lauantai, 31. elokuuta 2013 17.14.55 UTC+3 kirjoitti:

This is a good point. I considered buying the Butterfly variometer to replace the 302 but ended up buying ClearNav. The price was not much of consideration. I watched a couple of videos of the Butterfly variometer in real flight situation and the VAM and the variometer indications hardly ever agreed. This was very confusing.



Isn't this logical considering variometer shows change of total energy including horizontal gusts, and VAM only vertical airmass movement?






The VAM is not used to filter out gusts probably because no one can figure out the algorithm to do so considering what seems often as conflicting information.




I think there is quite good reason for (sometimes) conflicting information, and the use of two indicators has been good solution, based on appr. 100hrs of flying with Butterfly. I bet writing down algorithm to combine inertial and total energy data is difficult, as no one has managed to do it succesfully.

krasw