I didn’t understand 99% of that but loved every bit of it as usual

Well spotted Tom. The two jib sheet layout is super neat and I would guess this is a much lighter solution particularly if the jib boom boys have some water sloshing around in the bow garage. No doubt they will have load cells on each sheet so they will know the ratio of distribution.

You know your sailing, Mozzy. The things you spot others miss is just amazing.

I adopted on my Hanse Yacht 300 the Alinghi system with a fiddle block with becket and a double jib sheets. It works well!

I gotta say, that zipper fairing/cover on American magic is genius!

I switched over to the double jib sheet system on my i14 follow the 2022 worlds and seeing how simple Archies system was. It took a minute to wrap my head around how it worked but once you understand it, its dead simple. While doing this transition, We got a new 3di north jib and just had two clew points put, one as far aft as possible on the sail and one that runs almost straight forward. The amount of control that you have over the sail shape is crazy!

The simplest possible solution to a specific problem is always the best one. However it relies on how well one has understood the problem, and how well one has explored the 'system' in total. I would think it is a choice between Alinghi and INEOS - but that impression is only from what you have presented to us.

Since that simplest solution is known (I14) then I believe that is the warning flag that it is likely not the best system, in that all the teams must have looked at it. Usually when there is a “best” solution, designers collapse on that solution, when no one knows what is best you get this wide variance.

With the two sheet system on Alinghi, as the clew gets sheeted very close to the deck & the relative tension in both lines increases and approaches equality, the smallest tension change in one line will have a relatively large influence on sheeting angle - basically meaning that the system becomes over-sensitive. Small adjustments of each sheet have a big influence on sheeting angle, making the trim quite coarse and difficult to fine tune.

Great analysis. It would be great to see a comparison series that compares the known approaches to hull designs (above the deck and below may be 2 episodes) and so on as the race gets closer and more details become less variable.

Thanks! Love that amazing video again!

I'm enjoying the fact that every aspect of these yachts is open for the competitors to develop. Each will have a strength in one area but how the whole package comes together is critical. It could be that the winning team doesn't get any one particular area judged number one but across the board have most areas scoring close to the best, if you know what I mean.

It all makes sense to me but I sailed Skiffs and other dinghys competitively for 20 years. I would love to see under the foredeck on the other entries. Cheers Mozzy. Getting close now mate to the cup. Can't wait! Going to be epic.😁🙏🇦🇺

I wonder how much inspiration they can take from what they have done with the main sail controls. Would be interesting to compare how the controls differ? Not sure I fully get how big a difference the 2 skin main makes through. That might be an interesting topic too.

Great to see you at your genius sleuthing again, Tom. Well done.

Grazie per il lavoro che fai! ❤

Alinghi’s simplicity is appealing. If they mount the track deeper under the foredeck would that defer the problem of the two sheets pulling against each other?

I also like the simplicity of the Alinghi system.

Thanks.

Nice spotting and commentary. Like you I like the 2 sheet system but so that tension remains constant with AoA the fixed point needs to be close to the forestay . This implies a large space for the arc of movement for hydraulics under deck similar to a jib boom. Interesting issue with foredeck volume and self bailing as exposed by American Magic . Keep up the good work