It’s a ground effect hydrofoil sea plane inter island electric ferry concept, so it’s near its limit in the video.
Ground effect refers to a flight characteristic noticed at low altitudes where the air below the wing compresses between the wing and ground, creating enormous lift with smaller wings or winglets. This makes them much more efficient, especially at lower speeds or with heavy loads.
The largest I know of is the Ecronoplan- https://en.wikipedia.org/wiki/Lun-class_ekranoplan)

Here’s a bit more info
https://www.hawaiiseaglider.org/

Many “birds” make use of this flight characteristic to save battery power during long term surveillance flights, especially just offshore.

So, they are racing hydrofoils now?

Part of the problem with hydrofoils is exactly what you're seeing---once the waves reach the point where the bottom of the vessel is slapping the water each time the waves crest underneath it, a lot of stress and acceleration becomes inevitable---and you're not foiling anymore.

That's why, for the most part, hydrofoils end up being restricted to operations where the bodies of water they are operating on are partly in the lee of something else or sheltered (Lake Como; the Hong Kong/Macau run; Norwegian fiord patrol craft; Baltic sea, etc...) in my recollection...

Reminds me to never ride in a ship without hydrofoils.

Tags for this video have been changed from 'Americas Cup, Team New Zealand, Hydrofoil, Yatch racing' to 'Americas Cup, Team New Zealand, Hydrofoil, Yacht racing' - edited by xxovercastxx

Your video, Highspeed Hydrofoil tries to go "Submarine Mode", has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

you all are ignorant fools.
you are judging this hydrofoil based on results of 3 beginners learning to use it.

i wouldn't want you geniuses to be around when the 1st bicycle was invented.

>> ^Wingoguy:
Go-fast boats are not small hydroplaning vessels. They have a standard V-hull design which using displacement to keep itself afloat. They simply use enormous amounts of power to muscle their way through the water; they have no specific design feature to reduce drag.
Compare:
http://en.wikipedia.org/wiki/Hydroplane
http://www.youtube.com/watch?v=c65F3Bvn2y8
This will only work on nearly flat surfaces as well, not suitable for open ocean drug smuggling.
http://en.wikipedia.org/wiki/Go-fast_boat
http://www.youtube.com/watch?v=MyxSWupqcRY



1. All those "go fast boats" are tiny in comparison to vessels used in naval combat.
2. They have a smaller displacement when moving quickly than when stationary -- i.e. they're hybrids, receiving a significant part of their lift from hydroplaning.

Your video, 47 knots on a Hydrofoil Trimaran, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Thanks kulpims!

In reply to this comment by kulpims:
*promote

>> ^grahamslam:
I agree about it not being as radical an innovation as a hydrofoil...however from a physics point of view, it does give you more traction in cornering as your weight will be shifted in line with the wheels to the ground. Without being able to draw you a pic, just think racecar oval tracks. They are banked, not flat. Why is this? For traction so the cars don't slide off the tracks in cornering.

Banking the track makes its reaction force nearer to perpendicular from the track's surface, which lowers the tendency to slide sideways. Just tilting the wheels while on a flat track won't make any difference to the sideways forces between the wheels and track. It may add stability, but not more traction. You're right though that it brings the force in line with the wheels -- that would allow the wheels to be lighter weight which probably would help corner slightly faster.

>> ^arvana:
From a physics point of view, I don't see that leaning the wheels gives you any more traction than keeping them vertical. Tilting the machine and rider while keeping all four wheels on the ground should give more stability.... and it definitely looks very cool. But I wouldn't say it's as radical an innovation as a hydrofoil.


I agree about it not being as radical an innovation as a hydrofoil...however from a physics point of view, it does give you more traction in cornering as your weight will be shifted in line with the wheels to the ground. Without being able to draw you a pic, just think racecar oval tracks. They are banked, not flat. Why is this? For traction so the cars don't slide off the tracks in cornering.

From a physics point of view, I don't see that leaning the wheels gives you any more traction than keeping them vertical. Tilting the machine and rider while keeping all four wheels on the ground should give more stability.... and it definitely looks very cool. But I wouldn't say it's as radical an innovation as a hydrofoil.

Wow, nice edit. Harrison Ford, Sean Young, Rutger Hauer, even Daryl Hannah all in their prime. It's interesting to see where these actors went from here!

On the music, I remember first hearing and buying Mezzanine while in Istanbul for a few months. It made for interesting music to pass the time while on overnight hydrofoil and bus outings, coupled with the likes of DJ Keoki, John Coltrane, System 7, Jesse Cook, The Prodigy, Banco de Gaia, DJ Shadow, and a few others... I had kind of a surreal summer! (b^-^)b

hydrofoils have been around for quite a long time. apparently as early as 1910.
(see: http://en.wikipedia.org/wiki/Hydrofoil)

not sure why this hadn't been done sooner.