Moin, 

I do currently use iGlide, which does have a very similar wind calculation but 
does not require zig-zagging. My compass is somewhat accurate to less than 5° 
deviation after I spent some time carefully compensating it. At least in my 
case it appears to work fine. 
I usually use the circling calculation, but it gets confused when flying cloud 
streets with a typically very inhomogenous pattern of circling, scanning and 
some dolphin style. In these cases, I run the cruise wind calculation to get a 
new wind vector. 

We have a club glider where the compass is known to be notoriously inaccurate 
and withstands all attempts to improve the situation so far, because even the 
vario sound volume affects it. In that ship, this kind of algorithm is a 
complete waste of time and any old school estimate is way better. 

Viele Grüße, 
Martin Kopplow

---

Am 23.05.2011 um 17:54 schrieb "r...@raspberryridgesheepfarm.com" 
<r...@raspberryridgesheepfarm.com>:

> The only problem I have with the True wind algorithm is that it requires a 
> compass that is somewhat accurate. What is your experience with the compass 
> requirement?
> -- 
> Sent from my Android phone with K-9 Mail. Please excuse my brevity.

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