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Foiling in zero wind..

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cglazier
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Foiling in zero wind..

Postby cglazier » Thu Jun 15, 2017 4:13 pm

Imagine there is no wind and you are in a wide river with 10 knots of current.
You can sail up river (toward the source of the river) on an Americas Cup AC50 sailboat (or on a kite foilboard).

Thanks to an Americas Cup skipper for presenting this amusing scenario.
(both AC50s and kite foilboards have VMG capabilities of greater than the apparent wind speed)

:wink: CG

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edt
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Re: Foiling in zero wind..

Postby edt » Thu Jun 15, 2017 4:20 pm

We've discussed this before. There are a few locations suggested, a few rivers and of course, tidal currents. Definitely a nice stunt.

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Peter_Frank
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Re: Foiling in zero wind..

Postby Peter_Frank » Thu Jun 15, 2017 10:35 pm

It is still an amazing thing, no wind at all, just the current flowing lets say South 10 knots.

Then you as a kitesurfer in the water, will feel 10 knots of wind from South going North.

Meaning, when you are in the water you drift with 10 knots going South, and when launching (with the kite North of yourself) and riding you can ride "downwind" as fast as you can, and as we know, you can have a higher downwind (and some also upwind) VMG than the 10 knots of "wind", so you can ride against the current going "downwind" and end up going more and more to North relative to land, when you are really fast :naughty:

It would be pretty special though, just to ride when zero wind and fast current only, as the wind gradient in this scenario, would be much much lower than usual over land, and the "wind" would also be incredible smooth and close to "perfect", no turbulence at all - WOW :thumb: :thumb: :thumb:
It would not matter if high trees or canyons or buildings around the river, as it would not disturb this perfect "wind" at all, really a paradoxial scenario :rollgrin:

Also, if you did not ride a fast hydrofoil, but launched your kite, and looped it bodydragging at full pace "downwind" (towards North), you would still end up further south from your starting point no matter how good you are at looping and getting dragged really fast "dead downwind" :D

8) PF

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Re: Foiling in zero wind..

Postby Horst Sergio » Sat Jun 17, 2017 10:22 am

Yes very nice Idea,

I also already thought about this but I am not sure if we have in Europe a river with around 8 knts of speed in the center and wide and deep enough and without to many ships ... But for sure there have to be some places in the world to do such a video. :D :D Let's wait anybody will do it.

At one of our lakes which is in a valley I had many times a similar competition: Beat the ballon. This is just a very old picture but to get an idea.

Image

If there are the normal around 8-10 knts of wind, on the upwind side of the 6 km long lake some ballons are starting. When I see them getting up, I go upwind to meet and we have a downwind race. Sometimes the ballons are coming down to just 40 m directly above the lake (we also asked them ones to go even depper and it is no problem but haven't done a video yet).

For sure in this case the higher the ballon is, the more it is out of the katabatic wind, but often it is a fair race.

Sometimes the ballon wins, sometime me. :D

Must be a cool view from the ballon if your in the middle of no wind and smoking a cigarette seeing no wind. And ten meters under you a foil kiter is passing with 40 km/h "downwind". :D

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alexrider
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Re: Foiling in zero wind..

Postby alexrider » Sat Jun 17, 2017 7:02 pm

edt wrote:
Thu Jun 15, 2017 4:20 pm
We've discussed this before. There are a few locations suggested, a few rivers and of course, tidal currents. Definitely a nice stunt.
Kiteboarding in zero wind. It's possible after all!
viewtopic.php?f=1&t=2394223


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