A1Sailor
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What does "creased" mean?
What does "creased" mean?
I think you have answered your own question. Boats which don't leave home have no chance of hitting anything.The more they cruise, the greater the odds. The less you have to worry about it the more you let your guard down and the greater the odds, especially if doing so has no consequences. My boats have a far greater tendency to cruise, than stay at home, as boats you have to worry about do."I have NEVER said that EVERYONE should go cruising, only that anyone can. Again, you are putting words in my mouth, so you will have something to argue against.
You seem to be saying that NO ONE should."
I do not recognise anywhere i said that chap. I asked you a genuine question about the construction method which you partially answered. I do think though that maybe you or your boats are very accident prone. Even I haven't managed to hit a freighter yet despite being moored very close to some of the worlds largest in a confined area. How you or your clients manage that in the Med is quite a feat. Did the rock get a beating too? Little wonder you extol the virtues of a steel hulk if you use it as a battering ram so often. Do you have a row of oar holes each side and a guy with a drum beating the pace "ramming speed" Ben Hur eat your heart out, here comes an origami boat. All tongue in cheek chap, I am not expert sailor, and have had my share of problems on the learning curve.
As to the original question, there happens to be a steel liveaboard a few boats down from us, lovely thing. He spends a LOT of time painting, maintaining it. Same with the gorgeous wooden motor cruiser next to it. He is unlikely to strike a reef in the solent, especially as the boat never moves, so he would have had an easier time with a grp boat. I suppose if he was going roving the planet with no charts and radio for weather reports, hitting reefs and oil tankers all the time his boat would be ideal. :encouragement: In all seriousness I get your argument about a steel boat for certain uses as you describe. That is the nub of it I guess.
I still dont think the lack of sheer panels in your monocoques is a good structural idesa, but you have cited long term use and survival of your hulls in extremis, so taking your word for all that, then your boats are tough enough, it is just not the way many others would do it. Nothing wrong with that intrinsically, but for some of us it is not how we might go about it. Learning to agree to disagree is a life skill.
I think you have answered your own question. Boats which don't leave home have no chance of hitting anything.The more they cruise, the greater the odds. The less you have to worry about it the more you let your guard down and the greater the odds, especially if doing so has no consequences. My boats have a far greater tendency to cruise, than stay at home, as boats you have to worry about do.
The boat which it the freighter was in a pea soup fog. He said there was fog, and then there were fog balls, in which you couldn't see the bow .
Cruising the north coast, there were plenty of reports, daily, of uncharted rocks. An Alaskan in one of my boats hit several of them on his way north.
The suggestion that a boat should not be strong enough to survive such incidents, because they are not supposed to happen, is ludicrous.
Hold a piece of wood in your fingers , and hit it ,trying to break it. Now put it across two hard points and try again. Breaks far more easily.
You can hit a steel hull between frames and your sledge hammer will bounce off, without making a dent. Hit it much closer to a frame, and it will dent easily.
The boats in question would have been severely dented, had they had frames. They had no dents, Thanks to the ability of the plate to spring back, and not stretch against any hard points.
The boat which hit the barge was taking instructions from a guy with a brand new wooden boat.He immediately put a for sale sign on that one, and hired a friend to build him a steel boat.
I think you have answered your own question. Boats which don't leave home have no chance of hitting anything.The more they cruise, the greater the odds. The less you have to worry about it the more you let your guard down and the greater the odds, especially if doing so has no consequences. My boats have a far greater tendency to cruise, than stay at home, as boats you have to worry about do.
The boat which it the freighter was in a pea soup fog. He said there was fog, and then there were fog balls, in which you couldn't see the bow .
Cruising the north coast, there were plenty of reports, daily, of uncharted rocks. An Alaskan in one of my boats hit several of them on his way north.
The suggestion that a boat should not be strong enough to survive such incidents, because they are not supposed to happen, is ludicrous.
Hold a piece of wood in your fingers , and hit it ,trying to break it. Now put it across two hard points and try again. Breaks far more easily.
You can hit a steel hull between frames and your sledge hammer will bounce off, without making a dent. Hit it much closer to a frame, and it will dent easily.
The boats in question would have been severely dented, had they had frames. They had no dents, Thanks to the ability of the plate to spring back, and not stretch against any hard points.
The boat which hit the barge was taking instructions from a guy with a brand new wooden boat.He immediately put a for sale sign on that one, and hired a friend to build him a steel boat.
I use AIS and radar to avoid other shipping and land in dense fog. When sailing in rocky areas I tend to keep well offshore which gives me a better chance of avoiding uncharted rocks.
The " AIS and Radar are too expensive " wont wash. For serious sailing they are required kit.
There are still far more GRP sailing boats giving safe and reliable service than steel ones. The sailing public is not as gullible as you appear to believe. If the potential purchasers of new boats were of the same mind as you they would have nothing to buy. For many a home build is out of the question.
There is no volume manufacturer of steel sailing boats.
I wonder why?
One Swede tried mass producing origami aluminium boats.... He folded.
I have been working as a "professional "steel worker since my late teens, and started earning journeyman's wages when I was 21 years old. All the boats I have done have been "professionally done", by me. In my mid 20's European tradesmen twice my age , came to me for advice on how to do their job.
Monocoque describes origami boat building, a well proven technique.
Boatbuilding thinking often defies logic, and trying to sell boaters on logic can be extremely difficult. They would have to compete with the $millions which have been spent on promoting plastic. If $millions spent on promoting plastic didn't work, they wouldn't do it. Most people buy whatever gets the most promotion, regardless of its merits, or lack of them. Especially beginners.
I have seen many people trying to produce metal boats in the traditional way, go bankrupt, over and over again, all the while saying that I have it all wrong, but I'm still here, and they are not . I turned down 3 people last year, who wanted me to build them a boat. I'm retired.
When the BC ferry "Queen of the North" hit the rocks in Gunboat pass, a friend did the dive on her, and said she was only holed at the bulkheads and transverse frames. Had the frames not come in contact with the hull plate, she would have been creased the full length, without holing. Pollard, in his book, said riverboats avoid frames coming in contact with plate, to avoid rocks punching holes there..
Fraser Yachts told a friend that cracking of gel coat is more common where bulkheads meet the hull, and fewer bulkheads improves things, in that respect.
You can tell how much flexing a hull is doing , by the cracking of brittle filler used on the interior. Mine uses a paint and talc mix, quite brittle , which shows little sign of any cracking, after 34 years of full time cruising, including many ocean crossings. I have no full bulkheads. The partial bulkheads are bolted to tabs with 3/8th bolts in the edge of plywood. No sign of any movement there..
One of my 36 footers hit an uncharted rock at hull speed. It only stretched and dented the steel where the built in tank, ended in a transverse welded in end. Others hitting rocks where there was no such hard point , bounced off ,with no dents.
The first 36 I built, pounded for 16 days in big surf on the west coast of Baja, and was pulled off thru 12 ft surf, no damage. Another pounded across 300 yards of Fijian Coral reef, while leaving Suva, then was dragged back across the reef by a tug, in the same big surf. No serious damage. She later collided with a freighter in Gibraltar . No serious damage. Another did a single season passage thru the NW passage. No serious damage. Another was blown ashore in the Mozambique channel in a hurricane . No serious damage. One pounded on a coral reef in Panama for 4 months . No hull damage. One T-boned a steel barge at hull speed. No damage. With this kind of track record, questions about adequate structural strength are just plain silly.
How would your "Engineered "plastic boats have fared, in the above encounters? How have they done?
I have NEVER said that EVERYONE should go cruising, only that anyone can. Again, you are putting words in my mouth, so you will have something to argue against.
You seem to be saying that NO ONE should.
Sure, it's the way you tell 'em.![]()
One T-boned a steel barge at hull speed. No damage.
Your boats seem very accident prone.
I get the idea that frames can add stress to the hull shell where they meet.
But for a hull shell to be strong enough without support from frames, it will need to be a lot heavier.
A hull that flexes a lot and bounces off rocks is a concept that works well for a kevlar kayak, not sure how it scales up for a yacht.
We expect yacht hulls to last half a century, you have to start worrying about fatigue if anything is flexing.
The guy had no expeince with sloops.He was getting directions from someone equally inexperienced who said "Just sail along side and I can stop her." He forgot to ease the main,and was broad reaching directly at a wooden fishboat tied to the barge. Had to round up and T bone the barge to stop her. No damage whatsoever.
So you claim that a designer and builder is responsible for what all future owners do with their boats, and has absolute control over that?
You claim that plastic boat owners NEVER screw up? NEVER hit things?
Man, what a crock!
It was in front of Grama's pub in Gibsons.The pub was full of witnesses ,many of whom repeated the story to me, as well as the guy giving directions, who sold his woody to build a steel boat right after. A friend built his steel boat, which I have been aboard many times.You say they are all lying, and you are right?
Changing course 30 degrees doesnt slow a boat down much.