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post #21 of 30 Old 09-23-2012
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Re: AC72 - On Foils

Oh these beasts fly alright!



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post #22 of 30 Old 09-23-2012
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Re: AC72 - On Foils

And just check out the chase boats! It's not just any old RIB that can keep up with these things!


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Last edited by SchockT; 09-23-2012 at 06:00 AM.
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post #23 of 30 Old 10-14-2012
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Re: AC72 - On Foils

What I don't understand is the apparent simplicity of the foils on the AC boats. They basically look like an L shaped dagger board, with little (if any) means of adjustment. The foils I've seen on other boats of this size appear much more complex and stout. First, I can't believe that little "foot" can take almost the entire load. In fact, one of the foils broke off the first time the Oracle 72 sailed. They Frankensteined something from USA 17 (the tri that won the AC), and that's what they are using now. Given the technology involved in the rest of the boat, it seems rather simple and crude to me. In any case, it's certainly interesting and will be fun to watch.
I throughly enjoyed watching the 45's in SF during the AC World Series. I'll never forget driving down Fillmore street and seeing the tops of the wings flying along at 25-30 knots ABOVE the buildings! It was actually difficult to comprehend what I was seeing. The 72's on foils with a 130 foot wing, should be absolutely ballistic! Seeing it in person will be quite different than on TV. If you can make it to SF in 2013, you've got a ride on my boat! Though, the shore viewing will be spectacular as well. Anyway....I digress. How bout those foils?
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post #24 of 30 Old 10-15-2012
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Re: AC72 - On Foils

I believe the rules don't allow adjustable foils, hence the simplicity. The flying Moths have a rudder foil that can be adjusted with a twist of the tiller which allows them to constantly tweak the pitch of the boat.

I think the Kiwis are ahead of the pack on this one. I have seen plenty of footage of Emirates foiling fast and level. The footage I have seen of Oracle they always seem to have an awkward looking bow-up attitude.

It's gonna be crazy to see these beasts go head to head, although I fear it is going to be the usual, one boat is so much faster than the others that there is no contest.

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post #25 of 30 Old 10-16-2012
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Re: AC72 - On Foils

If the foils aren't adjustable, the ones that are optimized for the conditions on an actual race day will likely prevail that day. Could be interesting. Hydroptère has shown how adjusting foils can make a big difference. Some of these guys may get bad cases of the (comparative) slows if they can't tweak things.
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post #26 of 30 Old 10-16-2012
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Oracle is no more. They flipped and turtled the 72 and she is breaking up.

I am sure Larry Ellison will just build another!



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post #27 of 30 Old 10-16-2012
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Re: AC72 - On Foils

Unfreakingbelievable!!!!! Wow!

That could seriously be the nail in the coffin.


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Re: AC72 - On Foils

This is really a bit mind-blowing.


These guys must have been 40'-50' off the water. Very lucky no one got hurt.


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post #29 of 30 Old 10-17-2012
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Re: AC72 - On Foils

Quote:
Originally Posted by smackdaddy View Post
This is really a bit mind-blowing.
These guys must have been 40'-50' off the water. Very lucky no one got hurt.
Yeah...it's a 5 story fall, and they each carry small air tanks that will give them air for 20 minutes in case they get trapped under something (assuming they didn't hit anything on the way down and are still breathing!).
It's hard to tell from the video, but it looks like the Leeward hull came up on the hydrofoil just as they started to fall off. If so, seems like very bad timing to me. Let's lift up the center of the boat, as we load up the bow, thereby becoming a U-boat!
But then, I'm not a multi hull sailor, and know even less about hydrofoils!

Last edited by L124C; 10-17-2012 at 02:02 AM.
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post #30 of 30 Old 10-17-2012
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Re: AC72 - On Foils

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Originally Posted by Sic Semper Tyrannis View Post
Oracle is no more. They flipped and turtled the 72 and she is breaking up. I am sure Larry Ellison will just build another! Sent from my Kindle Fire
According to this account, the wing is toast, but it looks like the boat is still intact.
America's Cup boat flips in SF Bay - SFGate
Here is raw footage of the salvage operation. Yep, the wing is certainly history. Hulls and dagger boards/foils seem to be intact. Notice how far the tides took her out, despite all the horsepower on the support boats! Wonder why they couldn't get her upright in the Bay when she she still appeared to be relatively intact. Of course, once that 130' wing went under in that tide.....
http://abclocal.go.com/kgo/story?sec...rts&id=8849866

Prior to the incident, it was blowing like stink, and they were falling off into a very strong Ebb. I'm surprised they were pushing it that hard so early in the game. In any case, you can bet Ellison will fix what needs to be fixed. It might be the end for any other team, but this AC is Ellison's baby, and he's got deep, deep pockets and an ego to match. USA 17 will sail again....bet on it!

Last edited by L124C; 10-17-2012 at 03:20 AM.
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