Leaked America's Cup Data Reveals Controversial Team New Zealand Advantage

[@warwicks2780]

As a part time sailor and full time data analyst this is amazing content. Thank you!

[@ronfrost7160]

So refreshing to see that real sailing technology and application are providing a true measure of the skills required to win the cup on the water and not in the courtroom! And yes, I am a very proud Kiwi. Cheers

[@alexanderkutschera149]

I can hardly wait to see what the AC75s have to bring us to see/not see. This cutting edge sailing is one of the most exciting thing’s going on in technology today. You are helping us lay people almost understand it.

[@paulgush]

Another interpretation is that NZ trimmed their board cant more often because they had to, given how unforgiving the T-foil is. Also, my interpretation of Luna Rossa having better performance at low speed is that they probably had slightly bigger foils. Less time on the back side of the drag curve, but too much wetted area for good performance at high speed.

[@thedoctor907]

From sailing in hydrofoil generation, I similarly aim for max cant and then agressively do mainsail trim. The tricky part is balancing leeway and lift when doing a bearaway.

[@fejzer]

Somebody should hire this man... teams in shambles

[@brettmciver432]

Just like the nation of England is, a shambles "😜😉🍻

[@NeuralEngin33r]

No! He's ours!

[@stevetrouble7080]

Hire a spy to use stolen information against a competitor. Sounds like they should just add a motor.

[@vandyFixer]

Very interesting analysis. As a non sailor I find your technical explanations and breakdowns very understandable and I always learn something new about these foiling monohulls.

[@MozzySails]

Great to hear!

[@Diceloader]

@MozzySails It would be interesting to compare the use of can't angle from the early races to the Cup races. I believe that TNZ only realised what Ineos were doing after they complained about the can't system not being responsive enough. After the software was tweaked TNZ went fully down the rabbit hole. ​​⁠

[@DriverDad58]

Great data analysis! Keep up the good work. Still the best AC news/analysis around.

[@garygavin857]

I have followed Mozzy sails for some time. This episode is a real GEM. You explained clearly how NZ were able to make progress by their technical advantage they thought through. I hope this feeds into the other teams who are about to finalise their Cup design for manufacturing. Thank you.

[@cathybrind2381]

I hope it doesn't.

[@billgiles3261]

As an aircraft engineer and sailor that explanation is fascinating. Thank you 👏. (Especially for the hard work!)

[@pauljohnson9889]

Cunning Kiwis always trying something to stay in front of the herd ! Not bad for a little country of 5 million , and a pretty handy rugby team too !!

[@grahamlauder2866]

Excellent analysis, but why, if ETNZ were working that one design element so hard, were the other teams having reliability problems. I know that some systems work best and most reliably when thrashed, but it seems to me perhaps that the others broke because they didn't make the effort to understand the system beyond it's "up-down" function. Also don't worry about a takedown of the video, I have a suspicion that the majority of your subscribers, like me, are Kiwis and we love this shit. :D

[@mrriesen9004]

My guess is a many small adjustments are easier on the mechanics than a fewer large adjustments.

[@DouglasEKnappMSAOM]

@@mrriesen9004 Might it be that keeping it in perfect balance at all times lowers the stress on the machine?

[@ronjenkins7998]

He should explain why ineos has /is going down the gurgler....Surely the point here was TNZ within the rules...These boats are minutely inspected before competition ..this guy sounds like Dennis Connor..

[@Kiwi17714]

This is a bit late to the party, but I read that ETNZ changed the hydraulic fluid daily. Other teams didn't do this and the fluid degraded or was contaminated with very small amounts of metal.

[@grahamlauder2866]

@@Kiwi17714 Actually I can see that, but metal filings are not really a problem generally if a system is filtered correctly. Of course you could ask where the filings are coming from which any reliability engineer is going to demand an answer. There is another thought though, pushing oil through filters and coolers suck huge amounts of energy. Both of these things contribute to the longevity of the oil however. So then my question would be, did ETNZ decide to take a small hit on fluid longevity by ignoring cooling and have oil filtering done daily on-shore. That would make more sense, because an onshore filtering rig could filter down 0.5 microns as opposed to onboard maybe 10 microns, and get rid of water and carbon (result of overheated oil). That would save weight (although more reservoir volume helps flatten temp curve) and take restrictions out of the system and increase efficiency. I would definitely go in that direction if I was designing the system, given that the volume of oil used is pretty small relative to conventionally powered hydraulic systems, in fact I would be thinking seriously about using water, not oil, much freer flowing on low pressure systems and mechanically more efficient. .

[@jamesaron1967]

With all the time and resources you devote to unraveling the array of techniques and technology the AC teams use for their boats, you really should be working for the AC professionally. You have a gift for this kind of stuff. I'm serious.

[@weatheranddarkness]

I'm glad he's not, there needs to be somebody doing rigourous interpretation on the outside. There are far more people yammering away NOT knowing what they're talking about.

[@JonathanFerrier]

Looks a lot like the raw telemetry data coming off the boats through the wireless data network and then being distributed to the various data users, if thats how they still do it today. I was in the telecom bunker in 2003, a lot less data points but similar all the same. Was fun checking all the boats data comms boxes at 4am each race day. As an early AC nut was fascinating spotting all the tech, especially TNZ but also spotting the problems. Very well done Mozzie, keep following the breadcrumbs, its a smidgeon of whats really going on but you are doing a fantastic job.

[@AdrianThompson-wn8eu]

We really appreciate the hours of work needed to sift through all that data! Thank you. The Kiwis are a canny bunch, and if I was issued a 'one design' package, developed by them, I have to say I would be all over it like rash to see what possible advantage they might have built into the system. I'm not suggesting any software shenanigans, but the simple instruction that the system is basically a deployment mechanism for controlling the foil arms sets the scene nicely for most teams to do just that. Foil tab control and foil development seemed to be quite enough of a challenge for the design gurus.

[@Gefionius]

Fantastic analysis! You have outdone yourself today. Fascinating!!!

[@MozzySails]

It took a hell of a lot of time cleaning noise from the data and coming up with filters to focus on straight line... then I discovered some errors in calculation of VMG in the raw data which needed recalculating. It ended up a lot more arduous than I ever expected. There's lots more of interest in the data sets... if don't get told to take this down!

[@seanricketts941]

Awesome video Mozzy. This method makes me think about the design process behind ETNZ's banana foil (test foil 1) and if this is how they planned to trim it. Also with cyclors back in the cup, the powerplant might be able to produce enough wattage to do that much active main trim. It will be interesting to see which method emerges when the new gen 75's start to race and what the foils look like then. Really appreciate the time put into this one, hope there isn't any backlash for releasing this.

[@vincentanfi]

I wonder whos job it is to watch Mozzy Sails youtube videos in the cup teams... I want to be that guy

[@brianlambert4685]

probably required viewing all team members!

[@happychappy2b252]

Thank you for the time and effort that went into the analysis and video. Really enjoyed improving my understanding of sailing principles (non sailor type) and especially the rather special subtleties of AC sailing

[@RotarySMP]

Thanks for grinding through the anaylsis, and then summarising it so clearly for us. Agree with the comment that it is interesting that other teams had reliablity issues with the cant control systems although TNZ were activating it 10x more often.

[@8cervezas648]

I have watched this three times now. An excellent video on many levels. The narrative, the insight, and the graphics combine brilliantly. My 13 year old and I were talking to the Alinghi guys on their open day about the T Foil on their AC37 and how much control they have over the cant and horizontal angle. Haven't Ineos just broken one of their T Foils in testing recently too? Keep up the great work!

[@johntasker9588]

Kiwi here, very informative and well done making the effort to unravel some data. ETNZ give nothing away, even to the yachting people here.

[@freeaccess5905]

Great job Mossy. Thanks for doing all the work and sharing it with us. It is easy to see your passion for the sport.

[@stevewilliams7122]

Great work Mozzy! Begs the question ‘how are the teams positioned now to use this insight?’ And it will be fascinating to see if teams without T foils make changes!

[@DonaldBrown-v8p]

Absolutely fantastic piece of plausible data detective work, well done Mozzy. Some additional items it would good to get your view on (maybe part 2): 1) Boat handling (aside from grinder effort); 2) Handling in a swell; 3) Take-off predictability and speed, etc.

[@sobobwas6871]

Stunning presentation. You have a gift in bringing highly technical information to the uninitiated (me) in such an understandable manner. I have been hooked since you started. Thank you indeed 👏

[@MozzySails]

Wow, thank you!

[@rorymacintosh6691]

My God, Mozzy Sails, what a wonderful bit of analysis! You are the bomb! I love what you’re doing. You’re an analysis is great, and it also gives an insight into the depth of engineering and science that goes into the creation of these fabulous boats. Of course the boats need to keep their secrets, so we don’t really learn all the ins and outs, your sneak peaks help me understand the enormous complexity of what’s actually going on here. You may take a bit of flack for divulging, secrets, but I think it’s great for the sport for more people to understand how complicated this is. Thanks again.

[@Frankafonia]

Wow, this is really a great insight! Hats off to you man

[@MozzySails]

Thank you, hopefully it brings us closer to understanding what makes these boats tick

[@macscott5290]

One of your best videos yet. Loving the data analysis. Keep up the good work!

[@radarriau]

I can relate to the high, cant angle... tilting the foil to windward and adjusting mast rake, pitch and sale trim is very dynamic on a wind foil. Thank you for the data analysis

[@GordonjSmith1]

V interesting. It rather makes one want to go back and see the technical specifications for the canting system, and rules associated with it, in order to understand if the challengers were aware that they could operate it as frequently, and in small steps. The impression I as an observer had, was that the canting system only provided 'down' or 'up' instructions - so the revelation here for me was that a team could 'nudge it' up or down, as often as they pleased. Fascinating work - my thanks.

[@MozzySails]

The very first line in the old (AC75 V1) class rule for the foil cant system stated: 26.1 Details of a FCS to control the cant rotation of the foils will be specified in accordance with Rule 33. This system will allow cant to be changed during manoeuvres and to make low-frequency cant setting changes, but the system will not be designed to provide high-frequency cant adjustment. The words about 'low-frequency' changes has been removed from the new rule 😜

[@carlosvergara1080]

​@@MozzySails so cant adjustment will still be allowed for this edition then, with no specification on the frequency? Thanks a lot for your content Mozzy!

[@MozzySails]

@@carlosvergara1080 yes, high frequency cant adjustment is allowed. Parts will be one design, but slightly upgraded.

[@AndyUK-Corrival]

Fascinating as,always Mozzy. Feels like the longest job interview, somebody will hire you surely. Thanks for the hide effort analysing the mountain of data. Andy UK

[@EurekaYoungGuns]

Awesome dude! Absolutely amazing that we got this final closure of the last AC. Keep it up!

[@roderick167]

Thanks for the analysis.. didnt see the data until you highlighted it... from a viewer totally not associated with any other syndicates

[@IRL1466]

Awesome video. Don’t want to know how many hours it took to put together! Keep the content coming! We can’t get enough of it !

[@sly6627]

Very much appreciate the effort you put in on this one, fascinating!

[@MozzySails]

My pleasure! Although this video was particularly laborious!

[@TheSailingFamily]

Thank you and your sponsors for this fantastic video. Fascinating stuff! Keep it up!!!

[@leeshaofu]

Awesome job 👍 I'll be sure to keep watching as we head into the AC.

[@Jdcrouch1972]

Nice piece, nicely done. it was 0-stupid o-clock last cycle but I’m sure in the challenger series commentary was talking how bow down was an advantage! Just as well you got the NZ hospitality in the first ac40 regatta, they might not be so welcoming in Barca lol

[@christophercole8877]

Interesting even if not really “controversial “ in the usual sense. I had figured out the advantages of the T-foil during the most recent AC races but didn’t consider all the little details of how to use cant by the second to balance the boat. Great analysis!

[@Dirtytechnique]

Nice analysis. Well explained to folks who maybe don't fully understand how these flying boats move around on the water . No more 3 axis sailing. Its more like 5 axis juggling . Utilizing and maximizing the tools that you to have within the rules. Some will call foul play but most how know we'll say genius.

[@peterwor]

Great Job going through all that data and excellent explanations of the foils too. Superb video...

[@FlyingboatsRCG]

Epic analysis Mozzy. Thanks for all your hard work and presenting it so we can "see under the hood" of what's really going on :)

[@OleMartinLyng]

FANTASIC! Love the deep dig into the element of the data. Not so relevant for my sailing, but new element to my mind when watching live competition. Thanks a lot for keeping my mind busy )

[@derekness7900]

Great analysis Mozzy -it will take me another go through the video to get this 100% 😊

[@passionvoile1650]

Excellent analysis. Worth the time - what a progress this channel has made!

[@richardnorthover8995]

Mozzy sails, this deep dive analysis is facinating. Well doneand thanks.

[@jonathanseal5155]

Bloody fantastic work, mate!! Effing fascinating indeed! You are definitely “ da Man of the AC”…… many thanks for your hard work, and insightful analysis👍👍👏👏🔥🔥🔥

[@roslynhita6149]

Pete said it best when he made the remark .....AC37 will come down to how well the Teams sail their boats as all boats will be very much closer in speed and efficiency..we'll see hey....Oh btw ..STOP giving our secrets away

[@DaveBooth-qs7sw]

He’s not giving much away in the form of secrets! He’s only guessing or assuming he knows what the kiwis are doing! The kiwis will have more knowledge up their sleeves than what Mossy thinks he knows The kiwis aren’t going to disclose their hidden secrets as they are all sworn into secrecy!

[@rogermcgaw7776]

This is an amazing analysis which is rarely done in the sailing world

[@SteelNerve]

Awesome work and finding the needle in the haystack. I'm wondering if the human power is allowed to generate electricity? And not just hydraulic. Cheers, keep up the good work.

[@simonnichol9851]

Well done!! That must have been a lot of numbers to go through.

[@imusuallycorrect]

Awesome analysis as always. Thanks for putting in so much time and effort. I wonder if the teams are watching this channel to check they haven't missed anything!

[@mikeh996]

Appreciate all your work !!! As someone who knew nothing about sailing. I'm new an annoying armchair expert to my friends. And I owe a lot too you .keep up the good work

[@JamesYoung61]

Another brilliant video, you were defiantly the right bloke to give all that data to, looking for something when you are not sure what you are looking for must be incredibly difficult especially with a data dump that big, software to the rescue.

[@MrNickGascoigne]

Great video, makes complete sense when you explain it in these terms.. very interesting to hear this 👍👍

[@MozzySails]

Glad it was helpful!

[@chrisjohnston3978]

Another example of the advantage for the writers of the rules… love these videos!

[@DumfriesDik]

You're truly amazing. I am not a sailor, nor am I an engineer, but you make both very interesting and understandable. Thank you and have a coffee on me!

[@nicholaycalhoun1681]

If you aren’t pushing the boundaries of the rules, you aren’t going as fast as you can. I nominate tnz for an honorary Smokey yunick title.

[@Mentaculus42]

Didn’t Smokey Yunick sometimes stretch the rules to beyond breaking but was crafty enough to usually get away with it? There is a difference between pushing vs exceeding but to win u must test the limits and think outside the box.

[@nicholaycalhoun1681]

im not smokey historian, but i dont think he ever "cheated" but lots of rules were made more clear or changed after he won an event or series

[@ironmantwilliam]

​@@nicholaycalhoun1681👍🏻

[@Mentaculus42]

@@nicholaycalhoun1681 I read of a time where he set up his fuel tank to be pressured so to increase its volume and thus carry more fuel, but that is probably an urban legend. I always liked stories about him. From Wikipedia: Another Yunick improvisation was getting around the regulations specifying a maximum size for the fuel tank, by using 11-foot (3 meter) coils of 2-inch (5-centimeter) diameter tubing for the fuel line to add about 5 US gallons (18.9 liters) to the car's fuel capacity. Once, NASCAR officials came up with a list of nine items for Yunick to fix before the car would be allowed on the track. The suspicious NASCAR officials had removed the tank for inspection. Yunick started the car with no gas tank and said "Better make it ten," and drove it back to the pits. He used a basketball in the fuel tank which could be inflated when the car's fuel capacity was checked and deflated for the race. Personally I would say that that is a lot of stretching there.

[@timransby1774]

@@Mentaculus42 there is a difference for sure. But if you dont get caught - or you're using a loophole - which ETNZ were arguably doing here - then the risk is worth it. Look at F1 where the FIA slam the door on discovered advantages all the time ... ETNZ definitely thought outside the "box" here

[@franspigeaud2199]

This is one of the very best analyses and explanations on what happened in AC 36. Now let all the teams make use of this as far as they did not discover it themselves. Curious to see what will be next!

[@paulspence8672]

Ok so you've leveled up on this one. Amazing analysis, and great video. Thanks.

[@charlottescott7150]

Just amazing Mozzy! Dont get taken off air please

[@michaelparks4361]

Well done with this analysis very cool! Especially interesting seeing the lack of t foil transition in this cup so far as-well considering what happened last time round.

[@lawriebrice1103]

Somehow I think you might have been struck off the NZ teams xmas card list. Great work going through all that data.

[@pblakez]

I think I mentioned this before it also allows some of the foil to be above the water when not needed for lift or leeway there by reducing drag

[@joepbronneberg3057]

0h wow Excellent and very fascinating analysis. Knowledge and analysis shouldn't be something to be scared of :-) as told in school and history. Beside that engineers could also have found out the same!!! So big shout out to you!

[@chsps1]

super thx for the reasearch!!!!

[@anthonyrader3466]

That was a lot of work. A great education in a short time. Thank you.

[@andreparodi]

Great Analysis! Much appreciate the work put in. Quick question. The loud noise that could be heard on the ac75 was that the noise of the electric motor moving the cant system? If so I wonder if there should be an audible different between TNZ and LR. i.e. listening to TNZ you would hear this continual adjustment whilst LR would be more sporadic. Do you think the other teams knew about this aggressive usage of the cant system? Adding battery power for any system seems like a opening for abuse. Too late to change the rules now for the next AC.

[@ilyadorokhov7827]

The data was publicly available and is still is in my github repo. If the organisers didn't want it to be shared they would've contacted me and shut down the tracking app. This clickbait title doesn't really serve the justice making AC organisers look like idiots and making you look like a cool insider.

[@MozzySails]

fair point, data scrape would be better. It was publicly viewable, but the AC didn't make it readily accessible. That was done by other people ;). I don't think it was intentional for the virtual eye for the data to be pooled like this, however, the AC has done nothing to date to discourage it.

[@derekbuchanan5839]

Title was relevant at the time of publication. Criticism a little unfair I would say. The insight from mozzy is the value add, not the data itself and I haven’t seen anyone else so publicly expose that insight. Well done mozzy keep going.

[@sunnymilner]

From New Zealand 🇳🇿! To the "WHINGING POMMY CLOWN, MOSSY SAILS," As A New Zealander I Find Your Remarks Insulting To The Sportsmenship, And Knowledge Of The Emirates Team New Zealand Design Team, And Whole Emirates Team New Zealand 🇳🇿 Franchise! As The Holder, And The Defenders Of The American's Cup, They Have Bagging Rights To Design The Next Boat For The Regatta. They; Must Also Share All Design Data The Boat, And All Data/Rules That Will Be Used At The Next America's Cup With All Teams Taking Part. For you to suggest otherwise, that Emirates Team New Zealand 🇳🇿 Cheated, IS A CONFESSION THAT THE BRITISH ARE A NATION FULL OF, "WHINGERS, POOR LOSER'S, SAD SACK'S, AND POOR SPORTSMANSHIP!" Example: "Did the British Team that lost the cup to America back in the day, cry or whinge when they lost?" I believe that they didn't, BECAUSE, THEY WERE TRUE SPORTSMEN, REAL MEN, HARD MEN. FAIR MEN, AND REAL WOMEN. Not like the people of Britain today. It's Whinger's, Poofter's, and shit heads 💩💩💩💩like you. The Next America's Cup Without The British, Will Be, Simply Best!

[@MotoGuzziMoto]

Thanks for the analysis. This is the first time I have heard any analysis of these boats and found it fascinating. But the first thing that came to my mind was weight distribution fore and aft. To have a higher cant on the front foils, wouldn't those foils either be carrying less weight up front, or perhaps more camber to take the same weight? The first thing I would experiment with (if the rules allowed) is to use the rear foil to support more weight because it is always submerged and not piercing the surface.

[@Bossofyou]

Innovation on another level. ETNZ always a step ahead 😂

[@tracker1265]

Thank you for looking at the data and your analysis. How can ETNZ do the foil adjustment every 7 secs manually???

[@tallteacher]

They are just adjusting an electronic input. You can feel a pilot adjusting the elevators at a higher frequency than that when a commercial aircraft comes into land

[@TheCruisingKiwis]

Fascinating explanation on why TNZ were faster in the last Cup. What package will be this time around is even more so. And how the crews extract that speed could be the difference. In other words, regardless of all the tech wizz bang, it could be won by the best sailors. One would hope! Go Team New Zealand. But I'm a little biased....

[@mikelclark101]

Awesome video. Appreciate the time taken and the fantastic insights

[@temekuguy3465]

You analyzed millions of data points in a matter of hours….incredible. 😮

[@nible63]

You hi Mozi, you need to talk about using the windward foils for bottom mark rounding to increase righting moment

[@federicocordioli7254]

BRILLIANT analysis Mozzy!! 👏

[@bravelyHomoSapien]

I noticed Team NZ started doing this in the GP Sail series last year. They’d heel their boat to windward

[@Hop754]

BRILLIANT analysis. Thank you ! 😊

[@maxgrass8134]

Thanks for putting in the effort! Great analysis!!

[@dougsmith5690]

Fascinating analysis. I wonder what the teams will have up their sleeves next.

[@iforpowell7390]

Really good findings. Thanks for the effort.

[@JosePedroEspinosa]

Many years ago, an Australian dominated the Moth class by heeling his Moth to windward, so the foil generated a windward leeway, while his competitors ran their boats flat. Today everyone in the Moth class sails their boats heeling to windward. Better said, everyone who sails with T-foils does the same thing, even in classes like Wing-foil or Windsurf-foils. Seeing this and seeing that the NZL is the only one that uses T-foils, I had come to the same conclusion, but it was just a suspicion, without data to support it, now I see the information that supports what I suspected.

[@Jet-qj7gb]

That was really really interesting and informative!! Thank you, I’ve thoroughly enjoyed all of your posts and this one is one of your best:))

[@thebarnaclebill]

Fantastic post, ( I even understood some of it ) I am in awe of this guy.

[@TheOriginalRaster]

Great analysis, great engineering work. Thank you!

[@MozzySails]

Glad you enjoyed it!

[@Dan-kt7zu]

This makes the automated control systems even more interesting if foil cant can be controlled in sync with sail trim. Probably a combination of both will be the most efficient.

[@skylineeeeeeful]

Thank you Mozzy, amazing video!

[@solosailingteam9515]

Wow Mozzy, that's so good, nice work

[@grahamb8191]

Fantastic content! Thanks for effort you put in.

[@philipgrice1026]

Brilliant! Thank you. Great analysis. I is this kind of technology that makes me want to watch the AC racing. F1 on the water. Good stuff!

[@IlusioDiamondmask]

Thankyou for all your in-depth analysis. 🙏👊🤙

[@MichaelSpanhake]

Interesting abruptness of the Mainsail traveler trim without any correlating adjustments to the jib sheeting angle?

[@hippodackl1521]

What a great analysis. Kudos!

[@tallteacher]

Brilliant video and analysis. Before I watched this video I promised myself not to go down the rabbit hole of shore charged batteries again in the comments. However that seems to be the topic at hand. How close is an AC to being able to pump the sails to provide drive? As opposed to just trimming to respond to the wind

[@ronanlavelle]

@mozzy - I assumed that everyone had noticed that ETNZ were using their cant arms this way? It was particularly noticeable during mark soundings. However, your comment about getting rid of lift at high speeds to create lateral lift was fascinating

[@user-ym5dm9xd5w]

Great research. Awesome insight. Very interesting.

[@dougyt261]

Id love to hear from the teams after the race to see if they had com to the same conclusion

[@Mentaculus42]

What a great video with explanations that one can learn new things from!!