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tama_manu

Member Since 19 Oct 2004
Offline Last Active Jan 25 2016 07:43 PM
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Posts I've Made

In Topic: Jules Verne Trophy

07 January 2016 - 07:34 PM

 

More Ultime journalism: http://www.voilesetv...ee-jules-verne/

 

So that the critical part is really the ability to manage the low winds periods (and especially the Azores and St Helena high).

And for that they would need a kind of Oracle (the one in America cup) to do 30 knts in 8 knts of wind, but it could of course not manage the heavy winds.

 

Thanks Yl75 for the translation.  Could an offshore boat carry a rigid wing as with the AC boats?  I was impressed at the ability to feather the rigid wing to de-power here in the SF Bay, but I imagine there are limits, particularly in the Southern Ocean.  Or could the builders manage to rig a reliable telescoping mast to address the aero issues in heavier winds but provide more sail area in light conditions?  Both options seem technically difficult, but so is a canting keel.  The problem is now defined, so a solution can't be that far behind.  I'm sure these have already been debated, anyone have links?

Delta between the two boats now down to 63 miles, or about 2 hours.  Of course it is not a race according the rules, but two of the fastest racing boats on the planet with top sailors are heading in the same direction.  Yesterday averaging over 730 miles in 24hrs.  After 45 days, it's pretty close.


In Topic: Jules Verne Trophy

03 January 2016 - 05:58 PM

Two boats go around fast, at the same time, without breaking. A win for reliability? (Assuming SD keeps its mast up.)

In Topic: Jules Verne Trophy

22 December 2015 - 12:51 AM

I think IDEC was further than 90 miles before the split, around 150 at least (and the live one, not the ghost)

 

Unfortunately this northern route isn't paying right now, I hope it will

 

But the southern Atlantic is definitely going to be very tricky (but interesting!)

No doubt, that Northern option is hurting in a bad way.  The delta between the boats before they split was as little as 62 miles at 12:30 UTC yesterday, according to Volodiaja's excellent tracker.


In Topic: Jules Verne Trophy

21 December 2015 - 05:22 PM

 

 “This morning was only the third or fourth time that we have taken in a reef since the start.”    Francis Joyon.

 

Incredible for sailing 2/3rds was around the planet.

The boat has a heavy air rig (been mentioned several times) so they are relatively undercanvassed.

 

Yes, the shorter boat with less a less powerful rig seeks higher winds. Playing out right now:

 

Attached File  Idec & SD Capture.JPG   131.17KB   2 downloads

 

Before this split IDEC was less than 90 miles behind SD, gaining. After IDEC's gybe, the deficit was over 200, now narrowed to 180.  SD seemed to calculate that the speed loss sailing direct would be less than hit for sailing more miles.  Are they right?


In Topic: Jules Verne Trophy

18 December 2015 - 01:25 AM

 

 

Very interesting with the current separation. I presume they are both keeping their AIS running and radar for obstacles so they will be aware of each others course and speed so covering is easy and making a break difficult.

There is no covering, the other boat is irrelevant.

 

.

 

....it'd be hard to ignore the other boat.      ...human nature.     :mellow:

 

As covered in this thread, SD2 considered whether to follow IDEC if they chose a relatively risky southern option around the high pressure that is currently slowing both boats.  While these are very different boats, which could require different routing, they are considering the down side of splitting, watching each other.  Not one design 'covering' but neither is the other boat irrelevant.  It only makes a difference if both boats beat the BPV record, but then it matters.  

 

Right now it looks like either or both boats could beat the record, and either one could have a shorter time. They have left AIS range, so it is no longer VOR sort of packing together. Now then, are they using the Universal Tracker to watch when further away?