Fun with Vectors

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FoilDodo
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Joined: 03/19/2008 - 23:50
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Fun with Vectors
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webguy
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Joined: 12/31/2000 - 22:01
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Re: Fun with Vectors

I saw that the other day, great article. Personally, I had thought that the drag from the sailor's body would have been higher like in cycling where it's a huge proportion of the drag.

This, too, was interesting since we were talking about foils:

Quote:
What about hydrofoils?

The hope to use hydrofoils in order to get higher speeds is not very realistic.

By using an hydrofoil the foil drag increases with the square of speed. This is a big disadvantage compared to a planing surface where the drag is nearly independent of speed.

Planing boards are pretty neat things.

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FoilDodo
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Joined: 03/19/2008 - 23:50
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Re: Fun with Vectors

Yeah I thunk that about foils too... can't get all that lift without drag. Gebi says kite foils are faster around a race course (upwind VMG is insane) and the tiny kiteboards are still the straight line speed machines. But the feeling of quietly foiling over chop has got to be SO cool.

Cycling human drag profile is nasty– "C" shape facing forward vs edge-on for windsurfing. I had a "Zipper" (?) bike windshield for a time at school when I biked everywhere. It worked great, but it was a little too dorky for that erstwhile cool dude.

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Re: Fun with Vectors

No wonder I'm so slow.......

"Considering typical body geometries it comes out that the max sailforce is about 35-40% of the weight of the sailor."

Read more at http://boards.co.uk/how-to/how-fast-can-we-go-the-science-of-speed.html#w26Iuv2VbK3UI3qg.99

What happens in a black hole stays in a black hole.

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Joined: 01/24/2012 - 14:11
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Re: Fun with Vectors
randy wrote:

No wonder I'm so slow.......

"Considering typical body geometries it comes out that the max sailforce is about 35-40% of the weight of the sailor."

Read more at http://boards.co.uk/how-to/how-fast-can-we-go-the-science-of-speed.html#w26Iuv2VbK3UI3qg.99

Pick one of these up every time you get off I-985 on the way to Van Pugh. I think they are called "speed fries" in certain countries.

--- The Arrogant Jerk: Crabby and irritable since 1998.

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Micah
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Joined: 02/04/2015 - 17:56
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Re: Fun with Vectors

I have had my share of windsurfing enhancement carbohydrates, although I have to wonder if my 45lb, 110 CM wide Start, and my 215lb body weight have anything to do with my sporadic planing ability. Yes 3 But I really appreciate the depth of this article.

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