On Friday, September 16, 2016 at 4:36:01 PM UTC-7, waremark wrote:
On Friday, 16 September 2016 21:23:48 UTC+1, wrote:
The Air Avionics Butterfly has developed an outstanding reputation as having a competitive advantage for its ability to "instantaneously" calculate wind direction.

Does the CNv (with latest 3.3.3899 or beta 3.4.4089) calculate wind as quickly as the Butterfly?

T8, what is the wind direction update rate of the CNv?

If anyone has experience using both varios at the same time, please share your opinions.

And how do the LX Nav varios compare? I have LX9000/V9. I am impressed by the way it shows me wind changing with height as I climb in wave etc.

Unfortunately that tells us nothing about how accurate the real time wind calculation is. I have flown with the Butterfly vario for 2 seasons now and can say that the wind accuracy is good, but sometimes goes bonkers (off by 10 kt or more). I monitor while circling and can compare it to my track over the ground. I have also set up the Butterfly to display both true airspeed and GPS ground speed. The difference is the head/tailwind component. I can compare that to the real time wind vector for a sensibility measure.

Tom