The Ocean Race 2023 leg 3: Capetown to Itajaí, Brazil

Swanno

Super Anarchist
In the 11th Hour videos, there is always someone sitting to windward holding a line in their hand. Yesterday, that line was named as a sheet. Does anyone know which sheet, and why only 11th Hour consider it necessary to let go at a moment's notice, and also how that works, seeing that the line is always visibly slack?
Likely the main sheet or something like that to de power the boat if it tries to dig a hole.
 

Potter

Super Anarchist
2,182
435
He was talking about the 1 degree buttons on the auto pilot, not the heel of the boat.
Hmm, listened to it again and still think it is the keel. To my ear he literally says 'try 1 degree less keel', which also makes sense with the aft raked keel meaning the fin generates left and drag so has to be balanced.
 

ET1

Anarchist
541
149
Germany
This is from 11th Hour (Jack Boutell)
"And the living conditions onboard aren’t easy, and we are all being thrown around alot. I can feel my body degrading from so little movement. I feel like a hunchback, always being bent over in the cockpit. We will all need a big recovery session in Brazil.”
)
And look how they are living on Malizia
 

RiseUp

New member
17
24
Herrmann says Malizia could go up to 5kn faster if they wanted to, but they are content with controlling Holcim to minimize stress for the boat and themselves.
 

Varan

Super Anarchist
6,976
2,172
In the 11th Hour videos, there is always someone sitting to windward holding a line in their hand. Yesterday, that line was named as a sheet. Does anyone know which sheet, and why only 11th Hour consider it necessary to let go at a moment's notice, and also how that works, seeing that the line is always visibly slack?
The line attached to the puke bucket?
 

Varan

Super Anarchist
6,976
2,172
The boatfeed from Biotherm shows 43.5 knots true wind speed and the following seas are mountainous.

"These are proper, proper ocean waves," said Team Malizia's Will Harris. "They make it very challenging to sail in but also kind of fun. Every now and then you get an epic surf - full speed down a wave. It's nice when you feel in control. When it doesn't feel in control, when we have big gusts, then you're a little bit nervous."
 
maybe 1 degree less heel?
I thought it was "heel" at first but later I'm pretty sure "Action!" says "keel." Either way it's amazing to me, and the two may be very much related. I'm super impressed by the systems engineering, from the software through to a hydraulic ram that can control 1 degree of roll in very dynamic conditions. I'd think it traces back to high-performance aircraft, which are usually no longer aerodynamically stable but which move the control surfaces almost continuously to maintain commanded attitude.

 

TheDragon

Super Anarchist
3,538
1,580
East central Illinois
The drone footage clearly shows how amazingly level the keel/foil combination keeps these boats, and the TM data backs that. Takes me all the way back to racing 470s when our coach would yell at us to keep the boat flat.

Screen Shot 2023-03-25 at 10.14.29 AM.png
 
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Goodvibes

under the southern cross I stand ...
2,294
797
I thought it was "heel" at first but later I'm pretty sure "Action!" says "keel." Either way it's amazing to me, and the two may be very much related. I'm super impressed by the systems engineering, from the software through to a hydraulic ram that can control 1 degree of roll in very dynamic conditions. I'd think it traces back to high-performance aircraft, which are usually no longer aerodynamically stable but which move the control surfaces almost continuously to maintain commanded attitude.


I'll stick with the story that he was instructing someone who doesn't normally drive the boat in which button to press. Those controls use 1 degree increments. The real heel is constantly changing by more than 1 degree.
 
I'll stick with the story that he was instructing someone who doesn't normally drive the boat in which button to press. Those controls use 1 degree increments. The real heel is constantly changing by more than 1 degree.
Well, sure the heel changes second by second. But Rosalin drives all the time, you can't hide anyone on a 4-person crew. Will has more experience with the boat going back to 2019, her first IMOCA, he knows how to trim the boat better.
 
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Schakel

Dayboat sailor
Weather routing March 25th
I adjusted the polars for the fleet and started using the powered-down version as I noted that boats are behind projected locations as the sea state worsens, boats start to reef and boat speeds drop a bit. Also adjusted the sea room around the Chilean coast to +/- 40 nm in order not to route too close to the lee shore.

Settings for max downwind back to 40 kts, upwind 30 kts.

The ECMWF GRIB file was from yesterday 12Z and is too old imho. I don't buy the projected routing. GFS from today 01Z seems more valid, also looking at the current heading of the boats.

Pic 1 has Sat IR color 0645Z boats 0545Z and HPs, LPs plus CF as synoptic chart. That very active LP (50 kts projected) around 40 degrees south and 140 degrees west to the NW of the fleet is relatively stable for position. Fleet in between the HP to their north and the LPs to their south provide nice westerly winds and excellent reaching opportunities.
View attachment 581776

Pic 2 Sat IR color 0645Z boats 0545Z ECMWF wind and pressure
View attachment 581777

Pic 3 Sat IR color 0645Z boats 0545Z GFS wind and pressure
View attachment 581778

Pic 4 ASCAT got lucky @ 0242Z this morning. South west of Cape Horn there is some 35 kts wind, but most is doable 25 to 30 kts steady winds at that moment. Team Malizia and Holcim-PRB +/- 25 kts wind, 11th Hr which is most to the SW of the fleet +/- 30 kts wind.
View attachment 581779

Pic 5 ASCAT 0242Z zoomed
View attachment 581780

Both wind models project parts with lesser winds, but actually most is just plain 30 kts.

Pic 6 ASCAT 0242Z zoomed GFS
View attachment 581781
Pic 7 ASCAT 0242Z zoomed ECMWF
View attachment 581782

Pic 8 Wx routing and table. As noted above the ECMWF GRIB file is too old imho, and the projected wx routing pushes the boats SE but they just gybed ENE like GFS suggests. So I buy GFS.
View attachment 581783

Pic 9 Wx routing and table GFS. Max TWS +/- 40 kts steady projected and maximum significant waves 6 meters. Doable with double or triple reefed main and a fractional headsail.
View attachment 581784

Pic 10 Rounding Cape Horn March 26th evening as per GFS and WW3
View attachment 581785
All good calculations but they are being trapped in too hard winds.
The boat that would have gone further south had a better approach to Cape Horn.
Weather routing March 25th
I adjusted the polars for the fleet and started using the powered-down version as I noted that boats are behind projected locations as the sea state worsens, boats start to reef and boat speeds drop a bit. Also adjusted the sea room around the Chilean coast to +/- 40 nm in order not to route too close to the lee shore.

Settings for max downwind back to 40 kts, upwind 30 kts.

The ECMWF GRIB file was from yesterday 12Z and is too old imho. I don't buy the projected routing. GFS from today 01Z seems more valid, also looking at the current heading of the boats.

Pic 1 has Sat IR color 0645Z boats 0545Z and HPs, LPs plus CF as synoptic chart. That very active LP (50 kts projected) around 40 degrees south and 140 degrees west to the NW of the fleet is relatively stable for position. Fleet in between the HP to their north and the LPs to their south provide nice westerly winds and excellent reaching opportunities.
View attachment 581776

Pic 2 Sat IR color 0645Z boats 0545Z ECMWF wind and pressure
View attachment 581777

Pic 3 Sat IR color 0645Z boats 0545Z GFS wind and pressure
View attachment 581778

Pic 4 ASCAT got lucky @ 0242Z this morning. South west of Cape Horn there is some 35 kts wind, but most is doable 25 to 30 kts steady winds at that moment. Team Malizia and Holcim-PRB +/- 25 kts wind, 11th Hr which is most to the SW of the fleet +/- 30 kts wind.
View attachment 581779

Pic 5 ASCAT 0242Z zoomed
View attachment 581780

Both wind models project parts with lesser winds, but actually most is just plain 30 kts.

Pic 6 ASCAT 0242Z zoomed GFS
View attachment 581781
Pic 7 ASCAT 0242Z zoomed ECMWF
View attachment 581782

Pic 8 Wx routing and table. As noted above the ECMWF GRIB file is too old imho, and the projected wx routing pushes the boats SE but they just gybed ENE like GFS suggests. So I buy GFS.
View attachment 581783

Pic 9 Wx routing and table GFS. Max TWS +/- 40 kts steady projected and maximum significant waves 6 meters. Doable with double or triple reefed main and a fractional headsail.
View attachment 581784

Pic 10 Rounding Cape Horn March 26th evening as per GFS and WW3
View attachment 581785
All good calculations but they are being trapped in too hard winds.
The boat that would have gone further south had a better approach to Cape Horn.
Eleventh hour racing has a chance to rounding the cape first I.M.H.O.
Ocean race 25 -3.jpg
 

wildbirdtoo

Member
273
455
UK
All good calculations but they are being trapped in too hard winds.
The boat that would have gone further south had a better approach to Cape Horn.

All good calculations but they are being trapped in too hard winds.
The boat that would have gone further south had a better approach to Cape Horn.
Eleventh hour racing has a chance to rounding the cape first I.M.H.O.
I disagree.. 11th hour are being hammered by the sea state. I think that the prudent move is what the leaders are doing. We shall see!!
 
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