Atlantic to Southern Ocean - Vendée Globe
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- Опубликовано: 13 июл 2024
- The trip south through the Atlantic to the start of the Southern Ocean was anything but straightforward. Complex weather systems, a tropical storm along with large light patches spread liberally across the race track proved taxing for all. But there was drama to come.
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Really enjoying the PlanetSail content - keep up the good work.
Amazing rescue effort - incredible seamanship!
Great summary of the vendee so far! I felt so sorry for Alex but then I remembered that this is Jean le Cam's seventh Vendee Globe and he's still kicking it and rescuing his fellow competitors, so I'm confident Alex (And Kevin) will have more opportunities to tackle the Vendee.
Fifth Vendee Globe for Jean, not seventh. Same as Alex actually. But he is 61, and still doing wonders with an older boat. No doubt in my mind that we will see Alex again on the race, him being cut from same cloath as Jean!
need enough non foil boats afloat to rescue the foilers.
A miracle, could so easily have been a tragedy
Wonderful content! Thank you! 👍🏼
On Alex's boat carbon interior supports had split in a number of places, on Kevin's boat it splits in two parts at the mast with no warning. these boats are coming off of their foils and banging hard and they are not upto it, they are not strong enough.
There will be more damage to the remaining foil boats in the southern ocean.
my thoughts exactly, perhaps the repeated breaking of surface tension adds significantly too the impact, either way, that sudden dragg is stress most other boats would not deal with im assuming ignorantly
They need to make these carbon foiling boats a bit stronger in my opinion, how the hell does your Hull crack internally after just the start of the race?
23 days is « just after the start of the race » to you?
@@jules_perz2406 Well, it's like 1/3 of the way, sure its not just after the start, forgive my slight exaggeration here but the point still stands, seems to me hulls should be able to stand years of abuse, not 23 days.
The boat is ten years old. But it is not about age. This is the cutting edge of performance. They are trying to win, they are trying to go fast, they are trying to save weight. This is the Vendee! The Vendee always has about half of the boats not finish.
@@keithc5729 Old could mean fatigued. And indeed, it's the Vendee, they're sailing at the cutting edge of our technological capabilities.
Great sailor Alex and look what happened to PRB a catastrophic failure lucky Alex spotted the damage
“The boat of my dreams” that falls apart.
Will keep cross fingers. Boat is continuously under force/stress and moving, God bless you!
So much for computerised design!
The problem is that a marine environment in general, and even more so the sort of environment these boats operate in - flying half the time and then crashing hard onto the sea again all the time - is so complex that it becomes pretty much impossible to model accurately, and as such the peak loads you can reasonably expect are for a large part, unknown.
Various failures of the current Foilers suggest insufficient Risk Analysis was carried out at the design stage. You really do have to consider highly improbable scenarios of all forces acting on such a fragile structure. Surely an Imoca cannot fold at 90⁰. But it did. Back to the drawing board tour de suit!!
with the increased use of high modulus materials, it is inevitable the peak dynamic loads will be higher. How on earth do you model a foiler jumping off a wave and slamming dowm,?there are so many transferred and complex load permutations. It was reported the break up happened slamming into a wave which is another model, full of all sorts of deceleration and yaw forces. It does seem some of the new foilers are a bit under-engineered.
PRB was a daggerboard design modified for foils. So let's hold the sensationalism a bit, alright? 😉
The new foiling imoca hulls should withstand 66% higher loads than the daggerboard designs.
Why cant they make the boats stronger? seems like they break a lot
They become too heavy, making them slow and thus uncompetitive. It's really hard for the design teams to estimate how strong the various parts of the boat need to be built, as it depends on way too many variables. A light boat will be fast, but a lighter boat will be weaker as well, yet a light boat, because it goes faster, will have higher loads acting on it. If you make them heavier, they become slower and strong, but then also the loads acting on the boat become smaller because they go slower. Aside from all the technical difficulties of even somewhat accurately modelling such things, the loads acting on the boat even depend on the skipper, how hard he is willing to drive the boat.
If you drive it too hard, it breaks, if you drive it softer than you need to, you lose the race. The aim is for boats that do high average speeds, thus light weight is needed, but then again with light boats you need to know as a skipper when to hit the brakes so you don't wreck the boat.
It's all very complex.
Phelps said follow you...
He's always been someone to listen to
Lets say it straight. Some latest 60 class boats aren't well manufactured and designed for bluewater contests. Alex boat structure was weak and foilers in general aren't prepared for contact with underwater swimming objects. The % of accidents is too high to ignore.
Totally agree, a hulls internal structure breaking after 23 days seems inexcusable to me, but I don't know what exactly happened.
None of the boats can handle an UFO. Plenty of cases before foils were introduced.
The normal attrition rate is about 40%. We're at 10% now. So no need to be too alarmed yet.
@@AnttiBrax Thats true. I bring in the designers perspective and state, that it's possible to build foils and rudder like shark tooth 😻😻
@@mikelurban892 To win the Vendee, you need a boat that is designed to be on the edge of barely making it around. 50/50 chance, either you win or you break up. These guys don't just want to finish.
Too late on the news, sorry .
This is such old news.
Well this isn't Twitter.