

Episode 29 Best Cruising Sailboats

Sailing safety Jeff Halpern is one of those lifelong sailors who understands the dynamics of sailing and the boats we sail. I think what distinguishes him, besides for the fact that he tends to look at the science and technology of sailing in more detail than most, is that he has spent the time understanding the interaction of the various sciences and has also spent time trying to figure out how to explain complex scientific concepts to people who are not.

Necessarily science based or even interested in science. the reality of boats like that (heavy displacement in a relatively short waterline (LWL) is they are very high drag there is alot of resistance to those boats. And to get them to go through the water you have to carry alot of sail area. And when it comes time to fight a storm you still need enough sail area to keep going through that storm. A key element of good boat design is that’s its structurally sound and it can take the beating of that storm,.

And one thing about the westsails (for instance) is they’re pretty robust thats what alot of people are attracted to. And, there is no such thing as a boat that will get a unskilled skipper and crew through a storm. They aren’t inherently (these heavy and short LWL boats) stable for their weight. You wind up reefing those boats pretty early.it comes down to this range of issues about motion comfort, the longer the waterline the more the waterline is spread out, will result in a boat that is far more comfortable than trying to cram.

That into a short (like the westsails and other ‘short’ heavy boats) waterline length. In its design weight, its still gonna be rolly you deal with something that is round bottomed essentially a cylinder there is very little that can keep it from continuing to rock past the point that it should stop. The wave is already starting to change shape but the boat has so much momentum and so little hull shape to change that roll, that your trading rolling for a little slower motion. The court of public opinion has focused on this idea that ‘slow.

Rolling’ is better. and the reason is that when they first started doing lightweight boats the hull shapes were terrible.and these things would have jarring motion.that was really genuinely uncomfortable. but so was large roll angles.because you are constantly moving your body to deal with those large roll angles. There’s a whole thing about how ‘long’ keels track better but when you talk about small boats it’s not about how long the keel is that controls tracking what really controls tracking on a boat is how.



Boat Plans

Leave a Reply