Thread: Butterfly
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Old August 28th 13, 06:39 PM posted to rec.aviation.soaring
John Carlyle
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Default Butterfly

On Tuesday, August 27, 2013 10:02:49 PM UTC-4, jfitch wrote:
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.


I don't understand your comment "the VAM requires some interpretation, but I think supplies some new information that I didn't have before". I would think the VAM was an inertially derived NETTO value. What do you think the VAM is telling you that you don't already know?

-John, Q3