3rd ave wind meter wrong

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Re: 3rd ave wind meter wrong

Postby Aloha » Mon Aug 20, 2012 1:24 pm

Air density is higher on the coast so 25-30 will feel different than 25-30 at 3rd
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Re: 3rd ave wind meter wrong

Postby NCKite_Ryder » Mon Aug 20, 2012 1:25 pm

sc-surfer wrote:You guys are madmen! At 25-30 I'm feeling the juice on my 7m.



Thats what i was thinking...
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Re: 3rd ave wind meter wrong

Postby Thor29 » Mon Aug 20, 2012 1:27 pm

sc-surfer wrote:You guys are madmen! At 25-30 I'm feeling the juice on my 7m.


They're talking about the channel sensor - normally the wind closer to shore will be significantly lower.

A kite size lower maybe? My experience is pretty consistent with Marinkiter - if the channel is 25 with gusts to 30, then I would downsize from 12m to 9m. That's at 190lbs on a twintip.
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3rd ave wind meter wrong

Postby sc-surfer » Tue Aug 21, 2012 5:25 pm

Aloha wrote:Air density is higher on the coast so 25-30 will feel different than 25-30 at 3rd


Hmmmmm. I gotta see the math on that.
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Re: 3rd ave wind meter wrong

Postby MehYam » Tue Aug 21, 2012 11:10 pm

Yeah, I keep hearing this air density <=> temperature <=> power correlation too, sounds dubious. I'm sure there's a difference, I just can't imagine that it's very noticeable @ 25knots between 80 degree vs. 60 degree weather.

Any Bill Nye's wanna prove me wrong?
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Re: 3rd ave wind meter wrong

Postby The111 » Tue Aug 21, 2012 11:23 pm

MehYam wrote:Yeah, I keep hearing this air density <=> temperature <=> power correlation too, sounds dubious. I'm sure there's a difference, I just can't imagine that it's very noticeable @ 25knots between 80 degree vs. 60 degree weather.

Any Bill Nye's wanna prove me wrong?


http://en.wikipedia.org/wiki/Density_of_air

Over a range of 60 degrees C (or 108 degrees F) there is only a 24% change in the density of dry air. So the 20 degree F change you refer to would imply about a 4% change in air density.

Negligible.
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Re: 3rd ave wind meter wrong

Postby le noun » Tue Aug 21, 2012 11:36 pm

I must say that cold air always feels more punchy to me. But maybe it's because it happens at the coast and I think about GW. :mrgreen:
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Re: 3rd ave wind meter wrong

Postby keithdkd » Wed Aug 22, 2012 12:08 am

The gust sensor at 3rd is actually the avg wind speed. Average it with the channel sensor.
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Re: 3rd ave wind meter wrong

Postby le noun » Wed Aug 22, 2012 12:35 am

keithdkd wrote:The gust sensor at 3rd is actually the avg wind speed. Average it with the channel sensor.

That sounds like a good advice Keith.
I usually rig one size up from what the channel is blowing since I stay around the lower launch.
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