[C320-list] Polar Charts

[Lachance, Michael B (ISD, IT)]

In everything I've read (see NorthU Trim, 6th Edition page 197 for
example) polars are based on TRUE wind.

Let me re-phrase the original question: Does anyone have a table that
shows for a given wind speed, what is the true and apparent wind angles
for optimum downwind and upwind VMG? (No, the polar does not contain
this information)
Mike
Seychelle, #141 

-----Original Message-----
From: C320-List-bounces at catalina320.com
[mailto:C320-List-bounces at catalina320.com] On Behalf Of crashley at gte.net
Sent: Thursday, June 01, 2006 9:45 PM
To: C320-List
Subject: Re: [C320-list] Polar Charts

I agree only apparent wind makes sense.

CRA
Rosebus #882


----- Original Message -----
From: "Lachance, Michael B (ISD, IT)" <MLaChance at thehartford.com>
To: "C320-List" <C320-List at catalina320.com>
Sent: Thursday, June 01, 2006 6:21 PM
Subject: Re: [C320-list] Polar Charts


No way guys, it's got be true wind speed. Btw, I was taught to use
apparent upwind and true downwind 
Mike
Seychelle, #141

-----Original Message-----
From: C320-List-bounces at catalina320.com
[mailto:C320-List-bounces at catalina320.com] On Behalf Of Jean-Pierre
Salzmann
Sent: Thursday, June 01, 2006 8:07 PM
To: C320-List
Subject: Re: [C320-list] Polar Charts


On Jun 1, 2006, at 4:14 PM, Larry Barr wrote:

> Using the polar chart is the wind speed in knots referring to true or 
> apparent wind?

Apparent -- like almost anything i sailing

JP Salzmann
OM
C320 #880




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