On Tuesday, August 27, 2013 5:59:06 PM UTC-7, wrote:
Hello

The Butterfly vario was advertise has a revolution, well almost, on the market.

Is there any pilots using the Butterfly vario who care to comment on the advantages,if any, of this instrument? I am serously interested in acquiring

one but it as to be better than my LX 7000.

Thanks for your input.

Gilles

I have one and I like it. But I have not used an LX7000 so I cannot compare.. It has a zillion more functions and features than the CAI 302 that it replaced in my panel, and has a very nice user interface. It does a bunch of things buut its unique features seem to be:
* Nearly instantaneous wind calculation (inertially derived)
* Inertially derived Vertical Airmass Movement (VAM) which in theory eliminates horizontal gust errors
* Artificial Horizon Reference

The VAM requires some interpretation, but I think supplies some new information that I didn't have before. There are some other varios on the market claiming to use inertial sensing, but it is less clear what they actually do with it, if anything.