Americas Cup
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@Machpants said in Americas Cup:
Not a small hole either! I wonder what specifically made that large square hole?
That is some hole. A miracle they didn't go down
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@Machpants said in Americas Cup:
Not a small hole either! I wonder what specifically made that large square hole?
It looks like where the hydraulic pumps are to lift the foil arms? From what I have seen they are quite large and probably heavy. The way they came down and impacted on "landing" I wouldn't be surprised if the pumps just kept on going. Guessing of course.
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@canefan said in Americas Cup:
That is some hole. A miracle they didn't go down
The capsize after the splash down might explain that. The hole was out of the water with the boat on it's side (maybe). I don't recall seeing a shot of the bottom of the hull after it had gone over.
It was certainly spectacular.
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Peter Lester was saying something inside the hull had to have come loose for it to cause a hole like that.
The way it landed it didnt look like it would have caused too much stress to the hull to cause a crack.
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@taniwharugby said in Americas Cup:
Peter Lester was saying something inside the hull had to have come loose for it to cause a hole like that.
The way it landed it didnt look like it would have caused too much stress to the hull to cause a crack.
I didn't hear him say that, but sure is what it looks like. Right where the pumps are as I said above.
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@Snowy said in Americas Cup:
@canefan said in Americas Cup:
That is some hole. A miracle they didn't go down
The capsize after the splash down might explain that. The hole was out of the water with the boat on it's side (maybe). I don't recall seeing a shot of the bottom of the hull after it had gone over.
It was certainly spectacular.
I thought the port side was the one in the water before going mast up
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@Kiwiwomble said in Americas Cup:
I thought the port side was the one in the water before going mast up
Yes but it was floating quite high compared to where the hole is. It did take on quite a bit of water apparently and they put pumps in, but it must have been mostly out of the water. Hard to tell as I haven't seen the other side of the hull and guessing from this shot to the one above to know where it was.
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@Snowy I might be missing something, if that's the mast at water line and the keel (as it is) is directly below the mast, and the hole is to the port side of the keel and in front of the foil arm...then that hole must be completely under water, mid stern my be well out of the water but the mast is at water line so the bow must be well under water
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@Kiwiwomble said in Americas Cup:
@Snowy I might be missing something, if that's the mast at water line and the keel (as it is) is directly below the mast, and the hole is to the port side of the keel and in front of the foil arm...then that hole must be completely under water
It is hard to tell, it could be. It was bow down and that was where the water was going it seems, so would have lifted the stern out further and the hole out a bit (maybe)? In that pic you can see where the centre of the stern is well above water line so that may have helped. Really need a shot from the other side which I can't find.
I wonder whether they have any water tight bulkheads in the hull? I doubt it due to weight.
As I said they were pumping it out of the bow, so it was taking on water.
Team NZ tender guys were assisting apparently. -
@Snowy isn't the hole in front of the foils, closer to the bow, so as the stern lifts the hole goes deeper?
edit:
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@Kiwiwomble On our boat the foils seem to be aft of the mast though. There is no mast on the boat in the photo and it could be a bit of an optical illusion due to that green line? I don't think the foils are amidships but could have that wrong. Might be different on Patriot. It would seem logical that the foils are supporting the bulk of the weight so they would have to be aft nearer the center of gravity as most of the mass of the boat is aft. Aircraft wings are positioned to give a small pitching moment between CoG and centre of pressure (lift). That creates a natural "righting" moment in pitch which can be controlled, otherwise you are just balancing on a pin head but they aren't normally too far away from each other as you have to create drag to counter the pitching moment.
I have read the AC75 class rules and I think that they can vary that as part of the design. Maybe they got it a bit wrong? We have capsized too though. The original concept had them well aft:
That might not have worked and they have them forward now. I'm going to have look more closely!
There actually appears to be another hole behind the foil in that pic too...
The buoy on the bowsprit is clue that it was in trouble.
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@Snowy I think they are in front of the mast, they also have the rudder giving lift (to a much smaller extent) at the stern
so I think the hole is about here
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@taniwharugby said in Americas Cup:
Peter Lester was saying something inside the hull had to have come loose for it to cause a hole like that.
The way it landed it didnt look like it would have caused too much stress to the hull to cause a crack.
having seen a fair bit of busted carbon in my time from bike crashes - carbon doesn't break clean through like that
i'd suggest that part of whatever the divers were doing on the water was to cut that hole to get something out / save something / get airbags inside.
Even something punching through something at high speed wouldn't leave a hole as clean as that.
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@WillieTheWaiter Different angle pics show a rather ragged edge, and it is not a perfect square.
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@taniwharugby said in Americas Cup:
Peter Lester was saying something inside the hull had to have come loose for it to cause a hole like that.
The way it landed it didnt look like it would have caused too much stress to the hull to cause a crack.
I assume this is the same interview
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@Kiwiwomble yeah, although the 2nd part of my post, was my thinking, nothing to do with Lester.
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great press conference, their aiming to be back on the water for the semi's
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@Kiwiwomble Looks too far forward to be the hydraulics but nice work with the box. Arrows are more traditional, but things evolve and you aren't Australian (even though you live there).
Yep it does look like foils about amidships and the rudder sure helps with lift astern. That all means that it should have gone down like a stone. I dunno.
Do they have buoyancy tanks or watertight bulkheads? They did get help very quickly too.As @Machpants says I think that hole was bit rougher than it appears unless that had already been trimmed it to repair.
