America's Cup 2021 Defense

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#2624083 18-Dec-2020 18:30

networkn:

Missed the TNZ races, what top speed did each boat hit and what was the difference in distance at the end?

R1 1:32 secs

R2 1:42 secs

R2 stats here at 2:50.38

https://www.youtube.com/watch?v=HjR9O96-VrI

At 2:51 is an excellent graph of race speeds and explanation. They didn't show the stats for R1

Oblivian

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#2624084 18-Dec-2020 18:43

Even the youtube dedicated data feed was broken. No animation, no race overhead. Just wind speed and direction.

Presumably a fault

old3eyes

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#2624114 18-Dec-2020 21:07

SirHumphreyAppleby:
FineWine:

Who are streaming this for free ?

Live streams are available on YouTube.

https://www.youtube.com/playlist?list=PL0sllUFB3RvAk_psnPBwg3m0lSnFqSwwE

Tried watching it there but only had a single camera mounted on the back of the boat and that was it. Went back to TVNZ.

Regards,

Old3eyes

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#2624115 18-Dec-2020 21:10

There are 4 streams on YouTube

1 the world feed which is what TVNZ has - Day Three will be here: https://www.youtube.com/watch?v=IvFn_sXRxHk

2 Port entry boat rear camera

3 starboard entry boat rear camera

4 Virtual eye graphics (with feeds 2 and 3 also on the right)

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k1w1k1d

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#2624626 20-Dec-2020 16:07

Looks like they need to use oars or paddles with the lack of wind.

ezbee

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#2624637 20-Dec-2020 16:36

Surprised they are not prepared for low wind conditions.

I seem to remember past events in Auckland where it was many days of these kind of conditions in summer.

Except when a storm came through and then it was too windy.

The sea breezes in Manukau and Auckland Harbours opposing each other does not help.

Someone who sails the Harbour regularly in summer can probably comment with more authority.

tdgeek

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#2624638 20-Dec-2020 16:40

ezbee:

Surprised they are not prepared for low wind conditions.

I seem to remember past events in Auckland where it was many days of these kind of conditions in summer.

Except when a storm came through and then it was too windy.

The sea breezes in Manukau and Auckland Harbours opposing each other does not help.

Someone who sails the Harbour regularly in summer can probably comment with more authority.

Id say the local and international professional sailing fraternity are familiar with all venues. Speeds approached 31 knots in Race 1, and it faded. Whether that's easily predictable, I'm not so sure.

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#2624641 20-Dec-2020 16:48

Theres sailing, and then there is foil flying. The prior can be done with a designed hull, code-O or changable spinnaker. Foil monos loaded with carbon fibre and more of a wing, not so much.

Scott3

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#2624648 20-Dec-2020 17:15

ezbee:

Surprised they are not prepared for low wind conditions.

I seem to remember past events in Auckland where it was many days of these kind of conditions in summer.

Except when a storm came through and then it was too windy.

The sea breezes in Manukau and Auckland Harbours opposing each other does not help.

Someone who sails the Harbour regularly in summer can probably comment with more authority.

For the organizers, light winds are part of the sport, and not much can be done about them other than holding the event in a location with reliable winds like perth, or holding it at a time of year with more wind.

Such is the

It is good they have scheduled the start at 3pm. I have done many regattas with 10am scheduled starts where everybody waits for the wind to fill in at say 2pm...

For the teams, there is a direct trade off between being able to get up on the foils in lighter winds, and performance when up on the foils. Things like building the foil bigger, or carrying & deploying a code zero (additional sail). Both help the boat get up, but add drag once it is up.

Other factor to consider is the wind limits for the event. Races will not start if the wind average over the prior 10mins is less than 6.5knots, or over 21 knots (23 for challengers final / America's cup).

Also the time limit can act as a defacto wind limit. No point optimizing you boat for non foiling mode when it won't be able to make the time limit if it does a decent chunk of the race in that mode.

All teams will have weather modeling for the event dates, race times etc, and have a good idea of the odds of each different wind strength they will race in. Note that wind strengths outside of the range don't figure in this as there will be no racing. So the glassy water no wind days don't mean a light air boat should be designed.

It seems most of the boats can get up on the foils in 8-10 knots of wind, and they will have each picked the number, accepting that in the event that the wind is greater than 6.5knotts (requred for race start), and less than 8-10 knotts, they won't be able to get up on the foils again if they drop off. Trade for this is more speed when they are foiling.

Should note that the teams can tow the boats up on the foils, (as the UK team did today) 3+ minutes prior to the start (they are not considered to be racing at that point, so outside assistance is allowed), meaning they can enter, and start while foiling as long as they just don't slow down enough to drop off.... Boats can stay foiling in quite a lot less wind than they need to get up, probably around 6.5knotts of windspeed.

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#2624652 20-Dec-2020 17:23

Seems that if no racing by 6pm there will be no racing according to Stuff reporters. If there is, its two races, which to me is the two semi finals, then what?

Cant go past 7pm as shipping lanes need to open

tdgeek

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#2624654 20-Dec-2020 17:26

The wind speed at the moment is about 4 knots. It needs to be 6.5 for at least a minute for racing to go ahead.

ezbee

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#2624663 20-Dec-2020 18:00

No backup date , so that's it.

This has to be very hard when talking to sponsors for more money to fund developments.

Sponsors are looking for exposure of their brand and great stories to link to it.

Handle9

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#2624671 20-Dec-2020 18:35

ezbee:
No backup date , so that's it.

This has to be very hard when talking to sponsors for more money to fund developments.

Sponsors are looking for exposure of their brand and great stories to link to it.

This was a one off day with literally nothing on the line. I don't think anyone is losing sleep over it.

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#2624696 20-Dec-2020 20:39

Handle9:
ezbee:
No backup date , so that's it.

This has to be very hard when talking to sponsors for more money to fund developments.

Sponsors are looking for exposure of their brand and great stories to link to it.

This was a one off day with literally nothing on the line. I don't think anyone is losing sleep over it.

This.

In sailing single day regatta's (except long distance races) are basically unheard of as are sudden death events. The sport has an element of luck, so generally regatta's have many races so one or two cases of good / bad luck don't decide the event.

If anybody cares about the result there would have been many more races, and the ability to loose some days to no wind and still have a result.

There were ment to be three AC world series regatta's in different countires. Covid-19 saw the first two cancled (team NZ's boat had allready been shipped to Europe when the pandemic hit).

Christmas cup was a single day stand alone regatta seeded by the prior three regatta's as a pseudo finals.
Cancellation of the first two world series regatta's made the format weird. Having an extra day (finals?) For the world series regatta would have been the way it would
have likely been set up if the pandemic was know about when the format was chosen.

These were mostly expo regatta's and had highest value for countries that don't get to host the Americas cup itself.

For the sailors they just see it as practice towards the Americas cup and its challenger series. That said they all hate to lose.

For the spectators, sponsors etc, they just had three days of good racing with a result.

Technofreak

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#2624729 20-Dec-2020 22:45

tdgeek:
The wind speed at the moment is about 4 knots. It needs to be 6.5 for at least a minute for racing to go ahead.

Perhaps they should have been in the Manukau Harbour.😇 😈 It was a steady SW 11 knots at 17:30 and 7 knots or above till 20:00.

I know, the Manukau isn't a viable option. Just goes to show the effect of the sea breeze off setting the effects of the prevailing wind.

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