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What is this thing ?

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Tone
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Re: What is this thing ?

Postby Tone » Fri Dec 14, 2018 4:59 pm

When you are following another foiler quite close, you will often feel that vortex. What has happened in the vids above is that at some point, something happened where air got into the vortex allowing you to see it. If you hit one of these with air in it while riding behind someone, you really feel it!

ronnie
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Re: What is this thing ?

Postby ronnie » Fri Dec 14, 2018 6:18 pm

TomW wrote:
Fri Dec 14, 2018 4:33 pm
The vortex is shooting backwards!? Wow
No. The vortex trail is left behind by the wing tips, but as Tone said, the vortex is invisible until the air enters it when the wingtip breaches the surface. Then the air shoots backwards along the invisible vortex, making it visible.

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Kamikuza
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Re: What is this thing ?

Postby Kamikuza » Sat Dec 15, 2018 12:18 pm

I saw one the other day -- just happened to glance down, and saw it shooting back up to the wing tip. Except mine came shooting towards the wing tip...

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Re: What is this thing ?

Postby TomW » Sun Dec 16, 2018 1:26 pm

ronnie wrote:
Fri Dec 14, 2018 6:18 pm
TomW wrote:
Fri Dec 14, 2018 4:33 pm
The vortex is shooting backwards!? Wow
No. The vortex trail is left behind by the wing tips, but as Tone said, the vortex is invisible until the air enters it when the wingtip breaches the surface. Then the air shoots backwards along the invisible vortex, making it visible.
Ok, now I understand fully. it's rather amazing effect!
Could of been a poltergeist or alien sighting.....


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