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ac75 Ineos yacht

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ashley needham05/12/2020 17:03:26
6920 forum posts
201 photos

Look up ac75 Ineos on you rube. Wow...more like spaceship that boat.

it has two front foils and these can lift so that it reaches on just one leg and the rear foil.



Charles Oates05/12/2020 23:31:59
597 forum posts
50 photos

I've just had a look, expecting just a fancy yacht, how wrong could I be. That is the most fantastic thing I've ever seen on the water. The speed, turns, sails/ wings, foils, control etc etc defy belief, it's phenomenal. Big thanks Ashley for posting that.


Ray Wood 206/12/2020 20:15:59
2232 forum posts
777 photos

Hi Ashley,

I'm not sure if it's sailing or flying or a combination of both ??

But I do know one of the lads on the crew Seb Greber he was a cadet sailing cats at Pevensey Bay Sailing club 10 years ago when I still sailed real boats So he is used to going fast !! but that's taking it to the next level

Regards Ray

Malcolm Frary07/12/2020 10:03:28
943 forum posts

While "ye cannae brek they la's a physics"* it is amazing how far they bend.

I can't really see them being mainstream working models anytime soon, but then, who knows?

*Montgomery Scott

ashley needham07/12/2020 15:33:58
6920 forum posts
201 photos

I think the issue would be getting the foils to work quick enough, as a model would flip flop very quickly with slightest change in wind.

The video shows the sticky-up foil to windward coming down very quickly, for something that weighs 1.5 tons.

it also says the boats weigh 6-7 tons....whereas a traditional boat of similar size would be 30 tons. Just incredible.

I think they might say something about generating power, but the foil hydraulics are battery powered, and onehopes they would last for a race (before the low voltage alarm starts bleeping)...


Malcolm Frary08/12/2020 10:39:11
943 forum posts

It's a point that gets plenty of mention at the poolside. A real yacht has somebody on board feeling what is happening, and they have their reaction time to what they sense is going on, usually preventing a disaster. Foilers, almost by definition, to get their performance, are seeing how close they can get to the edge of disaster, and need very fast reactions from the crew to avoid it.

Even if it doesn't have a full size equivalent, a model sailboat can be considered "scale" - it is operating a "scaled" conditions, which usually involve squares an square roots. A 1:25 model gives you about 1/5th the time to react, and your indication is not feeling the boat, it is seeing what the boat is doing at a distance.

In earlier AC events, everything had to be purely muscle powered, what with it being a sort of athletic event. I have gathered, right or wrong, that the trend has been to have a squad of "grinders" - muscle bound athletes whose task is to continuously work pumps which are capable of building up and storing hydraulic pressure. A feasible way to give rapid handling of sizeable masses.

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