Chris_Robb
Well-Known Member
Noticeable that boats with rolled up headsails still on did not get away with it.
Lavrion Greece: violent squall with damages
- Thread starter Roberto
- Start date
Noticeable that boats with rolled up headsails still on did not get away with it.
vyv_cox
Well-Known Member
The Evros yard at Lakki will no longer lift a boat with a headsail still attached. This is mainly because of the risk of the boat falling when the sail is being dried ashore but it is also a welcome rule to minimise windage in big winds.
Artic Warrior
Well-Known Member
Just been talking to a yard owner up here 50 miles north of lavrion marina and
he thinks the problem was that the boats sit on the cradle and the keel is on the floor not on a beam that is
part of the cradle, and what happens is the cradle slides sideways and once the weight passes upright the weight of the boat will escalate the slide.
The wind apparently was slightly more here than at Lavrion,
The weight of the a boat on a middle beam would massively create a lever effect helping is stay in the cradle,
I made a cradle for my fin keeler once and made little ears on the middle beam so that the keel could no flip of it to one side.
Colin
he thinks the problem was that the boats sit on the cradle and the keel is on the floor not on a beam that is
part of the cradle, and what happens is the cradle slides sideways and once the weight passes upright the weight of the boat will escalate the slide.
The wind apparently was slightly more here than at Lavrion,
The weight of the a boat on a middle beam would massively create a lever effect helping is stay in the cradle,
I made a cradle for my fin keeler once and made little ears on the middle beam so that the keel could no flip of it to one side.
Colin
grumpygit
Well-Known Member
In Planaco on Aigina they use similar stands with the keel on the floor and then use a really heavy duty ratchet tightening webbing strap all around the stands to keep them a pulled in to the hull. Also the whole yard is concrete so no loose or uneven floor. They, to my knowledge have never had a problem with this system.
doug748
Well-Known Member
A very good point, I think.
In heavy winds I have seen boats starting to do this. The hulls seem to generate lift and you can observe the weight coming off the keel. I have a photo somewhere of my keel which has moved 4 inches, had it fallen off the timber that would have been that. I now stake it into the ground.
OldBawley
Well-Known Member
Newer yachts are light, very light. Big surfaces and very light construction, No surprise they move.
Ours is the contrary, 8 tons for 27 feet.
Last time I lifted the boat I looked for a yard where they lift traditionally, sledge, and I insisted the yacht would be lifted with all of the weight on the keel.
After a month of preparations to apply copper coat I started moving the blocks under the keel to do every part of the keel. The feet wide oak bearers supporting our 3,5 “ wide keel ware compressed more than an inch. Heavy, way to heavy to be lifted by windage on the hull.
Last summer we ware moored next to an almost similar yacht, a modern carbon replica of a classic. That yacht weighed 1,8 ton. Sailed a lot faster than our old fart. Even had a carbon bucket as a loo.
While applying the copper coat I had to remove the struts on the hull. I made 4 meter long legs connected to the rigging and fixed the masthead to boats standing 20 yards sideways of our yacht.
I was living on the boat and have a video of a water botlle moving over the bridge deck during a heavy wind. Scary.
Best of all for a boat is in the water.
Ours is the contrary, 8 tons for 27 feet.
Last time I lifted the boat I looked for a yard where they lift traditionally, sledge, and I insisted the yacht would be lifted with all of the weight on the keel.
After a month of preparations to apply copper coat I started moving the blocks under the keel to do every part of the keel. The feet wide oak bearers supporting our 3,5 “ wide keel ware compressed more than an inch. Heavy, way to heavy to be lifted by windage on the hull.
Last summer we ware moored next to an almost similar yacht, a modern carbon replica of a classic. That yacht weighed 1,8 ton. Sailed a lot faster than our old fart. Even had a carbon bucket as a loo.
While applying the copper coat I had to remove the struts on the hull. I made 4 meter long legs connected to the rigging and fixed the masthead to boats standing 20 yards sideways of our yacht.
I was living on the boat and have a video of a water botlle moving over the bridge deck during a heavy wind. Scary.
Best of all for a boat is in the water.
Artic Warrior
Well-Known Member
"Last time I lifted the boat I looked for a yard where they lift traditionally, sledge, and I insisted the yacht would be lifted with all of the weight on the keel"
Did you find a haul out that takes the weight on the keel,,,,ive only seen the type that has the bearers for the hull sits on ??? How would they let the boat down on the floor if it was keel lifting type ???
Did you find a haul out that takes the weight on the keel,,,,ive only seen the type that has the bearers for the hull sits on ??? How would they let the boat down on the floor if it was keel lifting type ???
OldBawley
Well-Known Member
The little yard usually hauls fishing boats and water taxi´s. Those boats have no weighted keels, are lifted by positioning wedges to the hull once the boat touches the sledge. Pulled on land, the weight of the boat is divided over keel and hull.
In my case the yard owner used the biggest sledge. Normally used for big Pur Seine fishing boats.
The two ski´s of the sledge are one meter high, half a meter wide, about 15 meter long. Build together with iron bars to the width they want. Sledge alone weighs 30 tons.
Ski´s mounted together so a man could work between them, then old railroad sleepers ware positioned over the gap. Boat was lifted with its keel on those sleepers.
Lifted about an inch, the final wedges are put in place against the hull to keep the boat from falling over. They take no weight, I made sure of that.
Lifted that way the underside of the keel was already more than a meter above the ground.
Excellent because I had to prepare the hull for applying copper coat.
Using only hand tools and my own solar powered sanding machine it took me a month of 14 h / day work to prepare the hull. Then half a month more to apply six coats of epoxy and four coats of copper coat. Crawling under that hull for a month, covered in dirt and soaked with sheep grease. This is how I looked after that month.
Artic Warrior
Well-Known Member
MMmmmm an interesting look,,,,
And your still married : )
And your still married : )