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Questions about BMW Oracle Racing 90-foot trimaran
Team McLube

 



The Publisher
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Sep 3, 2008, 2:52 PM

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Scuttlebutt publisher Craig Leweck will be in Anacortes on Monday, September 8th to join the BMW Oracle Racing team, meet with the sailors, and see their Deed of Gift challenger up close. At this point, they will have been sailing the 90-foot trimaran for one week, and likely will have as many questions as answers regarding the characteristics of their new boat.

If you have any specific questions for Craig to ask, post them here.


hobiedave
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Sep 3, 2008, 7:18 PM

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Is the boat really so scary that they are all wearing PFDs and helmets? Is this just for the initial testing or will this be standard for the boat?

Also, are there any other safety items to protect crew should a capsize should occur?


Doug Lord
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Sep 4, 2008, 5:10 AM

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Craig, I'd be very interested to know what percentage of the total displacement the ama foils are designed to support when the main hull is flying.
Hope you get a ride!
Doug Lord


DanC.
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Sep 4, 2008, 6:18 AM

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How are they handling the wind instrumentation with such a tall mast? Any new electronics developments they can talk about before the race?


tjperrotti
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Sep 4, 2008, 6:47 AM

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Good question by DanC ... especially with respect to wind instruments on a rotating / canting mast. That's a very tricky frame of reference. Can BOR shed any light on how they deduce True Wind Speed and True Wind Direction onboard the tri?


AustraliaII
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Sep 4, 2008, 7:29 AM

Post #6 of 15 (30388 views)
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Three questions for Craig to ask:

1. Does Oracle intend to experiment with a rigid wingmast, as we've seen on the C-Cats in the Little America's Cup in the past and also on Stars & Stripes '88?
2. Does Oracle intend to enter this boat in other competitions outside of the America's Cup (especially if its appeal is unsuccessful)?
3. Given that Oracle is still yet to send the defender its 'custom house registry certificate', as Alinghi is insisting it do, does this imply that this boat may not yet be the final word in its Cup challenge? That is, is there the likelihood that Oracle may yet build a sistership, especially if its appeal is successful, and issue the certificate for that boat instead if trials prove it is faster?


blowboater
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Sep 4, 2008, 1:53 PM

Post #7 of 15 (30315 views)
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What did deigners and sailors learn from previous mega-maxi tris?

How is the new boat different than the previous mega-maxi tris?

What is the most innovative thing (if it can be disclosed)?


The Publisher
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Sep 7, 2008, 11:55 AM

Post #8 of 15 (29967 views)
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Thanks gang. I just printed the Q's above and will take them with me when I fly north tonight.

- Craig Leweck, Scuttlebutt


hobiedave
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Sep 9, 2008, 8:29 PM

Post #9 of 15 (29541 views)
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Any update on the visit and the questions?


The Publisher
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Sep 10, 2008, 6:04 AM

Post #10 of 15 (29523 views)
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I arrived back in San Diego late yesterday, and will get responses and additional info posted later today.


The Publisher
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Sep 10, 2008, 2:13 PM

Post #11 of 15 (29481 views)
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In Reply To
Is the boat really so scary that they are all wearing PFDs and helmets? Is this just for the initial testing or will this be standard for the boat?

Also, are there any other safety items to protect crew should a capsize should occur?


Talking with John Kostecki, the team is being very proactive in the early trialing. Life jackets are mandatory and helmets were optional, and he figured that 90% of the crew was wearing them. There are so many unknowns with the boat, and falling debris was a possibility. While there appeared to be no safety features for the crew in the event of a capsize (nobody is hooked to the boat), the boat is followed by a medical team with two divers geared up for rescue. With 50 degree (F) water temps, the crew wouldn't last too long if they fell in.

- Craig Leweck, Scuttlebutt




The Publisher
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Sep 10, 2008, 2:18 PM

Post #12 of 15 (29478 views)
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In Reply To
Craig, I'd be very interested to know what percentage of the total displacement the ama foils are designed to support when the main hull is flying.
Hope you get a ride!
Doug Lord



The entire team was very cautious about being specific about the design, but the boat is designed to ride on only the leeward float. I suspect the lifting attributes of the curved foil might decrease some of the loads felt by the float. Their goal is to lift the main hull up and ride on only the float.

- Craig Leweck, Scuttlebutt


The Publisher
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Sep 10, 2008, 2:28 PM

Post #13 of 15 (29475 views)
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In Reply To
Good question by DanC ... especially with respect to wind instruments on a rotating / canting mast. That's a very tricky frame of reference. Can BOR shed any light on how they deduce True Wind Speed and True Wind Direction onboard the tri?



I will answer DanC in this post too. I spoke to both Design Coordinator Mike Drummond and Information Analyst Chris Todter, and they confirmed that the cant and rotation are factors that have been inputted into the calcs. Wind variation along the mast height has always been a variable. Todter also noted that their performance analysis tools that have evolved with Cup boats are being revised to adapt to the multihull. Example such as heel does not effect a multihull in the same way as a monohull.

- Craig Leweck, Scuttlebutt


The Publisher
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Sep 10, 2008, 2:36 PM

Post #14 of 15 (29470 views)
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In Reply To
Three questions for Craig to ask:

1. Does Oracle intend to experiment with a rigid wingmast, as we've seen on the C-Cats in the Little America's Cup in the past and also on Stars & Stripes '88?
2. Does Oracle intend to enter this boat in other competitions outside of the America's Cup (especially if its appeal is unsuccessful)?
3. Given that Oracle is still yet to send the defender its 'custom house registry certificate', as Alinghi is insisting it do, does this imply that this boat may not yet be the final word in its Cup challenge? That is, is there the likelihood that Oracle may yet build a sistership, especially if its appeal is successful, and issue the certificate for that boat instead if trials prove it is faster?


1. Wing mast: With the tight time frame to build, they decided that a wing mast would be too much to take on. Part of the problem is the logistics involved to take it down.

2. Regarding other uses for the boat, they haven't thought about it yet.

3. The certificate is required from the challenger, and the courts currently find that the Spanish club is the challenger. Also, the cert is for the boat that will be used in the challenge, and the timeline for the Cup could now delay the racing until late 2009 or 2010, which will provide enough time to build a second boat. Currently, the team claims that no other boats are being built.

- Craig Leweck, Scuttlebutt




The Publisher
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Sep 10, 2008, 3:32 PM

Post #15 of 15 (29433 views)
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In Reply To
What did deigners and sailors learn from previous mega-maxi tris?

How is the new boat different than the previous mega-maxi tris?

What is the most innovative thing (if it can be disclosed)?



The multihull designers were not available, and Franck Cammas was busy too. However, I suspect most of the differences have to do with how the boat will be used. Design coordinator Mike Drummond indicated that a narrower boat would be better for stronger winds, and we all have noted how the around the world tris have more freeboard and fuller hull forms. Speaking to John Kostecki, he finds the mast to be the most innovative part of the boat. It it huge, and is supported with only one set of sidestays... and no spreaders. The section is so big that you could crawl from the top to the bottom with ease.

- Craig Leweck, Scuttlebutt




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