Deep dive into the IMOCA 60 design and foils (It's complicated!) | The Ocean Race
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- เผยแพร่เมื่อ 13 ก.ค. 2021
- 🚨WARNING 👉 Only watch this video if you're ready to get technical! 🚨
World-renowned yacht designer Juan Kouyoumdjian explains just how much work and detail goes into the design of the IMOCA 60, where The Ocean Race Europe IMOCA class was lost and won and where the future lies for foiling offshore boats.
This special edition of Off Watch was recorded during The Ocean Race Europe, and a new series of Off Watch will be coming this September 💪
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Please keep design and engineering vids like this coming, go thru the whole boat!
Niall is a fantastic interviewer and presenter. An asset to The Ocean Race.
Could he be a commentator for the GP´´s ???!
I could spend hours and day's listening to IMOCA tech talk with design guru's such as Juan.K and G.Verdier. Please post more of this type of videos.
And keep up the good work Niall.
Wow this was very interesting. I'd like to see more of that.
What a PHENOMENAL interview. I'm no engineer, but as a sailor who learned in beetle cats, i am fascinated by how these flying boats work. And Juan so clearly explains how the process works.
This interview is the most helpful I have seen regarding the IMOCA variations among the Ocean Race Europe fleet and the rule requirements. Niall, your warning might 'fend off' interested viewers because Juan is technical but does it verbally and with the outstanding video inserts showing what Juan has just said, this video is really quite easily understood by the non-technical, IMHO. Honestly, I would love to see the CFD modeling overview particularly the 'skimming' mode and foil shape parameters. OK, that video should carry a warning!
Agreed, Juan.K really explained things in about as laymen terms as you can get. Any slight interest in IMOCAS, this is all understandable.
YES, PRETTY GOOD EDITING, NO?
Fascinating interview, appreciate having a designer who is so frank about all the aspects of the concept. I now understand a bit more about the rudders and the end plate effect of the hull.
Great, great video with full geek mode. A big thank you to Juan K. for taking the time to explain all of this.
More, More, More !!! One cannot have too much of this sort of content. I met Juan K once and he was like an excited child when discussing boat design. He was already a star after designing the winning Volvo 60s but was as down to earth and easy to talk to as one could ask. He is just so passionate about his craft.
Fascinating to get Kouyoumdjian's insights and expertise!
I agree, it was exciting to hear something from a designer of these machines. More of that, please, if possible.
Brilliant! Would love to hear a comparison of the various foil shapes, materials and layups used throughout the fleet.
We managed to do a 'tour' round the IMOCAs that where birthed in Alicante harbour during The Ocean Race Europe , and that's on our channels. But I'm guessing you want something far more in depth. If we get the chance, we will get to it for you.
Slightly late to watching this but it is fascinating for a lay person like me. We watch these boats doing amazing things, to have even a little understanding of the reasons why they are as they are and the thought processes behind the decisions is great. Especially when there are articulate, passionate people doing the talking. Keep this type of thing coming.
That was brilliant, love the tech talk, thanks.
This was *super* interesting. I loved it, thank you to both of you for sharing.
Really grateful for these explanations. Thank you for sharing this.
Great interview. Thanks to Juan K for explaining these difficult concepts succinctly. Really great. Keep these vids coming!
Absolutely fascinating and I would LOVE to hear more technical boat/sailing vids. VERY GOOD
Fascinating insight into the IMOCA design and latest developments. Keep them coming!
This is great stuff. Fantastic hearing from the legendary JuanK.
Keep it coming Niall you are doing a great job.. looking forward to the next race watching from downunder.
Yes, this was really interesting. I was around a boat design draftsman in the '60s & '70s who was all about hydrofoils, getting boats to 'fly', but with the aid of 'lifting sails'. Please keep us tuned to the engineering! GREAT STUFF!
Thank you for sharing this, videos like these are pure gold!
Awesome technical piece... thank You!!!
Fascinating! Love these deep dives!
Brilliant, enlightening. Thanks for sharing
A fantastic interview - so much to learn
That was truly insightful! Thanks for sharing this!
Fantastic video I understand far more about how the foils work now it would have been nice to see some free body diagrams when he was talking about the horizontal and vertical forces.
This was brilliant. You can have some great series on these types of conversations and knowledge sharing.
👏👏👏👏👏👏excellent explanation, what a good idea to address design issues.
Excellent video
More of these PLEEEASE.
That was fantastic! Thank you
Loved this.
that was terrific - have a bunch of those !
Amazing insight!
Great interview, fascinating….I am going to add “bumps” to my boat now 😎
Fascinating. Not many designers would be that frank. Not prepared to talk secrets in a public forum. Choices Choices. I like JuanK I think as he gets older his decisions are becoming wiser and more educated. He has hot competition from VPLP and Verdier etc. The skow bows are now a huge performance advantage for certain conditions. Watch some of the Class40 action for more on that.
IMOCA 60's hulls appear to resemble windsurfboards more and more. I can imagine IMOCA bows with 'scoops' like those boards, in order to prevent nose diving. Also on windsurfboards, on deep courses it's hard to keep control since you overtake waves all the time.
Super interesting!
Fascinating
We should do an updated version of this video
Very very good !
Muchas gracias!!!
Creo que entendí como 1/8 parte de la info pero ni modo, cuando tenga un imoca repaso.
🤙🏼🍻⛵
amazing!
I keep hearing this term "skimming" how is it defined and how does it differ from planing? Is it partial foil support?
You are correct to question it. skimming = planing. The three states being: 1 - displacement, where the boat is floating (very high drag), 2 - Skimming / planing, where the boats skips along the surface (medium drag), 3 - foiling out of the water (low drag)
Really interesting to reach back to this after Leg 1 of the Ocean Race. Why different modes worked for some.
Now we have sustained like for like conditions, why are Holcim lower and faster? Is it foils, or rig, both?
Great off-watch!
Great content. Shame it was just suddenly cut short. Nice to have the “backstage” guys on screen as well and not just the stars
What really got me was how Team Germany performed so well without the foils. These boats have secrets. ❤️
Yes, the daggerboard and more traditional bow facilitates higher mode sailing speeds in lighter conditions. As Juan.K said, the IMOCA performances will differ considerably between crewed and singlehandedly. The Ocean Race is going to have many new revelations. Can't wait.
Credit to the sailors for getting a lot out of that boat. A lot of 'what if's' when you scale TORE up to the round the world race, but along with differences in design and conditions suiting each boat in different ways, the sailors deserve praise for the way they raced.
The foil lifts the center of gravity. You keel the headsails and mast deep enough to stay in the water when the foils lift the center of gravity. Stable keeling design reduces heeling over and increases speed of the boat. Then lift leaving the keeling line in the water.
with the constant lurking danger of nosediving while foiling I wonder if it would make sense to reduce that risk considerably by having two smaler set of foils. Like one pair in the front and one pair aft. Or like a smaller pair in the front and a slightly bigger one somewhere in the back of the boat. I wonder if someone has ever thought about trying this or maybe even had some models to scale with this configuration? Would be great to get an answer to that! Because at least to me that seems to be the obvious solution to this constant threat of nosediving !
You need displacement and keeling design in the bow.
What exactly is meant by the foil angle around 20 degrees (min. 8:30)? Is it the Angle of the shaft to the water?
It's roughly the foil angle which balances lateral and vertical force, a foil angle higher than 20deg would create a lot of vertical force meaning there wouldn't be a very strong side force resulting in the lateral force from the sails being stronger than that from the appendages, if you make the foil angle below 20deg you end up having not enough vertical force resulting in a lot more drag due to the high boat speed needed to create an effective amount of vertical force, this means in light winds and even most reachings the boat would be very inneffective compared to one which has a 20deg foil angle
Wings and blades on my catamaran that is twice as wide as it is tall. Force vector ratio three to one and headsails keeled and mast keeled.
so you guys basically designed sail driven submarines?
Really Missing the VOR era.
Smart guys, my 23 ft. day sailer needs some improvement
the sailyatchs that wanted to fly :- D
Blade keel first then lift the flying Dutchman at the center of gravity.
F1 of sailing
👍 Awesome episode, thank you! I'm keenly interested in the technical design of cutting edge sailboats, and it was fascinating to listen to Juan Kouyoumdjian's explanation of some of the issues the designers face. 😎 🇦🇺