Having witnessed an International 23 cat flipped by strong wind, I would be interested in your thoughts if a Seawind 24 could be flipped by wind alone with no sails up ?

Once the wind gets over 45 knots bare poles and freeboard of a hull result in significant heel in a mono hull. Add the wind getting under the trampoline to that and I would say yes although that's theory. Don't forget the sea state will be causing a lot of uneven rise and fall at 45 knots plus so lots of potential for the wind to get under and it's a light boat.

10 years or so ago a Snell 37, 4000kg was flipped at mooring in Kettering I think, it was thought it perhaps had swung across the bridle to slightly lift a hull in ~80 kn.
There was a video I can't find of a Lagoon 410 8000kg going over at anchor in the med in a micro squall!

www.facebook.com/reel/698446595469767?sfnsn=mo&mibextid=f1FQKn

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sparau said..
10 years or so ago a Snell 37, 4000kg was flipped at mooring in Kettering I think, it was thought it perhaps had swung across the bridle to slightly lift a hull in ~80 kn.
There was a video I can't find of a Lagoon 410 8000kg going over at anchor in the med in a micro squall!

In my fading memory, I was told by someone on the know, that the Snell dragged her mooring into deeper water where the weight of the mooring somehow contributed to her flipping.

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MAGNESIUM said..
Having witnessed an International 23 cat flipped by strong wind, I would be interested in your thoughts if a Seawind 24 could be flipped by wind alone with no sails up ?

I have been working on an International 23 and would be keen to hear the story of the conditions which flipped it!

Apologies for going a bit off-topic, but does anyone know where to get a floatation thingo for the mast? A friend of mine has acquired a high-performance tri. He hasn't got a heap of experience and I'd like to be able to suggest he fit one.
Cheers, Graeme

Don't do the flotation buoy. They were tried in the 60s and apart from hire beach cats they were discarded. The best thing your friend can do if they have bought an F25 or Bucc 24 is to sail it in nice weather and also crew for someone on an F18 or high performance beach cat. Learning about apparent wind angles and how to power up or depower a boat is essential. Sailing a 16ft skiff would be a real help too. But the flotation things have to be large to work, have broken off, and require a sideways only capsize, (which is not usually how they happen). And what do you do at right angles anyway? You can't pull it back up without assistance and the water finds its way into the amas while the mast is put under huge load and probably breaks. Learn to sail fast and reef early. AS to the OPs question. Every multi can be blown over by just the wind. It just takes more wind to blow over bigger cats. I am not sure how much is needed to blow over a Seawind but they are wider than an International, have daggerboards so they slip sideways better, and have nice rounded decks. I haven't heard of one blowing over. Paul Nudd, ex Gladstone champ on XL2 used to have one. He said that when he got hit by a huge gust the boat would slide to leeward with the canted boards letting the windward hull slide and lift whilst the windward one was pulled down by the canted board, and he could push a boat hard.

Ok thanks