Emirates Team New Zealand.

[weta27]

How old is the shot @weta27 ?

Two days ago

 

[weta27]

Or is this "black space/lines" that you can see in the pic a trick of the eye and actually the back side of the windward mainsail, exposed by the leeward mainsail carrying more camber than the windward one, and probably mast rotation too, and that the leaches are actually touching?      

Definitely a gap all the way up. You can see the telltales coming out of the space between at regular intervals

 

[Groucho Marx]

From my small Frog foiler experience with D mast and double luff main there has to be roughly  15-20mm movement between the two leeches, this depending on the amount of D mast rotation, also wind strength .... so what we see with Aihe's double leech may appear to be a gap but is actually the leeward main being set/moved forward of the windward?

Second thoughts; I'm wrong in the case of the 75, there is a gap between leeches. But on Frog the two sails rub together - and never open out like a gull wing during gybes.

 

[trig42]

And maybe hold on until the boat initiates and finishes a maneuver (gybe or tack)?

And while we're at it, instead of saying they're motoring, how about mentioning what speed you're doing trying to keep up?

The Instagram Post mentions they were doing 28 knots in the boat the film was taken from. Light winds too (big headsail on), assuming this was taken yesterday (11 Dec) it was a pretty calm day here in Auckland.

 

[AJ Oliver]

You can see it in this pic from the launch

I dunno whats going on in that pic, I'm not convinced its a gap but its certainly possible that the fairing thing at launch didn't work out

To my very untrained eye - those look like wing flaps

 

[NeedAClew]

Do the foil flaps have to move all in one piece? If not I think you are right. Get a little piecewisectwist on that flap...?

To my very untrained eye - those look like wing flaps

 

[Lickindip]

Not sure, looks different to me but maybe we just haven't seen it close-up before??

Edit: None of my earlier photos shows anything like this.

View attachment 335524

the flaps are in the 'up position'

they are referred to as Flaps but unlike aircraft flaps that only go down, they should be referred to as elevators as they are pitch control and can go up and down

in looking at the rules there is no restriction in the movement or how they are controlled, (only on the structure build being symmetric)

there is nothing stopping them in the rules to have one side of flap/elevator going up and the other going down (or twisting the flap if the team sees fit)

ETNZ might have them in this position for a variety of reasons

(all assumptions)

1: helps with windage or righting moment (it is a wing after all)

2: just about to lower the foil and having them in the position would help pull it down through the water

3: they forgot to set them back to zero before pesky photographers took a picture from that angle

funny enough they are testing and evaluating ... just like any good cup team should do

been brought up here before muppets took the thread to Hugo boss

 

[Sailbydate]

In the latest pic from Weta, there looks to be little skegs added to the foil, presumably to create some sort of an end-plate effect at the inboard end of the elevators/flaps. These are not present on the launch pic.

 

[Lickindip]

ah see what you mean, they look like little fences.

I'm assuming there will be a fair amount of sideways slip when travelling through the water so would be used to clean up the flow over the joint

 

[The Dannevegus Express]

Definitely a gap all the way up. You can see the telltales coming out of the space between at regular intervals

Thanks Weta...

Hmmmm, although absolutely no expert, do you think this this gap something they are trying to create?

I would assume the windward main under load would twist off and rest on the leeward one and therefore naturally closing the gap?

This I am guessing is Groucho says happens on his Frog Foiler

If they are actually creating this gap, I now ask:-

1. What funky go fast magic are they trying to create by doing this???     I would have thought this would just create a shitload of drag? 

2. How the heck are they actual doing/controlling this???     Is this started with the larger gap around the boom, and adjusted with the mainsheet loads?

 

[bigrpowr]

it would be nice if someone  paced them and told us how fast the speed was. boat looks mean.

 

[phill_nz]

if you read the comments there is one that sounds like it was by the driver of the boat ( her partner )

stating he was doing 28 knts

looking at it

it would seem they were also being heavily gunned down at that speed

 

[KiwiJoker]

Morning, Weta and others with a camera, opportunity and the inclination. 

Please all refer to operational instructions in post #240 above, in case Te Aihe should venture forth. Thank you. 

Fair 'nuff, except I believe Weta does a pretty darn good job in this regard.  And of course some of his footage is shot from shoreside vantage points.

The footage in #232 appears to be at the limit of the camera's range, or user's control.  Plus shot from bumpy small boat at speed. 

Doing this this is a real art, requiring discipline, anticipation and muscle control. 

Best shooter I've ever ridden with is former 12-metre crew Dick Enersen, six-footer with  thighs like tree trunks. First made his name as a shooter and producer back in the '70s. Would stand in a small boat at speed in a seaway, full-size video cam balanced on his shoulder for hours on end, and deliver footage virtually as steady and shake-free as that from a tripod ashore.

 

[Sailbydate]

Fair 'nuff, except I believe Weta does a pretty darn good job in this regard.  And of course some of his footage is shot from shoreside vantage points.

The footage in #232 appears to be at the limit of the camera's range, or user's control.  Plus shot from bumpy small boat at speed. 

Doing this this is a real art, requiring discipline, anticipation and muscle control. 

Best shooter I've ever ridden with is former 12-metre crew Dick Enersen, six-footer with  thighs like tree trunks. First made his name as a shooter and producer back in the '70s. Would stand in a small boat at speed in a seaway, full-size video cam balanced on his shoulder for hours on end, and deliver footage virtually as steady and shake-free as that from a tripod ashore.

Just pullen Weta's leg, KiwiJ. He knows that too. In fact, I'll take this opportunity to thank him again for all the great work he's doing - thanks, Weta and others for the fantastic contribution to this forum.

It's all good. Now, polish up those filters, get those lease caps back on and batteries fully charged and get out there again tomorrow! ;-)

 

[RobG]

Doing this this is a real art, requiring discipline, anticipation and muscle control. 

Not anymore. Cheap hand–held stabilisers for phones and cameras are available for under $100, professional ones under $1,000. You can even program them so that when you move the camera around, the subject stays in the centre of the frame.

 

[KiwiJoker]

Not anymore. Cheap hand–held stabilisers for phones and cameras are available for under $100, professional ones under $1,000. You can even program them so that when you move the camera around, the subject stays in the centre of the frame.

Thanks.  Packed away my Canon gear. Not current and besides can't keep up with the technology torrent.

Looking forward to stabiliser adoption by contributors here.

 

[Ex-yachtie]

it would be nice if someone  paced them and told us how fast the speed was. boat looks mean.

This is the best we have. 
 

 

[The_Alchemist]

The Italians comment on NZ new sail controls 

https://www.youtube.com/watch?v=IlWd_hnn8as

 

[Indio]

Youth America's Cup Announced


A reinvigorated Youth America’s Cup regatta is announced today which will be raced in a brand new class of foiling mono-hull, the AC9F, in 2020 and 2021.

 

[winchfodder]

The mast.

Yes.

No. The lower 1.5 metre (mast lower zone) is pretty much open slather, controlled only by area of entire main and foot girth. See Fig. 20.3 in the rule.

Thank you for the clarification. The NZ hydraulic twin leech line and traveller control looks pretty clever. It will be interesting to see the solutions used by the other teams.