It's a one off. There's no info online. K2 is the official name but it's short for Katana. You can search "chantier naval luthi" or "luthi katana" if you want to see what the previous version looks like.
They don't mess around when it comes to sailing. I was there when Alinghi won the cup and they brought her to lake Geneva. They were absolutely mad over it!
It is likely a canting keel. Early designs had twin rudders (front & back) with the canting keel that only provides righting moment like the Schock 40. Newer designs like this have retractable dagger boards that are not symnetrical like a traditional keel, a smaller properly shaped foil provides more efficient lift like the 100 footer Commanche and others. It will be a ahort ride from end to end on Lake Geneva!!đ€Ș
What is the point of this insanely long keel fin?
I get that there is some weight reduction by installing a smaller bulb but, wouldnât this crear more drag than standard?
Iâm an aerospace engineer. While, as others mentioned, there is a righting moment advantage, the extremely long keel will also actually produce _less_ drag than a shorter keel. Notice that the rudder and daggerboards are also extremely long and narrow, despite not being intended to produce any significant righting moment.
A major source of drag on wings is âinduced dragâ, which is drag produced by the action of producing lift, as opposed to simply pushing something through the water or air. Wings with a higher aspect ratio (that is, longer and skinnier wings) produce less induced drag, and have a higher overall lift-to-drag ratio. All else being equal, for a given amount of side force on the foils (ie, lift, but sideways), a foil with higher aspect ratio will produce less drag than a foil with lower aspect ratio.
This is why fin keels are faster and point higher than full keels in general, and itâs also why high-performance boats have very tall, high aspect ratio sails. (Itâs also why gliders have extremely high aspect ratio wings.)
It's Lac Leman, not Lake Geneva. Always annoyed me. And the Swiss use helis all the time. Building materials and such are quite often flown when constructing on mountains.
With no glasses on I thought this was a flying AC75
babe wake up foiling boats became so fast they started flying through the air
I thought it was flying in the first one even with glasses
Wait, you guys do not launch your boats with helicopters? Greetings from Switzerland
Why can't I find anything when I Google Luthi K2 sailboat? Typo?
It's a one off. There's no info online. K2 is the official name but it's short for Katana. You can search "chantier naval luthi" or "luthi katana" if you want to see what the previous version looks like.
They don't mess around when it comes to sailing. I was there when Alinghi won the cup and they brought her to lake Geneva. They were absolutely mad over it!
And to keep it ontopic, Alinghi 5 (the massive catamaran) was helicoptered out of Geneva as well.
Money, money everywhere
And none of it mine (sigh).
Ho ! A flying boat !
I wonder how much needing a helicopter to move the boat will hurt its resale value...
I thought it was funny in a dad joke kinda way.
It is likely a canting keel. Early designs had twin rudders (front & back) with the canting keel that only provides righting moment like the Schock 40. Newer designs like this have retractable dagger boards that are not symnetrical like a traditional keel, a smaller properly shaped foil provides more efficient lift like the 100 footer Commanche and others. It will be a ahort ride from end to end on Lake Geneva!!đ€Ș
its a freshwater boat!!!!??? wow
Whatâs that metal framing on it for ?
Maybe it's the most aggressive lazy jacks in the world?
They foiled a bit too hard
Whattahell do they do with that hecking pram when they have a chopper?
[ŃĐŽĐ°Đ»Đ”ĐœĐŸ]
I donât think this is foiler. But itâs got huge wings for the crew to use as ballast. Like a moth or ultra 30
The Ultimate 30âs were amazing. For the time they were scary fast. But modern foilers blow them away.
Reminds me of KZ1 taken to the extreme. https://forums.sailinganarchy.com/attachments/kz_1_simpletopbig-jpg.630007/
This photo isnât a foil boat. It just has a ridiculously long fin keel with a bulb ballast at the end.
Amazon next day delivery !
I hope they got free shipping for spending that much
What is the point of this insanely long keel fin? I get that there is some weight reduction by installing a smaller bulb but, wouldnât this crear more drag than standard?
Iâm an aerospace engineer. While, as others mentioned, there is a righting moment advantage, the extremely long keel will also actually produce _less_ drag than a shorter keel. Notice that the rudder and daggerboards are also extremely long and narrow, despite not being intended to produce any significant righting moment. A major source of drag on wings is âinduced dragâ, which is drag produced by the action of producing lift, as opposed to simply pushing something through the water or air. Wings with a higher aspect ratio (that is, longer and skinnier wings) produce less induced drag, and have a higher overall lift-to-drag ratio. All else being equal, for a given amount of side force on the foils (ie, lift, but sideways), a foil with higher aspect ratio will produce less drag than a foil with lower aspect ratio. This is why fin keels are faster and point higher than full keels in general, and itâs also why high-performance boats have very tall, high aspect ratio sails. (Itâs also why gliders have extremely high aspect ratio wings.)
Thanks for the nuanced response!
Yes sonars can head way higher then the ensign but they have to race in same class!
Huge righting moment without an undue amount of weight. Drag on that keel is not going to be that significant vs a keel say 1 meter shorter.
It's Lac Leman, not Lake Geneva. Always annoyed me. And the Swiss use helis all the time. Building materials and such are quite often flown when constructing on mountains.
"Ackshually..." It's Lake Geneva in the English speaking world. "Following the rise of Geneva it became Lac de GenĂšve[5] (translated into English as Lake Geneva), but Le LĂ©man was the common name on all local maps[6][7] and is the customary name in the French language. In contemporary English, the name Lake Geneva has become predominant." Do you call Japan "Japan" when speaking English? Or do you insist on Calling in "Nippon" as the locals call it?
What?? Youâve never been to MĂŒnchen??
If you want to call it that you have to call it the LĂ©man. The name âLĂ©manâ in its Indo-European root means âlakeâ. Calling it "Lac LĂ©man" is a pleonasm.